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  #1  
Old 05-23-2013, 04:13 AM
bbbirchey bbbirchey is offline
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Default strange waveform
just got some audio taken off a DA-88. I've attached screenshot of wavefile.
It sounds o.k. but appears odd.Can anyone tell me why it looks like this?
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File Type: jpg Screen shot 2013-05-23 at 12.59.37 PM (2).jpg (49.7 KB, 136 views)
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  #2  
Old 05-23-2013, 06:57 AM
Chief Technician Chief Technician is offline
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Lightbulb Re: strange waveform
It looks like the 2nd channel in the purple waveform is correlated to the channel with the green waveform. The 1st channel in the purple waveform is uncorrelated to the other two channels in your screenshot.

As for why it looks like a modulated triangular wave, I have no idea.
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  #3  
Old 05-23-2013, 05:19 PM
Serge Perron Serge Perron is offline
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Default Re: strange waveform
Quote:
It sounds o.k. but appears odd.Can anyone tell me why it looks like this?
Seeing as there are at least 10 cycles of the noise waveform per subframe, its frequency is 23976 Hz or more, depending on your session frame rate. It sounds OK because that noise signal is inaudible. A low-pass filter may get rid of it.

Serge
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Old 05-24-2013, 01:16 AM
bbbirchey bbbirchey is offline
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Default Re: strange waveform
thank you!
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  #5  
Old 05-24-2013, 01:27 AM
bbbirchey bbbirchey is offline
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Default Re: strange waveform
And thank you Serge! bullseye!
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