Wednesday, September 16, 2009
SHIOITOR Oscillator - alias free
YouTube via d16group
"SHIOITOR oscillator output (sawtooth) sweep from 6kHz up to 22kHz without aliasing!!!"
Update:
Other synths oscillators comparison - sawtooth wave
"We've captured here other synthesisers spectrum - You can compare this with SHIOITORs oscillators."
4 comments:
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MATRIXSYNTH - EVERYTHING SYNTH
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MATRIXSYNTH - EVERYTHING SYNTH
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This video clearly shows there actually IS aliasing present. As the harmonic partials move up in frequency, the highest partial gets reflected from the Nyquist frequency and folds back to the audible range and shifts in the opposite direction.
ReplyDelete/\ Sure, but the aliased partial is already below -65dB by the time it reaches 20kHz, and it's all but gone at 10k. That represents rather good antialiasing.
ReplyDeleteBut I can see from the scale it's rather at -45dB, and the strongest partial is -10dB, so it is only 35dB difference.
ReplyDeleteit's at -45dB at 22kHz, -65 at 20kHz, and gone at 18kHz (which is what I meant when I said 10k). Again I don't see your basis for argument...
ReplyDeleteI want to see some theory behind this synthesis. I suspect minblep or blit with very high oversampling. And I want to see how this behaves under audio rate fm. One clinical video shows nothing about an oscillator's true performance.