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SNES docs (and other tweaks)
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Electric Keet
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7 changed files with 325 additions and 108 deletions
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@ -10,7 +10,7 @@ double-click to open the instrument editor.
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every instrument can be renamed and have its type changed.
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every instrument can be renamed and have its type changed.
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depending on the instrument type, there are currently 13 different types of an instrument editor:
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depending on the instrument type, there are many different types of instrument editor:
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- [FM synthesis](fm.md) - for use with YM2612, YM2151 and FM block portion of YM2610.
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- [FM synthesis](fm.md) - for use with YM2612, YM2151 and FM block portion of YM2610.
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- [Standard](standard.md) - for use with NES and Sega Master System's PSG sound source and its derivatives.
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- [Standard](standard.md) - for use with NES and Sega Master System's PSG sound source and its derivatives.
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@ -29,7 +29,7 @@ depending on the instrument type, there are currently 13 different types of an i
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- [Konami SCC / Bubble System WSG](scc.md) - for use with Konami SCC and Wavetable portion in Bubble System's sound hardware.
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- [Konami SCC / Bubble System WSG](scc.md) - for use with Konami SCC and Wavetable portion in Bubble System's sound hardware.
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- [Namco 163](n163.md) - for use with Namco 163.
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- [Namco 163](n163.md) - for use with Namco 163.
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- [Konami VRC6](vrc6.md) - for use with VRC6's PSG sound source.
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- [Konami VRC6](vrc6.md) - for use with VRC6's PSG sound source.
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- [SNES](snes.md) - for use with SNES S-APU.
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# macros
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# macros
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@ -1,4 +1,4 @@
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# Amiga/PCM sound sourceinstrument editor
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# Amiga/PCM sound source instrument editor
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The PCM instrument editor consists of a sample selector and several macros:
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The PCM instrument editor consists of a sample selector and several macros:
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@ -8,7 +8,7 @@ The PCM instrument editor consists of a sample selector and several macros:
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# Macros
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# Macros
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- **Volume**: volume sequence WARNING: it works only on Amiga system, as of version 0.5.5!!
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- **Volume**: volume sequence. _warning:_ it works only on Amiga system, as of version 0.5.5!
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- **Arpeggio**: pitch sequence
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- **Arpeggio**: pitch sequence
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- **Waveform**: sample sequence
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- **Waveform**: sample sequence
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- **Panning (left)**: output level for left channel
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- **Panning (left)**: output level for left channel
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46
doc/4-instrument/snes.md
Normal file
46
doc/4-instrument/snes.md
Normal file
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@ -0,0 +1,46 @@
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# SNES instrument editor
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these tabs are unique to the editor for SNES instruments.
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# SNES
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**Use envelope** enables the ADSR volume envelope. if it's on:
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- **A**: attack rate.
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- **D**: decay rate.
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- **S**: sustain level.
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- **D2**: decay rate during sustain.
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- **R**: release rate.
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- **Sustain/release mode**:
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- **Direct**: note release acts as note cut.
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- **Effective (linear decrease)**: after release, volume lowers by subtractions of 1/64 steps.
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- **Effective (exponential decrease)**: after release, volume decays exponentially. see [gain chart](../7-systems/snes.md).
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- **Delayed (write R on release)**: after release, waits until A and D have completed before starting exponential decrease.
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if envelope is off, select gain mode as described below.
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# Macros
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- **Volume**: volume.
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- **Arpeggio**: pitch in half-steps.
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- **Noise Freq**: preset frequency of noise generator.
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- **Waveform**: waveform.
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- **Panning (left)**: output level of left channel.
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- **Panning (right)**: output level of right channel.
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- **Pitch**: fine pitch.
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- **Special**: bitmap of flags.
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- invert left: inverts output of left channel.
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- invert right: inverts output of right channel.
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- pitch mod: modulates pitch using previous channel's output.
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- echo: enables echo.
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- noise: enables noise generator.
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- **Gain**: sets mode and value of gain.
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- 0 – 127: direct gain from 0 to 127
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- 128 – 159: linear gain from -0 to -31
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- 160 – 191: exponential gain from -0 to -31
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- 192 – 223: linear gain from +0 to +31
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- 224 – 255: exponential gain from +0 to +31
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@ -1,11 +1,11 @@
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# X1-010 instrument editor
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# X1-010 instrument editor
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X1-010 instrument editor consists of 7 macros.
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X1-010 instrument editor consists of these macros.
