Solitude Posted March 25, 2010 Share Posted March 25, 2010 I know this will sound lame (and yes i looked!)... I've been experimenting with chops lately, and can't seem to find a help doc for the pitch chop... anybody know where it might be hiding? Quote Link to comment Share on other sites More sharing options...
Nibbler Posted March 25, 2010 Share Posted March 25, 2010 http://www.derivative.ca/wiki/index.php?title=Pitch_CHOP "The Pitch CHOP returns the frequency and the volume of the incoming channel." Quote Link to comment Share on other sites More sharing options...
Solitude Posted March 25, 2010 Author Share Posted March 25, 2010 http://www.derivative.ca/wiki/index.php?title=Pitch_CHOP "The Pitch CHOP returns the frequency and the volume of the incoming channel." lol... well I figured that much out. I've actually got a grip on it (for what I'm doing anyway), and ran into a bug that I though was user error in the pitch chop.. turns out the ch() expressions pointing to my chop aren't updating properly. I need to go to my rename chop, change from the correct chan[0-127] to cha[0-127] let it evaluate, and then rename back to chan[0-127] and then the scene is ok. I'm going to submit a bug report to sesi later... Quote Link to comment Share on other sites More sharing options...
Nibbler Posted March 26, 2010 Share Posted March 26, 2010 "This CHOP is like OCR for waveforms. It will attempt to to detect the dominant pitch in a stream of audio, and synthetically output the detected stripped-down fun- damental pitch. It thus recreates the input pitch, and discards all the detail. It also operates in a second mode which allows you to Þnd the power contribution of individual frequency bands (i.e. the output ouput of a spectrum analyser) over time. This makes it useful for things like audio generation, or for detecting frequencies within audio. For example, it could be used when you're animating a character, and you want your character to automatically raise an eyebrow everytime the pitch of its voice goes above a certain level (just append a Trigger CHOP after the Pitch CHOP)." ,lucky for us all there is a: http://digitalcinemaarts.com/docs/houdini/ , with older tutorials and docs, the quote above is from: Channels.fmk.pdf Quote Link to comment Share on other sites More sharing options...
Solitude Posted March 26, 2010 Author Share Posted March 26, 2010 "This CHOP is like OCR for waveforms. It will attempt to to detect the dominant pitch in a stream of audio, and synthetically output the detected stripped-down fun- damental pitch. It thus recreates the input pitch, and discards all the detail. It also operates in a second mode which allows you to Þnd the power contribution of individual frequency bands (i.e. the output ouput of a spectrum analyser) over time. This makes it useful for things like audio generation, or for detecting frequencies within audio. For example, it could be used when you're animating a character, and you want your character to automatically raise an eyebrow everytime the pitch of its voice goes above a certain level (just append a Trigger CHOP after the Pitch CHOP)." ,lucky for us all there is a: http://digitalcinemaarts.com/docs/houdini/ , with older tutorials and docs, the quote above is from: Channels.fmk.pdf Sweet. Thx! Quote Link to comment Share on other sites More sharing options...
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