furnace/doc/4-instrument/snes.md

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2023-06-27 21:06:23 +00:00
# SNES instrument editor
these tabs are unique to the editor for SNES instruments.
# SNES
**Use envelope** enables the ADSR volume envelope. if it's on:
- **A**: attack rate.
- **D**: decay rate.
- **S**: sustain level.
- **D2**: decay rate during sustain.
- **R**: release rate.
- **Sustain/release mode**:
- **Direct**: note release acts as note cut.
- **Effective (linear decrease)**: after release, volume lowers by subtractions of 1/64 steps.
- **Effective (exponential decrease)**: after release, volume decays exponentially. see [gain chart](../7-systems/snes.md).
- **Delayed (write R on release)**: after release, waits until A and D have completed before starting exponential decrease.
if envelope is off, select gain mode as described below.
# Macros
- **Volume**: volume.
- **Arpeggio**: pitch in half-steps.
- **Noise Freq**: preset frequency of noise generator.
- **Waveform**: waveform.
- **Panning (left)**: output level of left channel.
- **Panning (right)**: output level of right channel.
- **Pitch**: fine pitch.
- **Special**: bitmap of flags.
- invert left: inverts output of left channel.
- invert right: inverts output of right channel.
- pitch mod: modulates pitch using previous channel's output.
- echo: enables echo.
- noise: enables noise generator.
- **Gain**: sets mode and value of gain.
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- 0 - 127: direct gain from 0 to 127
- 128 - 159: linear gain from -0 to -31
- 160 - 191: exponential gain from -0 to -31
- 192 - 223: linear gain from +0 to +31
- 224 - 255: exponential gain from +0 to +31