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- **Volume**: volume levels sequence
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- **Volume**: volume levels sequence
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- **Arpeggio**: pitch sequence
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- **Arpeggio**: pitch sequence
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- **Waveform**: spicifies wavetables sequence
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- **Waveform**: specifies wavetables sequence
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- **Envelope Mode**: allows shaping an envelope
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- **Envelope Mode**: allows shaping an envelope
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- **Envelope**: spicifies envelope shape sequence, it's also wavetable.
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- **Envelope**: specifies envelope shape sequence, it's also wavetable.
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- **Auto envelope numerator**: sets the envelope to the channel's frequency multiplied by numerator
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- **Auto envelope numerator**: sets the envelope to the channel's frequency multiplied by numerator
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- **Auto envelope denominator**: sets the envelope to the channel's frequency divided by denominator
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- **Auto envelope denominator**: sets the envelope to the channel's frequency divided by denominator
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@ -4,6 +4,8 @@ a computer with a desktop OS, lifelike graphics and 4 channels of PCM sound in 1
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in this very computer music trackers were born...
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in this very computer music trackers were born...
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imported MOD files use this chip, and will set A-4 tuning to 436.
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# effects
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# effects
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- `10xx`: **toggle low-pass filter.** `0` turns it off and `1` turns it on.
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- `10xx`: **toggle low-pass filter.** `0` turns it off and `1` turns it on.
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@ -6,10 +6,17 @@ also known as Famicom. it is a five-channel sound generator: first two channels
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# effects
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# effects
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- `11xx`: **write to delta modulation counter.** this may be used to attenuate the triangle and noise channels.
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- `11xx`: **write to delta modulation counter.** range is `00` to `7F`. this may be used to attenuate the triangle and noise channels down to about half normal volume.
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- will not work if a sample is playing.
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- will not work if a sample is playing.
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- `12xx`: **set duty cycle or noise mode of channel.**
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- `12xx`: **set duty cycle or noise mode of channel.**
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- may be `0` to `3` for the pulse channels and `0` or `1` for the noise channel.
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- may be `0` to `3` for the pulse channels:
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- `0`: 12.5%
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- `1`: 25%
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- `2`: 50%
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- `3`: 75% (inverted)
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- may be `0` or `1` for the noise channel:
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- `0`: long (15-bit LFSR, 32767-step)
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- `1`: short (9-bit LFSR, 93-step)
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- `13xy`: **setup sweep up.**
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- `13xy`: **setup sweep up.**
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- `x` is the time.
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- `x` is the time.
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- `y` is the shift.
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- `y` is the shift.
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@ -48,62 +55,126 @@ also known as Famicom. it is a five-channel sound generator: first two channels
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- only works in DPCM mode.
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- only works in DPCM mode.
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- see table below for possible values.
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- see table below for possible values.
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# DPCM frequency table
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# tables
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val | NTSC | PAL
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## short noise frequencies (NTSC)
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----|----------:|----------:
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00 | 4181.7Hz | 4177.4Hz
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01 | 4709.9Hz | 4696.6Hz
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02 | 5264.0Hz | 5261.4Hz
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03 | 5593.0Hz | 5579.2Hz
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04 | 6257.9Hz | 6023.9Hz
