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furnace/doc/3-pattern/effects.md
Electric Keet 064aec95ba Nevermind those HR's. 
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# effect list
most of the effect numbers are from ProTracker / FastTracker 2.
however, effects are continuous, which means you only need to type it once and then stop it with an effect value of `00` or no effect value at all.
## volume
- `0Axy`: **Volume slide.**
- If `x` is 0 then this slides volume down by `y` each tick.
- If `y` is 0 then this slides volume up by `x` each tick.
- `FAxy`: **Fast volume slide.** same as `0Axy` above but 4× faster.
- `F3xx`: **Fine volume slide up.** same as `0Ax0` but 64× slower.
- `F4xx`: **Fine volume slide down.** same as `0A0x` but 64× slower.
- `F8xx`: **Single tick volume slide up.** adds `x` to volume on first tick only.
- `F9xx`: **Single tick volume slide down.** subtracts `x` from volume on first tick only.
- `07xy`: **Tremolo.** changes volume to be "wavy" with a sine LFO. `x` is the speed. `y` is the depth.
- Tremolo is downward only.
- Maximum tremolo depth is -60 volume steps.
## pitch
- `E5xx`: **Set pitch.** `00` is -1 semitone, `80` is base pitch, `FF` is nearly +1 semitone.
- `01xx`: **Pitch slide up.**
- `02xx`: **Pitch slide down.**
- `F1xx`: **Single tick pitch slide up.**
- `F2xx`: **Single tick pitch slide down.**
- `03xx`: **Portamento.** slides the current note's pitch to the specified note. `x` is the slide speed.
- A note _must_ be present for this effect to work.
- `E1xy`: **Note slide up.** `x` is the speed, while `y` is how many semitones to slide up.
- `E2xy`: **Note slide down.** `x` is the speed, while `y` is how many semitones to slide down.
- `EAxx`: **Toggle legato.** while on, notes instantly change the pitch of the currrently playing sound instead of starting it over.
- `00xy`: **Arpeggio.** after using this effect the channel will rapidly switch between semitone values of `note`, `note + x` and `note + y`.
- `E0xx`: **Set arpeggio speed.** this sets the number of ticks between arpeggio values. default is 1.
- `04xy`: **Vibrato.** changes pitch to be "wavy" with a sine LFO. `x` is the speed, while `y` is the depth.
- Maximum vibrato depth is ±1 semitone.
- `E3xx`: **Set vibrato direction.** `xx` may be one of the following:
- `00`: Up and down. default.
- `01`: Up only.
- `02`: Down only.
- `E4xx`: **Set vibrato range** in 1/16th of a semitone.
## panning
not all chips support these effects.
- `08xy`: **Set panning.** changes stereo volumes independently. `x` is the left channel and `y` is the right one.
- `88xy`: **Set rear panning.** changes rear channel volumes independently. `x` is the rear left channel and `y` is the rear right one.
- `81xx`: **Set volume of left channel** (from `00` to `FF`).
- `82xx`: **Set volume of right channel** (from `00` to `FF`).
- `89xx`: **Set volume of rear left channel** (from `00` to `FF`).
- `8Axx`: **Set volume of rear right channel** (from `00` to `FF`).
- `80xx`: **Set panning (linear).** this effect behaves more like other trackers:
- `00` is left.
- `80` is center.
- `FF` is right.
## time
- `09xx`: **Set speed/groove.** if no grooves are defined, this sets speed. If alternating speeds are active, this sets the first speed.
- `0Fxx`: **Set speed 2.** during alternating speeds or a groove, this sets the second speed.
- `Cxxx`: **Set tick rate.** changes tick rate to `xxx` Hz (ticks per second).
- `xxx` may be from `000` to `3FF`.
- `F0xx`: **Set BPM.** changes tick rate according to beats per minute. range is `01` to `FF`.
- `0Bxx`: **Jump to order.** `x` is the order to play after the current row.
- this marks the end of a loop with order `x` as the loop start.
- `0Dxx`: **Jump to next pattern.** skips the current row and remainder of current order.
- this can be used to shorten the current order.
- `FFxx`: **Stop song.** stops playback and ends the song. `x` is ignored.
