private Int32 ALFO_Step(_LFO LFO)
{
Int32 p;
LFO.phase += (UInt16)LFO.phase_step;
p = LFO.table[(LFO.phase >> LFO_SHIFT) & 0xff];
p = LFO.scale[p];
return(p << (SHIFT - LFO_SHIFT));
}
private void LFO_ComputeStep(_MultiPCM ptChip, _LFO LFO, UInt32 LFOF, UInt32 LFOS, Int32 ALFO)
{
float step = (float)(LFOFreq[LFOF] * 256.0 / (float)ptChip.Rate);
LFO.phase_step = (UInt32)((float)(1 << LFO_SHIFT) * step);
if (ALFO != 0)
{
LFO.table = ALFO_TRI;
LFO.scale = ASCALES[LFOS];
}
else
{
LFO.table = PLFO_TRI;
LFO.scale = PSCALES[LFOS];
}
}
