102 lines
4.3 KiB
Markdown
102 lines
4.3 KiB
Markdown
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# ESS ESFM
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an enhanced version of Yamaha's OPL3, adding many features which weren't present on the original chip, such as 4-op on all channels, coarse/fine detune, per-op panning, envelope delay, noise generator and advanced modulation routing (no more algorithms!).
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the technology was present in many of ESS' sound cards (the ES1xxx series in particular).
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## effects
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- `10xy`: **set AM depth.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is either `0` (1dB, shallow) or `1` (4.8dB, deep).
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- `12xx`: **set operator 1 level.**
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- `13xx`: **set operator 2 level.**
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- `14xx`: **set operator 3 level.**
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- `15xx`: **set operator 4 level.**
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- `16xy`: **set multiplier of operator.**
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- `x` is the operator (1-4).
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- `y` is the new MULT value..
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- `17xy`: **set vibrato depth.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is either `0` (normal) or `1` (double).
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- `19xx`: **set attack of all operators.**
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- `1Axx`: **set attack of operator 1.**
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- `1Bxx`: **set attack of operator 2.**
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- `1Cxx`: **set attack of operator 3.**
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- `1Dxx`: **set attack of operator 4.**
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- `20xy`: **set panning of operator 1.**
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- `x` determines whether to output on left.
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- `y` determines whether to output on right.
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- `21xy`: **set panning of operator 2.**
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- `x` determines whether to output on left.
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- `y` determines whether to output on right.
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- `22xy`: **set panning of operator 3.**
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- `x` determines whether to output on left.
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- `y` determines whether to output on right.
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- `23xy`: **set panning of operator 4.**
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- `x` determines whether to output on left.
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- `y` determines whether to output on right.
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- `24xy`: **set output level of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `25xy`: **set modulation input level of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `26xy`: **set envelope delay of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `27xx`: **set operator 4 noise mode.**
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- `0`: noise off
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- `1`: square + noise
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- `2`: ring mod from operator 3 + noise
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- `3`: ring mod from operator 3 + double pitch modulation input
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- note: emulation issues. subject to change!
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- `2Axy`: **set waveform of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `2Exx`: **enable envelope hard reset.**
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- `2Fxy`: **set fixed frequency block (octave).**
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- `x` is the operator from 1 to 4.
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- `y` is the block/octave from 0 to 7.
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- `3xyy`: **set fixed frequency f-num.**
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- `x` contains operator number and high bits of f-num may be any of the following:
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- `0` to `3` for operator 1
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- `4` to `7` for operator 2
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- `8` to `B` for operator 3
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- `C` to `F` for operator 4
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- `y` are the lower bits of f-num.
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- `40xx`: **set operator 1 detune.**
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- `41xx`: **set operator 1 detune.**
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- `42xx`: **set operator 1 detune.**
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- `43xx`: **set operator 1 detune.**
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- `50xy`: **set AM of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` determines whether AM is on.
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- `51xy`: **set SL of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `52xy`: **set RR of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `53xy`: **set VIB of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` determines whether VIB is on.
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- `54xy`: **set KSL of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` is the value.
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- `55xy`: **set SUS of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` determines whether SUS is on.
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- `56xx`: **set DR of all operators.**
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- `57xx`: **set DR of operator 1.**
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- `58xx`: **set DR of operator 2.**
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- `59xx`: **set DR of operator 3.**
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- `5Axx`: **set DR of operator 4.**
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- `5Bxy`: **set KSR of operator.**
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- `x` is the operator from 1 to 4. a value of `0` means "all operators".
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- `y` determines whether KSR is on.
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## info
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this chip uses the [FM (ESFM)](../4-instrument/fm-esfm.md) instrument editor.
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