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05 | 7046.3Hz | 7044.9Hz
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06 | 7919.3Hz | 7917.2Hz
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07 | 8363.4Hz | 8397.0Hz
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08 | 9419.9Hz | 9446.6Hz
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09 | 11186.1Hz | 11233.8Hz
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0A | 12604.0Hz | 12595.5Hz
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0B | 13982.6Hz | 14089.9Hz
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0C | 16884.6Hz | 16965.4Hz
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0D | 21306.8Hz | 21315.5Hz
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0E | 24858.0Hz | 25191.0Hz
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0F | 33143.9Hz | 33252.1Hz
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# length counter table
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note | arpeggio | fundamental | MIDI note | pitch
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:---- | -------: | ----------: | --------: | :----------
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`C-0` | @0 | 4.7 Hz | -9.47 | `d_1` + 53¢
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`C#0` | @1 | 9.5 Hz | 2.53 | `D-0` + 53¢
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`D-0` | @2 | 18.9 Hz | 14.55 | `D-1` + 55¢
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`D#0` | @3 | 25.3 Hz | 19.53 | `G-1` + 53¢
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`E-0` | @4 | 37.9 Hz | 26.55 | `D-2` + 55¢
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`F-0` | @5 | 50.6 Hz | 31.57 | `G-2` + 57¢
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`F#0` | @6 | 75.8 Hz | 38.55 | `D-3` + 55¢
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`G-0` | @7 | 95.3 Hz | 42.51 | `F#3` + 51¢
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`G#0` | @8 | 120.3 Hz | 46.55 | `A#3` + 55¢
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`A-0` | @9 | 150.4 Hz | 50.41 | `D-4` + 41¢
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`A#0` | @10 | 200.5 Hz | 55.39 | `G-4` + 39¢
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`B-0` | @11 | 300.7 Hz | 62.41 | `D-5` + 41¢
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`C-1` | @12 | 601.4 Hz | 74.41 | `D-6` + 41¢
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`C#1` | @13 | 1202.8 Hz | 86.41 | `D-7` + 41¢
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`D-1` | @14 | 2405.6 Hz | 98.41 | `D-8` + 41¢
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`D#1` | @15 | 4811.2 Hz | 110.41 | `D-9` + 41¢
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val | raw | NTSC | PAL | Dendy | NTSC 5-step | PAL 5-step | Dendy 5-step
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reference: [NESdev](https://www.nesdev.org/wiki/APU_Noise)
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----|----:|------:|------:|------:|------------:|-----------:|-------------:
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00 | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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## length counter table
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01 | 254 | 2.1s | 2.5s | 2.1s | 2.6s | 3.2s | 2.7s
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02 | 20 | 166ms | 200ms | 168ms | 208ms | 250ms | 210ms
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<!-- organized by input value... of little use -->
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03 | 2 | 17ms | 20ms | 17ms | 21ms | 25ms | 21ms
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<!--
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04 | 40 | 333ms | 400ms | 336ms | 417ms | 500ms | 421ms
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value | raw | NTSC | PAL | Dendy | NTSC 5-step | PAL 5-step | Dendy 5-step
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05 | 4 | 33ms | 40ms | 34ms | 42ms | 50ms | 42ms
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-----:|----:|------:|------:|------:|------------:|-----------:|-------------:
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06 | 80 | 667ms | 800ms | 673ms | 833ms | 1.0s | 841ms
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`00` | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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07 | 6 | 50ms | 60ms | 50ms | 63ms | 75ms | 63ms
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`01` | 254 | 2.1s | 2.5s | 2.1s | 2.6s | 3.2s | 2.7s
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08 | 160 | 1.3s | 1.6s | 1.3s | 1.7s | 2.0s | 1.7s
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`02` | 20 | 166ms | 200ms | 168ms | 208ms | 250ms | 210ms
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09 | 8 | 67ms | 80ms | 67ms | 83ms | 100ms | 84ms
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`03` | 2 | 17ms | 20ms | 17ms | 21ms | 25ms | 21ms
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0A | 60 | 500ms | 600ms | 505ms | 625ms | 750ms | 631ms
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`04` | 40 | 333ms | 400ms | 336ms | 417ms | 500ms | 421ms
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0B | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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`05` | 4 | 33ms | 40ms | 34ms | 42ms | 50ms | 42ms
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0C | 14 | 117ms | 140ms | 118ms | 146ms | 175ms | 147ms
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`06` | 80 | 667ms | 800ms | 673ms | 833ms | 1.0s | 841ms
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0D | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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`07` | 6 | 50ms | 60ms | 50ms | 63ms | 75ms | 63ms
