Cycling 74 » Topic: Play a 192kHz file at 44.11kHz http://cycling74.com/forums/topic/play-a-192khz-file-at-44-11khz/feed Thu, 20 Jun 2013 03:04:45 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/play-a-192khz-file-at-44-11khz/#post-58972 <![CDATA[Play a 192kHz file at 44.11kHz]]> http://cycling74.com/forums/topic/play-a-192khz-file-at-44-11khz/#post-58972 Wed, 21 Sep 2011 14:12:10 +0000 auto-lock Hi, could some one hint me in the correct direction please.

I would like to play 192kHz files at 44.1kHz in MAX/MSP

i am assuming playback should be slower because it is played back as if it were 44.1 ?

]]> http://cycling74.com/forums/topic/play-a-192khz-file-at-44-11khz/#post-211849 <![CDATA[Re: Play a 192kHz file at 44.11kHz]]> http://cycling74.com/forums/topic/play-a-192khz-file-at-44-11khz/#post-211849 Thu, 22 Sep 2011 20:51:57 +0000 AlexHarker If you using groove~ / play~ / sfplay~ they should be aware of the difference in sampling rate, and compensate accordingly. However, you may hear aliasing from the frequencies above the nyquist (SR/2 = 44100 / 2 = 22050Hz) wrapping back into the audible range.

Unfortunately solving this problem is not so easy. The way to do it is to play the file in an upsampled poly~ (probably about 4 times upsampled), lowpass filter the result (within the poly~) to remove the frequencies that are too high, and then passing the result out of the poly~ where it will be downsampled.

HTH

Alex

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