Throughout sointu, we assume stereo audiobuffers, but were passing
around []float32. This had several issues, including len(buf)/2 and
numSamples*2 type of length conversion in many places. Also, it
caused one bug in a test case, causing it to succeed when it should
have not (the test had +-1 when it should have had +-2). This
refactoring makes it impossible to have odd length buffer issues.
The yaml marshaling and umarshaling seems to allocate a lot of memory. When saving the recovery file, the memory use jumped up by hundreds of megabytes. Switch to using json marshaling for the recovery file, as it does waste memory so badly. Binary marshaling was also an option, but its nice in emergency situations that the user can glance the recovery file and perhaps, with some effort, recover stuff from it. Json is good enough for manual recovery during emergency situations.
The options are stereo, left and right. Similar to oscillator sample settings, if you tamper with these, it starts to show "custom". Used some of the generic features of go1.18, so had to update go.mod to require go1.18.
The "auto" was misleading, as it meant self modulation when targetting a unit within instrument itself and just voice 0 when cross-instrument modulation. This feature changes the "auto" meaning "self" for instruments self-modulating, and "all" voices for cross-instrument modulations. "all" is implemented by compiling a single send into multiple repeated sends, with only the last popping the stack (if necessary).
Closes#107
BREAKING CHANGE: The problem with crush was that it had very few usable values. This changes the crush to map the value nonlinearly, so the crush resolution is bits. Still the upper portion of the values is not very usable (bits 12-24 i.e. hardly any crushing), but at least the lower portion is usable. But now crush resolution has slightly different meaning.
Specifically:
* Added win32, elf32 and elf64 asm player and wav writers using winmm.
* Added dsound player in C.
* Separated the ALL target and the examples; introduced a new examples target.
go v1.21 is more strict about giving methods to C.structs and was complaining about "cannot define new methods on non-local type *C.Synth". The solution was a local type alias: type BridgeSynth C.Synth