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0E | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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`08` | 160 | 1.3s | 1.6s | 1.3s | 1.7s | 2.0s | 1.7s
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0F | 14 | 117ms | 140ms | 118ms | 145ms | 175ms | 147ms
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`09` | 8 | 67ms | 80ms | 67ms | 83ms | 100ms | 84ms
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10 | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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`0A` | 60 | 500ms | 600ms | 505ms | 625ms | 750ms | 631ms
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11 | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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`0B` | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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12 | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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`0C` | 14 | 117ms | 140ms | 118ms | 146ms | 175ms | 147ms
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13 | 18 | 150ms | 180ms | 151ms | 188ms | 225ms | 189ms
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`0D` | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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14 | 48 | 400ms | 480ms | 404ms | 500ms | 600ms | 505ms
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`0E` | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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15 | 20 | 167ms | 200ms | 168ms | 208ms | 250ms | 210ms
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`0F` | 14 | 117ms | 140ms | 118ms | 145ms | 175ms | 147ms
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16 | 96 | 800ms | 960ms | 807ms | 1.0s | 1.2s | 1.0s
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`10` | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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17 | 22 | 183ms | 220ms | 185ms | 229ms | 275ms | 231ms
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`11` | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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18 | 192 | 1.6s | 1.9s | 1.6s | 2.0s | 2.4s | 2.0s
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`12` | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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19 | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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`13` | 18 | 150ms | 180ms | 151ms | 188ms | 225ms | 189ms
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1A | 72 | 600ms | 720ms | 606ms | 750ms | 900ms | 757ms
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`14` | 48 | 400ms | 480ms | 404ms | 500ms | 600ms | 505ms
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1B | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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`15` | 20 | 167ms | 200ms | 168ms | 208ms | 250ms | 210ms
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1C | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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`16` | 96 | 800ms | 960ms | 807ms | 1.0s | 1.2s | 1.0s
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1D | 28 | 233ms | 280ms | 235ms | 292ms | 350ms | 294ms
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`17` | 22 | 183ms | 220ms | 185ms | 229ms | 275ms | 231ms
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1E | 32 | 267ms | 320ms | 269ms | 333ms | 400ms | 336ms
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`18` | 192 | 1.6s | 1.9s | 1.6s | 2.0s | 2.4s | 2.0s
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1F | 30 | 250ms | 300ms | 252ms | 313ms | 375ms | 315ms
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`19` | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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`1A` | 72 | 600ms | 720ms | 606ms | 750ms | 900ms | 757ms
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`1B` | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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`1C` | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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`1D` | 28 | 233ms | 280ms | 235ms | 292ms | 350ms | 294ms
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`1E` | 32 | 267ms | 320ms | 269ms | 333ms | 400ms | 336ms
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`1F` | 30 | 250ms | 300ms | 252ms | 313ms | 375ms | 315ms
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-->
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<!-- organized by resulting times... more useful! -->
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value | raw | NTSC | PAL | Dendy | NTSC 5-step | PAL 5-step | Dendy 5-step
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-----:|----:|------:|------:|------:|------------:|-----------:|-------------:
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`03` | 2 | 17ms | 20ms | 17ms | 21ms | 25ms | 21ms
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`05` | 4 | 33ms | 40ms | 34ms | 42ms | 50ms | 42ms
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`07` | 6 | 50ms | 60ms | 50ms | 63ms | 75ms | 63ms
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`09` | 8 | 67ms | 80ms | 67ms | 83ms | 100ms | 84ms
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`00` | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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`0B` | 10 | 83ms | 100ms | 84ms | 104ms | 125ms | 105ms
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`0D` | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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`10` | 12 | 100ms | 120ms | 101ms | 125ms | 150ms | 126ms
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`0C` | 14 | 117ms | 140ms | 118ms | 146ms | 175ms | 147ms
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`0F` | 14 | 117ms | 140ms | 118ms | 145ms | 175ms | 147ms
