`TStkDrummer`
pt		SetFrequency
pt		GetFrequency
		Create
		Destroy
		NoteOn
		NoteOff
		Tick

`TStkInstrument`
pt		SetFrequency
pt		GetFrequency
		NoteOn
		NoteOff
		Tick

`TStk`
		SetSampleRate
pt		SampleRateChanged
		Create

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