Raw Audio with digital noise

pyrisurfer · 13th May 2016, 14:14

I've got what seems to be a raw Audio file (48 kHz, 16-Bit, Little Endian). When I import it with Audacity however, I get a constant digital noise throuout the file.

The file can be correctly imported by the Software which created it, so it is not inherently broken. Unfortunately, that Software does not support any other lossless audio export, so I need to somehow get it to work externally.

Sample: http://www109.zippyshare.com/v/UxscLBpC/file.html

raffriff42 · 13th May 2016, 15:05

Seems to have embedded sync word or something, consisting of the eight bytes
65("A"), 72("H"), 80("P"), 48("0"), 128, 07, 00, 00
at offsets 8 + 1928 * n

Which sounds like a 50Hz buzz...

Filter those things out, and ignore the first eight bytes as well.
I bet someone probably knows what this format is...

pyrisurfer · 13th May 2016, 15:17

Thank you!

I removed these Bytes with a Hex-Editor and the noise seems to have gone. I'm going to have to test this with a longer file, because the sound is now obviously slighty shorter and might get out of sync.

13th May 2016, 14:14	#1 \| Link
pyrisurfer Registered User Join Date: Apr 2012 Posts: 8	Raw Audio with digital noise I've got what seems to be a raw Audio file (48 kHz, 16-Bit, Little Endian). When I import it with Audacity however, I get a constant digital noise throuout the file. The file can be correctly imported by the Software which created it, so it is not inherently broken. Unfortunately, that Software does not support any other lossless audio export, so I need to somehow get it to work externally. Sample: http://www109.zippyshare.com/v/UxscLBpC/file.html

13th May 2016, 15:05	#2 \| Link
raffriff42 Retried Guesser Join Date: Jun 2012 Posts: 1,373	Seems to have embedded sync word or something, consisting of the eight bytes 65("A"), 72("H"), 80("P"), 48("0"), 128, 07, 00, 00 at offsets 8 + 1928 * n Which sounds like a 50Hz buzz... Filter those things out, and ignore the first eight bytes as well. I bet someone probably knows what this format is... Last edited by raffriff42; 16th March 2017 at 23:18. Reason: (fixed image link)

13th May 2016, 15:17	#3 \| Link
pyrisurfer Registered User Join Date: Apr 2012 Posts: 8	Thank you! I removed these Bytes with a Hex-Editor and the noise seems to have gone. I'm going to have to test this with a longer file, because the sound is now obviously slighty shorter and might get out of sync. Last edited by pyrisurfer; 13th May 2016 at 15:37.

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