PCM Analyzer

a451guy451 · 27th July 2009, 18:50

Anybody know of a tool to derive the word size, bit & byte orientations of a .RAW pcm file?

Thanks!

Midzuki · 28th July 2009, 01:40

How did you obtain that .raw pcm stream?

It doesn't have a container header, so if you don't already know if it's 16-bit or 24-bit, mono, stereo or multichannel, big-endian or little-endian, then you have to open it in an adequate audio editor, and try until you can hear something understandable.

a451guy451 · 28th July 2009, 01:57

Output is from Audacity 1.3beta. Any input helps me, as I'm mostly a video guy and fail in the audio realm. What I'm attempting to do is mux it into a MPG2 TS as a SMTPE302m stream. The Muxer I've got requires that I know the info, but since the files were just given to me, I wasn't sure how to analyze. I'll just do process of elimination then; I think it's Signed 24bit stereo, 48khz, little-endian. Sounds like I have some more reading to do though, because I don't know how those relate to the parameters the muxer is giving me. My choices are:

-Validity (Yes/No)
-BitReversed (Yes/No)
-ByteReversed (Yes/No)
-BytesPerWord(1,2,3,4)
-MSjustified (yes/no)
-WordSize (24,20,16)

Some combo of those has got to work, so I'll just plug away at it till I get it right.

Thanks for the input!

SomeJoe · 28th July 2009, 20:56

Do you know the length of the matching video (hh:mm:ss:ff) ? And the size of the PCM file in bytes? If so, we may be able to derive some likely values.

a451guy451 · 29th July 2009, 00:23

Actually, yeah. Here we go:
Video = 00:01:00.01
Audio = 17,568,000 bytes

If you can, thats awesome!

Thank you for any input you can provide.

27th July 2009, 18:50	#1 \| Link
a451guy451 Xbox Live: o 4lif o Join Date: Jun 2009 Location: Monrovia, CA Posts: 64	PCM Analyzer Anybody know of a tool to derive the word size, bit & byte orientations of a .RAW pcm file? Thanks!

28th July 2009, 01:57	#3 \| Link
a451guy451 Xbox Live: o 4lif o Join Date: Jun 2009 Location: Monrovia, CA Posts: 64	Output is from Audacity 1.3beta. Any input helps me, as I'm mostly a video guy and fail in the audio realm. What I'm attempting to do is mux it into a MPG2 TS as a SMTPE302m stream. The Muxer I've got requires that I know the info, but since the files were just given to me, I wasn't sure how to analyze. I'll just do process of elimination then; I think it's Signed 24bit stereo, 48khz, little-endian. Sounds like I have some more reading to do though, because I don't know how those relate to the parameters the muxer is giving me. My choices are: -Validity (Yes/No) -BitReversed (Yes/No) -ByteReversed (Yes/No) -BytesPerWord(1,2,3,4) -MSjustified (yes/no) -WordSize (24,20,16) Some combo of those has got to work, so I'll just plug away at it till I get it right. Thanks for the input! Last edited by a451guy451; 28th July 2009 at 02:18.

28th July 2009, 20:56	#4 \| Link
SomeJoe Registered User Join Date: Jan 2003 Posts: 315	Do you know the length of the matching video (hh:mm:ss:ff) ? And the size of the PCM file in bytes? If so, we may be able to derive some likely values. __________________ - SomeJoe

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28th July 2009, 01:40	#2 \| Link
Midzuki Unavailable Join Date: Mar 2009 Location: offline Posts: 1,480	How did you obtain that .raw pcm stream? It doesn't have a container header, so if you don't already know if it's 16-bit or 24-bit, mono, stereo or multichannel, big-endian or little-endian, then you have to open it in an adequate audio editor, and try until you can hear something understandable.

29th July 2009, 00:23	#5 \| Link
a451guy451 Xbox Live: o 4lif o Join Date: Jun 2009 Location: Monrovia, CA Posts: 64	Actually, yeah. Here we go: Video = 00:01:00.01 Audio = 17,568,000 bytes If you can, thats awesome! Thank you for any input you can provide.