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`1C` | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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`11` | 16 | 133ms | 160ms | 135ms | 167ms | 200ms | 168ms
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`13` | 18 | 150ms | 180ms | 151ms | 188ms | 225ms | 189ms
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`02` | 20 | 166ms | 200ms | 168ms | 208ms | 250ms | 210ms
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`15` | 20 | 167ms | 200ms | 168ms | 208ms | 250ms | 210ms
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`17` | 22 | 183ms | 220ms | 185ms | 229ms | 275ms | 231ms
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`12` | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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`19` | 24 | 200ms | 240ms | 202ms | 250ms | 300ms | 252ms
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`0E` | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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`1B` | 26 | 217ms | 260ms | 219ms | 271ms | 325ms | 273ms
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`1D` | 28 | 233ms | 280ms | 235ms | 292ms | 350ms | 294ms
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`1F` | 30 | 250ms | 300ms | 252ms | 313ms | 375ms | 315ms
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`1E` | 32 | 267ms | 320ms | 269ms | 333ms | 400ms | 336ms
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`04` | 40 | 333ms | 400ms | 336ms | 417ms | 500ms | 421ms
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`14` | 48 | 400ms | 480ms | 404ms | 500ms | 600ms | 505ms
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`0A` | 60 | 500ms | 600ms | 505ms | 625ms | 750ms | 631ms
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`1A` | 72 | 600ms | 720ms | 606ms | 750ms | 900ms | 757ms
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`06` | 80 | 667ms | 800ms | 673ms | 833ms | 1.0s | 841ms
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||||||
|
`16` | 96 | 800ms | 960ms | 807ms | 1.0s | 1.2s | 1.0s
|
||||||
|
`08` | 160 | 1.3s | 1.6s | 1.3s | 1.7s | 2.0s | 1.7s
|
||||||
|
`18` | 192 | 1.6s | 1.9s | 1.6s | 2.0s | 2.4s | 2.0s
|
||||||
|
`01` | 254 | 2.1s | 2.5s | 2.1s | 2.6s | 3.2s | 2.7s
|
||||||
|
|
||||||
reference: [NESdev](https://www.nesdev.org/wiki/APU_Length_Counter)
|
reference: [NESdev](https://www.nesdev.org/wiki/APU_Length_Counter)
|
||||||
|
|
||||||
|
## DPCM frequency table
|
||||||
|
|
||||||
|
value | NTSC | PAL
|
||||||
|
------|----------:|----------:
|
||||||
|
`00` | 4181.7Hz | 4177.4Hz
|
||||||
|
`01` | 4709.9Hz | 4696.6Hz
|
||||||
|
`02` | 5264.0Hz | 5261.4Hz
|
||||||
|
`03` | 5593.0Hz | 5579.2Hz
|
||||||
|
`04` | 6257.9Hz | 6023.9Hz
|
||||||
|
`05` | 7046.3Hz | 7044.9Hz
|
||||||
|
`06` | 7919.3Hz | 7917.2Hz
|
||||||
|
`07` | 8363.4Hz | 8397.0Hz
|
||||||
|
`08` | 9419.9Hz | 9446.6Hz
|
||||||
|
`09` | 11186.1Hz | 11233.8Hz
|
||||||
|
`0A` | 12604.0Hz | 12595.5Hz
|
||||||
|
`0B` | 13982.6Hz | 14089.9Hz
|
||||||
|
`0C` | 16884.6Hz | 16965.4Hz
|
||||||
|
`0D` | 21306.8Hz | 21315.5Hz
|
||||||
|
`0E` | 24858.0Hz | 25191.0Hz
|
||||||
|
`0F` | 33143.9Hz | 33252.1Hz
|
||||||
|
|
|
||||||
|
|
@ -1,8 +1,8 @@
|
||||||
# Super Nintendo Entertainment System (SNES)/Super Famicom
|
# Super Nintendo Entertainment System (SNES) / Super Famicom
|
||||||
|
|
||||||
the successor to NES to compete with Genesis, packing superior graphics and sample-based audio.
|
the successor to NES to compete with Genesis, packing superior graphics and sample-based audio.
|
||||||
|
|
||||||
its audio system, developed by Sony, features a DSP chip, SPC700 CPU and 64KB of dedicated SRAM used by both.
|
its Sony-developed audio system features a DSP chip, SPC700 CPU, and 64KB of dedicated SRAM used by both.
|
||||||
this whole system itself is pretty much a separate computer that the main CPU needs to upload its program and samples to.
|
this whole system itself is pretty much a separate computer that the main CPU needs to upload its program and samples to.
|
||||||
|
|
||||||
Furnace communicates with the DSP directly and provides a full 64KB of memory. this memory might be reduced excessively on ROM export to make up for playback engine and pattern data. you can go to window > statistics to see how much memory your samples are using.
|
Furnace communicates with the DSP directly and provides a full 64KB of memory. this memory might be reduced excessively on ROM export to make up for playback engine and pattern data. you can go to window > statistics to see how much memory your samples are using.
|
||||||
|
|
@ -25,55 +25,153 @@ Furnace also allows the SNES to use wavetables (and the wavetable synthesizer) i
|
||||||
- `10xx`: **set waveform.**
|
- `10xx`: **set waveform.**
|
||||||
- `11xx`: **toggle noise mode.**
|
- `11xx`: **toggle noise mode.**
|
||||||
- `12xx`: **toggle echo on this channel.**
|
- `12xx`: **toggle echo on this channel.**
|
||||||
- `13xx`: **toggle pitch modulation.**
|
- `13xx`: **toggle pitch modulation.** frequency modulation by the previous channel's output. no effect on channel 1.
|
||||||
- `14xy`: **toggle inverting the left or right channels.** (x: left, y: right).
|
- `14xy`: **toggle inverting the left or right channels.** `x` is left, `y` is right.
|
||||||
- `15xx`: **set envelope mode.**
|
- `15xx`: **set envelope mode.** see gain chart below for `1` through `5`.
|
||||||
- 0: ADSR.
|
- `0`: ADSR mode.
|
||||||
- 1: gain (direct).
|
- `1`: gain (direct). volume holds at one level.
|
||||||
- 2: linear decrement.
|
- `2`: linear decrement. volume lowers by subtractions of 1/64.
|
||||||
- 3: exponential decrement.
|
- `3`: exponential decrement. volume lowers by multiplications of 255/256.
|
||||||
- 4: linear increment.
|
- `4`: linear increment. volume rises by additions of 1/64.
|
||||||
- 5: bent line (inverse log) increment.
|
- `5`: bent line (inverse log) increment. volume rises by additions of 1/64 until 3/4, then additions of 1/256.
