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belangeo / pyo

Python DSP module
GNU Lesser General Public License v3.0
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FreqShift is backwards #193

Closed ultrasound1372 closed 3 years ago

ultrasound1372 commented 4 years ago

So as far as I can tell, the shift value in FreqShift is actually backwards. Negative frequencies seem to rise, while positive ones first wrap past 0 and then into negatives, rising there. I've tested this with a sine wave input at 500 Hz, setting the shift value to -500 and to 500, with SigTo. I noticed that when it went from 0 to 500 it went down to 0, when it should have been going up to 1000, as -500 does. Perhaps you're using the wrong sideband?

belangeo commented 3 years ago

Fixed!

belangeo commented 3 years ago

Fixed in version 1.0.4.