## note
- `0Cxx`: **Retrigger.** repeats current note every `xx` ticks.
- This effect is not continuous; it must be entered on every row.
- `ECxx`: **Note cut.** ends current note after `xx` ticks. For FM instruments, it's equivalent to a "key off".
- `EDxx`: **Note delay.** delays note by `x` ticks.
## other
- `9xxx`: **Set sample position.** jumps current sample to position `xxx \* 0x100`.
- Not all chips support this effect.
- `EBxx`: **Set sample bank.**
- Does not apply on Amiga.
- `EExx`: **Send external command.**
- This effect is currently incomplete.
- `F5xx`: **Disable macro.** see macro table at the end of this document for possible values.
- `F6xx`: **Enable macro.**
additionally, [each chip has its own effects](../7-systems/README.md).
## macro table
ID | macro
---|-----------------------------
00 | volume
01 | arpeggio
02 | duty/noise
03 | waveform
04 | pitch
05 | extra 1
06 | extra 2
07 | extra 3
08 | extra A (ALG)
09 | extra B (FM)
0A | extra C (FMS)
0B | extra D (AMS)
0C | panning left
0D | panning right
0E | phase reset
0F | extra 4
10 | extra 5
11 | extra 6
12 | extra 7
13 | extra 8
| | **operator 1 macros**
20 | AM
21 | AR
22 | DR
23 | MULT
24 | RR
25 | SL
26 | TL
27 | DT2
28 | RS
29 | DT
2A | D2R
2B | SSG-EG
2C | DAM
2D | DVB
2E | EGT
2F | KSL
30 | SUS
31 | VIB
32 | WS
33 | KSR
40 | **operator 2 macros**
60 | **operator 3 macros**
80 | **operator 4 macros**
the interpretation of duty, wave and extra macros depends on chip/instrument type:
ex | FM | OPM | OPZ | OPLL | AY-3-8910 | AY8930 | Lynx | C64 | SAA1099 | X1-010 | Namco 163 | FDS | Sound Unit | ES5506 | MSM6258 | QSound | SNES | MSM5232 |
---|--------|-----------|-----------|-------|------------|------------|----------|------------|----------|------------|------------|-----------|------------|-----------|----------|--------------|-----------|-----------|
D | NoiseF | NoiseFreq | | | NoiseFreq | NoiseFreq | Duty/Int | Duty | | | Wave Pos | | Duty | Filt Mode | FreqDiv | Echo Level | NoiseFreq | GroupCtrl |
W | | LFO Shape | LFO Shape | Patch | Waveform | Waveform | | Waveform | Waveform | Waveform | Waveform | Waveform | Waveform | | | | Waveform | |
1 | | AMD | AMD | | | Duty | | FilterMode | Envelope | EnvMode | WaveLen | Mod Depth | Cutoff | Filter K1 | ClockDiv | EchoFeedback | Special | GroupAtk |
2 | | PMD | PMD | | Envelope | Envelope | | Resonance | | Envelope | WaveUpdate | Mod Speed | Resonance | Filter K2 | | Echo Length | Gain | GroupDec |
3 | LFOSpd | LFO Speed | LFO Speed | | AutoEnvNum | AutoEnvNum | | Special | | AutoEnvNum | WaveLoad W | | Control | Env Count | | | | Noise |
A | ALG | ALG | ALG | | AutoEnvDen | AutoEnvDen | | | | AutoEnvDen | WaveLoad P | | | Control | | | | |
B | FB | FB | FB | | | Noise AND | | | | | WaveLoad L | | | | | | | |
C | FMS | FMS | FMS | | | Noise OR | | | | | WaveLoad T | | | | | | | |
D | AMS | AMS | AMS | | | | | | | | | | | | | | | |
4 | OpMask | OpMask | | | | | | Test/Gate | | | | | PResetTime | EnvRampL | | | | |
5 | | | AMD2 | | | | | | | | | | | EnvRampR | | | | |
6 | | | PMD2 | | | | | | | | | | | EnvRampK1 | | | | |
7 | | | LFO2Speed | | | | | | | | | | | EnvRampK2 | | | | |
8 | | | LFO2Shape | | | | | | | | | | | Env Mode | | | | |
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