|
||||||
- `16xx`: **set gain.** `00` to `7F` if direct, `00` to `1F` otherwise.
|
- `16xx`: **set gain.** `00` to `7F` if direct, `00` to `1F` otherwise.
|
||||||
- `18xx`: **enable echo buffer.**
|
- `18xx`: **enable echo buffer.**
|
||||||
- `19xx`: **set echo delay.** range is `0` to `F`.
|
- `19xx`: **set echo delay.** range is `0` to `F`.
|
||||||
- `1Axx`: **set left echo channel volume.**
|
- `1Axx`: **set left echo channel volume.**\
|
||||||
- this is a signed number.
|
`1Bxx`: **set right echo channel volume.**\
|
||||||
|
`1Cxx`: **set echo feedback.**
|
||||||
|
- all of these are signed numbers.
|
||||||
- `00` to `7F` for 0 to 127.
|
- `00` to `7F` for 0 to 127.
|
||||||
- `80` to `FF` for -128 to -1.
|
- `80` to `FF` for -128 to -1.
|
||||||
- setting this to -128 is not recommended as it may cause echo output to overflow and therefore click.
|
- setting these to -128 is not recommended as it may cause echo output to overflow and therefore click.
|
||||||
- `1Bxx`: **set right echo channel volume.**
|
- `1Dxx`: **set noise generator frequency.** range is `00` to `1F`. see noise frequencies chart below.
|
||||||
- this is a signed number.
|
- `1Exx`: **set left dry / global volume.**\
|
||||||
- `00` to `7F` for 0 to 127.
|
`1Fxx`: **set right dry / global volume.**
|
||||||
- `80` to `FF` for -128 to -1.
|
- these do not affect echo.
|
||||||
- setting this to -128 is not recommended as it may cause echo output to overflow and therefore click.
|
- `20xx`: **set attack.** range is `0` to `F`.\
|
||||||
- `1Cxx`: **set echo feedback.**
|
`21xx`: **set decay.** range is `0` to `7`.\
|
||||||
- this is a signed number.
|
`22xx`: **set sustain.** range is `0` to `7`.\
|
||||||
- `00` to `7F` for 0 to 127.
|
`23xx`: **set release.** range is `00` to `1F`.
|
||||||
- `80` to `FF` for -128 to -1.
|
- these four are only used in ADSR envelope mode. see ADSR chart below.
|
||||||
- setting this to -128 is not recommended as it may cause echo output to overflow and therefore click.
|
- `30xx`: **set echo filter coefficient 0.**\
|
||||||
- `1Dxx`: **set noise generator frequency.** range is `00` to `1F`.
|
`31xx`: **set echo filter coefficient 1.**\
|
||||||
- `1Exx`: **set left dry / global volume.**
|
`32xx`: **set echo filter coefficient 2.**\
|
||||||
- this does not affect echo.
|
`33xx`: **set echo filter coefficient 3.**\
|
||||||
- `1Fxx`: **set right dry / global volume.**
|
`34xx`: **set echo filter coefficient 4.**\
|
||||||
- this does not affect echo.
|
`35xx`: **set echo filter coefficient 5.**\
|
||||||
- `20xx`: **set attack.** range is `0` to `F`.
|
`36xx`: **set echo filter coefficient 6.**\
|
||||||
- only in ADSR envelope mode.
|
`37xx`: **set echo filter coefficient 7.**
|
||||||
- `21xx`: **set decay.** range is `0` to `7`.
|
|
||||||
- only in ADSR envelope mode.
|
|
||||||
- `22xx`: **set sustain.** range is `0` to `7`.
|
|
||||||
- only in ADSR envelope mode.
|
|
||||||
- `23xx`: **set release.** range is `00` to `1F`.
|
|
||||||
- only in ADSR envelope mode.
|
|
||||||
- `30xx`: **set echo filter coefficient 0.**
|
|
||||||
- `31xx`: **set echo filter coefficient 1.**
|
|
||||||
- `32xx`: **set echo filter coefficient 2.**
|
|
||||||
- `33xx`: **set echo filter coefficient 3.**
|
|
||||||
- `34xx`: **set echo filter coefficient 4.**
|
|
||||||
- `35xx`: **set echo filter coefficient 5.**
|
|
||||||
- `36xx`: **set echo filter coefficient 6.**
|
|
||||||
- `37xx`: **set echo filter coefficient 7.**
|
|
||||||
- all of these are signed numbers.
|
- all of these are signed numbers.
|
||||||
- `00` to `7F` for 0 to 127.
|
- `00` to `7F` for 0 to 127.
