Pulse.envelopeStart

• load
• output
• reset
• save
• stepEnvelope
• stepLength
• stepSweep
• stepTimer
• updateSweepTargetPeriod
• writeControl
• writeSweep
• writeTimerHigh
• writeTimerLow

• channel
• dutyMode
• dutyValue
• enabled
• envelopeConstantVolume
• envelopeCounter
• envelopeDivider
• envelopeEnabled
• envelopeLoop
• envelopeStart
• lengthEnabled
• lengthEnabledNewValue
• lengthValue
• lengthValueNew
• lengthValuePrev
• sweepEnabled
• sweepNegate
• sweepPeriod
• sweepReload
• sweepShift
• sweepTargetPeriod
• sweepValue
• timerPeriod
• timerValue