NesLengthCounter
StructSource: AudioTypes.h
Description
NES APU length counter state for a single voice.
The length counter is a half-frame clocked countdown. Once loaded (via ApuCore::setVoiceNesLength) it decrements at ~120 Hz (mode 0) or ~96 Hz (mode 1). When the counter reaches 0, the voice is silenced directly. While halt is set, the counter is frozen (does not decrement).
The enabled field mirrors the NES channel enable bit ($4015): when clear, the counter is forced to 0 and the voice is silenced. When set, the counter can be loaded and decremented.
Default state: enabled=false, counter=0, halt=false. SINE/SAW voices keep enabled=false permanently and are unaffected by the dispatch loop. Hito 2 M4.