NSErr enum<int16> {
  nsAlreadyInit = $1901,
  nsSndNotInit = $1902,
  nsNotAvail = $1921,
  nsBadGenNum = $1922,
  nsNotInit = $1923,
  nsGenAlreadyOn = $1924,
  soundWrongVer = $1925,
}

EnvelopeHndl = ^EnvelopePtr;
EnvelopePtr = ^Envelope;
Envelope struct {
  st1BkPt: uint8;
  st1Increment: int16;
  st2BkPt: uint8;
  st2Increment: int16;
  st3BkPt: uint8;
  st3Increment: int16;
  st4BkPt: uint8;
  st4Increment: int16;
  st5BkPt: uint8;
  st5Increment: int16;
  st6BkPt: uint8;
  st6Increment: int16;
  st7BkPt: uint8;
  st7Increment: int16;
  st8BkPt: uint8;
  st8Increment: int16;
}

WaveFormHndl = ^WaveFormPtr;
WaveFormPtr = ^WaveForm;
WaveForm struct {
  wfTopKey: uint8;
  wfWaveAddress: uint8;
  wfWaveSize: uint8;
  wfDocMode: uint8;
  wfRelPitch: int16;
}

InstrumentHndl = ^InstrumentPtr;
InstrumentPtr = ^Instrument;
Instrument struct {
  theEnvelope: Envelope;
  releaseSegment: uint8;
  priorityIncrement: uint8;
  pitchBendRange: uint8;
  vibratoDepth: uint8;
  vibratoSpeed: uint8;
  inSpare: uint8;
  aWaveCount: uint8;
  bWaveCount: uint8;
  aWaveList: WaveForm[];
  bWaveList: WaveForm[];
}

NSBootInit() {
  $19, $01
}
NSStartUp(updateRate: int16, userUpdateRtnPtr: Ptr) {
  $19, $02
}
NSShutDown() {
  $19, $03
}
NSVersion(): int16 {
  $19, $04
}
NSReset() {
  $19, $05
}
NSStatus(): bool {
  $19, $06
}
AllNotesOff() {
  $19, $0d
}
AllocGen(requestPriority: int16): int16 {
  $19, $09
}
DeallocGen(genNumber: int16) {
  $19, $0a
}
NoteOff(genNumber: int16, semitone: int16) {
  $19, $0c
}
NoteOn(genNumber: int16, semitone: int16, volume: int16,
  instrumentPtr: ^Instrument) {
  $19, $0b
}
NSSetUpdateRate(updateRate: int16) {
  $19, $0e
}
NSSetUserUpdateRgn(updateRtn: VoidProcPtr): VoidProcPtr {
  $19, $0f
}