mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-18 10:35:11 +00:00
138 lines
6.6 KiB
Markdown
138 lines
6.6 KiB
Markdown
# samples
|
|
|
|
In the context of Furnace, a sound sample (usually just referred to as a sample) is a string of numbers that represent sampled PCM audio.
|
|
|
|
In Furnace, these samples can be generated by importing a .wav (think of it as an higher quality MP3) file.
|
|
|
|
## supported chips
|
|
|
|
the following sound chips have sample support:
|
|
|
|
- NES/Ricoh 2A03 (with DPCM support and only on channel 5)
|
|
- Sega Genesis/YM2612 (channel 6 only)
|
|
- PC Engine/TurboGrafx-16/HuC6280
|
|
- Amiga/Paula
|
|
- SegaPCM
|
|
- NEC PC-9801/YM2608 (ADPCM channel only)
|
|
- Neo Geo/Neo Geo CD/YM2610 (ADPCM channels only)
|
|
- Seta/Allumer X1-010
|
|
- Atari Lynx
|
|
- MSM6258 and MSM6295
|
|
- YMU759/MA-2 (last channel only)
|
|
- QSound
|
|
- ZX Spectrum 48k (1-bit)
|
|
- RF5C68
|
|
- SNES/S-DSP
|
|
- WonderSwan (second channel only)
|
|
- tildearrow Sound Unit
|
|
- VERA (last channel only)
|
|
- Y8950 (last channel only)
|
|
- Konami K007232
|
|
- Irem GA20
|
|
- Ensoniq OTTO/ES5506
|
|
- Yamaha PCMD8/YMZ280B
|
|
- MMC5 (last channel only)
|
|
- SNES/S-DSP
|
|
|
|
## compatible sample mode
|
|
|
|
effect `17xx` enables/disables compatible sample mode whether supported (e.g. on Sega Genesis or PC Engine).
|
|
|
|
in this mode, samples are mapped to notes in an octave from C to B, allowing you to use up to 12 samples.
|
|
if you need to use more samples, you may change the sample bank using effect `EBxx`.
|
|
|
|
use of this mode is discouraged in favor of Sample type instruments.
|
|
|
|
## notes
|
|
|
|
due to limitations in some of those sound chips, some restrictions exist:
|
|
|
|
- Amiga: sample lengths and loop will be set to an even number, and your sample can't be longer than 131070.
|
|
- NES: if on DPCM mode, only a limited selection of frequencies is available, and loop position isn't supported (only entire sample).
|
|
- SegaPCM: your sample can't be longer than 65535, and the maximum frequency is 31.25KHz.
|
|
- QSound: your sample can't be longer than 65535, and the loop length shall not be greater than 32767.
|
|
- Neo Geo (ADPCM-A): no looping supported. your samples will play at 18.518KHz.
|
|
- Neo Geo (ADPCM-B): no loop position supported (only entire sample), and the maximum frequency is 55.555KHz.
|
|
- YM2608: the maximum frequency is 55.555KHz.
|
|
- MSM6258/MSM6295: no arbitrary frequency.
|
|
- ZX Spectrum Beeper: your sample can't be longer than 2048, and it always plays at ~55KHz.
|
|
- Seta/Allumer X1-010: frequency resolution is terrible in the lower end. your sample can't be longer than 131072.
|
|
|
|
furthermore, many of these chips have a limited amount of sample memory. check memory usage in window > statistics.
|
|
|
|
# the sample editor
|
|
|
|
you can actually tweak your samples in Furnace's sample editor, which can be accessed by clicking on `window` (at the top of the screen) then clicking on `sample editor`.
|
|
|
|
the changes you make will be applied as soon as you've committed them to your sample, but they can be undone and redone, just like text.
|
|
|
|
in there, you can modify certain data pertaining to your sample, such as the:
|
|
- volume of the sample in percentage, where 100% is the current level of the sample (note that you can distort it if you put it too high)
|
|
- the sample rate.
|
|
- what frequencies to filter, along with filter level/sweep and resonance options (much like the C64)
|
|
- and many more.
