15 lines
		
	
	
		
			537 B
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			15 lines
		
	
	
		
			537 B
		
	
	
	
		
			Markdown
		
	
	
	
	
	
# Sega PSG instrument editor
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The instrument editor for Sega PSG (SMS, and other TI SN76489 derivatives) consists of these macros:
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- **Volume**: volume.
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- **Arpeggio**: pitch in half-steps.
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- **Duty**: noise mode.
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  - `0`: short noise, preset frequencies.
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  - `1`: long noise, preset frequencies.
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  - `2`: short noise, use channel 3 for frequency.
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  - `3`: long noise, use channel 3 for frequency.
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- **Panning**: output for left and right channels.
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- **Pitch**: fine pitch.
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- **Phase Reset**: trigger restart of waveform.
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