On 2/26/14 10:50 AM, Tobias Münzer wrote:
an easy fix to avoid this kind of phase jitter is to add the fractional part of the master oscillator after the zero crossing to the slave. Basically: Do not reset the slave to zero, but to the fractional rest of the master.
the simplest thing, if you want the slave perfectly locked to the master, is to derive both master and slave phase from the very same phase accumulator. there might be scaling and wrap around, but that should be easy.
for a slave doing a sine, i wonder what you would expect to hear as the master/slave frequency ratio changes. while i have heard sync saws and sync squares, i don't think i ever heard a sync sine and it would seem to me to go from no harmonics to lotsa harmonics pretty abruptly. once all those harmonics are in, i wonder if it would matter much that the basic waveform was a sine or something else.
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