Addendum: Turning off keytrrack on Osc 1 (so it’s a constant ‘pitch’) and dropping it down as low as possible is rather instructive – the note comes in and out like an arpeggio, as its amplitude is zilched out on the downswing and increased on the up. This is why the ring mod kills the sound when the pulse width is all the way left (when the pulse is always down), and does nothing when it’s all the way right (when it’s always up).
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