|
||||||
- `80` to `FF` for -128 to -1.
|
- `80` to `FF` for -128 to -1.
|
||||||
- _Note:_ Be sure the sum of all coefficients is between -128 and 127. sums outside that may result in overflow and therefore clicking.
|
- _Note:_ Be sure the sum of all coefficients is between -128 and 127. sums outside that may result in overflow and therefore clicking.
|
||||||
|
- see [SnesLab](https://sneslab.net/wiki/FIR_Filter) for a full explanation and examples.
|
||||||
|
|
||||||
|
# tables
|
||||||
|
|
||||||
|
## ADSR
|
||||||
|
|
||||||
|
| attack | 0→1 time | decay | 1→S time | sustain | ratio | release | S→0 time
|
||||||
|
| -----: | -------: | ----: | -------: | ------: | :---: | ------: | -------:
|
||||||
|
| `00` | 4.1 sec | `00` | 1.2 sec | `00` | 1/8 | `00` | ∞
|
||||||
|
| `01` | 2.5 sec | `01` | 740 msec | `01` | 2/8 | `01` | 38 sec
|
||||||
|
| `02` | 1.5 sec | `02` | 440 msec | `02` | 3/8 | `02` | 28 sec
|
||||||
|
| `03` | 1.0 sec | `03` | 290 msec | `03` | 4/8 | `03` | 24 sec
|
||||||
|
| `04` | 640 msec | `04` | 180 msec | `04` | 5/8 | `04` | 19 sec
|
||||||
|
| `05` | 380 msec | `05` | 110 msec | `05` | 6/8 | `05` | 14 sec
|
||||||
|
| `06` | 260 msec | `06` | 74 msec | `06` | 7/8 | `06` | 12 sec
|
||||||
|
| `07` | 160 msec | `07` | 37 msec | `07` | 1 | `07` | 9.4 sec
|
||||||
|
| `08` | 96 msec | | | | | `08` | 7.1 sec
|
||||||
|
| `09` | 64 msec | | | | | `09` | 5.9 sec
|
||||||
|
| `0A` | 40 msec | | | | | `0A` | 4.7 sec
|
||||||
|
| `0B` | 24 msec | | | | | `0B` | 3.5 sec
|
||||||
|
| `0C` | 16 msec | | | | | `0C` | 2.9 sec
|
||||||
|
| `0D` | 10 msec | | | | | `0D` | 2.4 sec
|
||||||
|
| `0E` | 6 msec | | | | | `0E` | 1.8 sec
|
||||||
|
| `0F` | 0 msec | | | | | `0F` | 1.5 sec
|
||||||
|
| | | | | | | `10` | 1.2 sec
|
||||||
|
| | | | | | | `11` | 880 msec
|
||||||
|
| | | | | | | `12` | 740 msec
|
||||||
|
| | | | | | | `13` | 590 msec
|
||||||
|
| | | | | | | `14` | 440 msec
|
||||||
|
| | | | | | | `15` | 370 msec
|
||||||
|
| | | | | | | `16` | 290 msec
|
||||||
|
| | | | | | | `17` | 220 msec
|
||||||
|
| | | | | | | `18` | 180 msec
|
||||||
|
| | | | | | | `19` | 150 msec
|
||||||
|
| | | | | | | `1A` | 110 msec
|
||||||
|
| | | | | | | `1B` | 92 msec
|
||||||
|
| | | | | | | `1C` | 74 msec
|
||||||
|
| | | | | | | `1D` | 55 msec
|
||||||
|
| | | | | | | `1E` | 37 msec
|
||||||
|
| | | | | | | `1F` | 18 msec
|
||||||
|
|
||||||
|
reference: [Super Famicom Development Wiki](https://wiki.superfamicom.org/spc700-reference#dsp-voice-register:-adsr-1097)
|
||||||
|
|
||||||
|
## gain
|
||||||
|
|
||||||
|
value | linear inc. | bent line inc. | linear dec. | exponent dec.
