electronic design for sound synthesis
Friday 3 February 2012
LFO Auxiliary Sine and Sync
Just for the record, here are scope shots of the Aux LFO sine output. The first shot shows the basic diode-shaped sine wave:
Clearly not a perfect sine, but the distortion is down to around 1% THD. Not hi-fi grade but certainly useful for modulation purposes.
The second shot shows the same sine wave but sync'ed to the positive edge of an external square wave:
The sync circuit is designed to reset the auxiliary oscillator to the 0 degree starting point. With the switch in the NEG position the oscillator is reset by the falling edge of the square wave.
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