|
|
|
|
|
|
|
|
- top-left drop-down box: sample slot.
|
|
- **Open**: replaces current sample.
|
|
- **Save**: saves current sample to disk.
|
|
- **Name**: name in sample list.
|
|
- button to left of **Info**: collapses and expands the info bar.
|
|
- **Type**: sample format. only 8-bit and 16-bit PCM samples are editable. selecting a format converts the sample data.
|
|
- **BRR emphasis**: boosts higher frequencies to compensate for the SNES low-pass filter. should not be enabled for BRR-type samples.
|
|
|
|
- **Rate**: switches to normal rate values.
|
|
- **Compat Rate**: switches to DefleMask-compatible rate values for sample mapping.
|
|
- **Hz**: base frequency of sample played at `C-4`.
|
|
- **Note**: note corresponding to Hz.
|
|
- **Fine**: fine tuning. ranges from -64 to 63, which maps to -1 to almost +1 semitone.
|
|
|
|
- **Loop**: enable or disable sample loop. only on supported chips.
|
|
- **Mode**: direction of loop. backward and ping pong loops are only natively available on some chips; on others, loop will be automatically unrolled as needed.
|
|
- **Start**: start of loop.
|
|
- **End**: end of loop.
|
|
|
|
- **Chips:** set assignment to chips and sample banks.
|
|
- sample will only be uploaded to selected chips.
|
|
- columns correspond to chips in use.
|
|
- rows correspond to sample banks.
|
|
|
|
|
|
|
|
- **Edit mode: Select**: cursor selects portion of sample.
|
|
- **Edit mode: Draw**: cursor draws over wave.
|
|
- **Resize**: stretches sample. pops up a dialog to type new length.
|
|
- **Resample**: stretches sample. pops up a dialog box:
|
|
- **Rate**: new sample rate.
|
|
- **0.5x**: halves sample rate.
|
|
- **==**: returns to original sample rate.
|
|
- **2.0x**: doubles sample rate.
|
|
- **Factor**: multiplier of original sample rate.
|
|
- **Filter**: selects interpolation filter for resampling.
|
|
- **Undo**: undoes previous edit.
|
|
- **Redo**: redoes undone edit.
|
|
- **Amplify**: changes amplitude of selection. pops up a dialog to type amount.
|
|
- **Normalize**: adjusts amplitude of selection to maximum without clipping.
|
|
- **Fade in**: ramp amplitude of selection from 0 to original.
|
|
- **Fade in**: ramp amplitude of selection from original to 0.
|
|
- **Insert silence**: inserts silence. pops up a dialog to type length.
|
|
- **Apply silence**: reduces amplitude of selection to 0.
|
|
- **Delete**: removes selection.
|
|
- **Trim**: removes all but selection.
|
|
- **Reverse**: reverses direction of selection.
|
|
- **Invert**: flips selection "vertically".
|
|
- **Signed/unsigned exchange**: reinterprets selection data as being of the opposite sign. if a sample sounds fine elsewhere but is distorted on import, it may have been interpreted as signed when it should be unsigned, or vice versa; this will correct that.
|
|
- **Apply filter**: filters the selection. pops up a dialog box:
|
|
- **From**: filter cutoff frequency at start of selection.
|
|
- **To**: filter cutoff frequency at end of selection.
|
|
- **Resonance**: emphasizes frequencies around filter cutoff.
|
|
- **Power**: number of times resonance is applied.
|
|
- **Low-pass**: amount to attenuate everything above cutoff.
|
|
- **Band-pass**: amount to attenuate everything outside cutoff.
|
|
- **High-pass**: amount to attenuate everything below cutoff.
|
|
- **Preview sample**: plays sample at base frequency.
|
|
- **Stop sample preview**: stops preview.
|
|
- **Create instrument from sample**: creates a new instrument with its initial sample set to the current sample.
|
|
- **Zoom**: shows and sets sample view zoom level.
|
|
- **Zoom mode**: switches between "Auto" (entire sample fits in window) and "100%" (each horizontal pixel represents one sample point).
|