|
||||||
|
----: | ----------: | -------------: | ----------: | ------------:
|
||||||
|
`00` | ∞ | ∞ | ∞ | ∞
|
||||||
|
`01` | 4.1 sec | 7.2 sec | 4.1 sec | 38 sec
|
||||||
|
`02` | 3.1 sec | 5.4 sec | 3.1 sec | 28 sec
|
||||||
|
`03` | 2.6 sec | 4.6 sec | 2.6 sec | 24 sec
|
||||||
|
`04` | 2.0 sec | 3.5 sec | 2.0 sec | 19 sec
|
||||||
|
`05` | 1.5 sec | 2.6 sec | 1.5 sec | 14 sec
|
||||||
|
`06` | 1.3 sec | 2.3 sec | 1.3 sec | 12 sec
|
||||||
|
`07` | 1.0 sec | 1.8 sec | 1.0 sec | 9.4 sec
|
||||||
|
`08` | 770 msec | 1.3 sec | 770 msec | 7.1 sec
|
||||||
|
`09` | 640 msec | 1.1 sec | 640 msec | 5.9 sec
|
||||||
|
`0A` | 510 msec | 900 msec | 510 msec | 4.7 sec
|
||||||
|
`0B` | 380 msec | 670 msec | 380 msec | 3.5 sec
|
||||||
|
`0C` | 320 msec | 560 msec | 320 msec | 2.9 sec
|
||||||
|
`0D` | 260 msec | 450 msec | 260 msec | 2.4 sec
|
||||||
|
`0E` | 190 msec | 340 msec | 190 msec | 1.8 sec
|
||||||
|
`0F` | 160 msec | 280 msec | 160 msec | 1.5 sec
|
||||||
|
`10` | 130 msec | 220 msec | 130 msec | 1.2 sec
|
||||||
|
`11` | 96 msec | 170 msec | 96 msec | 880 msec
|
||||||
|
`12` | 80 msec | 140 msec | 80 msec | 740 msec
|
||||||
|
`13` | 64 msec | 110 msec | 64 msec | 590 msec
|
||||||
|
`14` | 48 msec | 84 msec | 48 msec | 440 msec
|
||||||
|
`15` | 40 msec | 70 msec | 40 msec | 370 msec
|
||||||
|
`16` | 32 msec | 56 msec | 32 msec | 290 msec
|
||||||
|
`17` | 24 msec | 42 msec | 24 msec | 220 msec
|
||||||
|
`18` | 20 msec | 35 msec | 20 msec | 180 msec
|
||||||
|
`19` | 16 msec | 28 msec | 16 msec | 150 msec
|
||||||
|
`1A` | 12 msec | 21 msec | 12 msec | 110 msec
|
||||||
|
`1B` | 10 msec | 18 msec | 10 msec | 92 msec
|
||||||
|
`1C` | 8 msec | 14 msec | 8 msec | 74 msec
|
||||||
|
`1D` | 6 msec | 11 msec | 6 msec | 55 msec
|
||||||
|
`1E` | 4 msec | 7 msec | 4 msec | 37 msec
|
||||||
|
`1F` | 2 msec | 3.5 msec | 2 msec | 18 msec
|
||||||
|
|
||||||
|
reference: [Super Famicom Development Wiki](https://wiki.superfamicom.org/spc700-reference#dsp-voice-register:-gain-1156)
|
||||||
|
|
||||||
|
## noise frequencies
|
||||||
|
|
||||||
|
value | freq. | value | freq.
|
||||||
|
----: | -----: | ----: | -------:
|
||||||
|
`00` | 0 Hz | `10` | 500 Hz
|
||||||
|
`01` | 16 Hz | `11` | 667 Hz
|
||||||
|
`02` | 21 Hz | `12` | 800 Hz
|
||||||
|
`03` | 25 Hz | `13` | 1.0 KHz
|
||||||
|
`04` | 31 Hz | `14` | 1.3 KHz
|
||||||
|
`05` | 42 Hz | `15` | 1.6 KHz
|
||||||
|
`06` | 50 Hz | `16` | 2.0 KHz
|
||||||
|
`07` | 63 Hz | `17` | 2.7 KHz
|
||||||
|
`08` | 83 Hz | `18` | 3.2 KHz
|
||||||
|
`09` | 100 Hz | `19` | 4.0 KHz
|
||||||
|
`0A` | 125 Hz | `1A` | 5.3 KHz
|
||||||
|
`0B` | 167 Hz | `1B` | 6.4 KHz
|
||||||
|
`0C` | 200 Hz | `1C` | 8.0 KHz
|
||||||
|
`0D` | 250 Hz | `1D` | 10.7 KHz
|
||||||
|
`0E` | 333 Hz | `1E` | 16 KHz
|
||||||
|
`0F` | 400 Hz | `1F` | 32 KHz
|
||||||
|
|
||||||
|
reference: [Super Famicom Development Wiki](https://wiki.superfamicom.org/spc700-reference#dsp-register:-flg-1318)
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# resources
|
||||||
|
|
||||||
|
- [SNES-format BRR samples](https://www.smwcentral.net/?p=section&s=brrsamples) at SMW Central
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue