Re: [SoX-users] VOX conversion support in SOX

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On Mar 10 10:05:01, Jie Wu wrote:
> The sample vox file can be converted successfully and played back correctly.
> But the vox file we have is from Dictaphone, and it can't be converted
> successfully.

Huh? So give us the file you do have a problem with,
instead of http://www.nch.com.au/acm/sample.vox

> Has anyone used vox to convert dictaphone vox files?
                  ^^^

You mean sox.

> Seems like Dictaphone has a customized header for their vox file formats.

So what _is_ the header of the dictaphone file?
Show us the dictaphone sample.

> Jie Wu
> Software Developer
> -----Original Message-----
> From: Jan Stary [mailto:ha...@st...] 
> Sent: Wednesday, March 10, 2010 1:18 AM
> To: sox...@li...
> Subject: Re: [SoX-users] VOX conversion support in SOX
> 
> On Mar 09 16:32:10, Jie Wu wrote:
> > I was trying to convert a OKI ADPCM audio file
> > (http://www.nch.com.au/acm/sample.vox) using the following command:
> > sox -t raw -r 8000 -c 1 -e oki-adpcm sample.vox test.wav
> > 
> > It always gives me "sox FAIL formats: bad input format for file
> > `sample.vox': data encoding was not specified" error.
> 
> This is how soxi(1) sees the file:
> 
> $ soxi sample.vox
> soxi WARN raw: `sample.vox': sample rate not specified; trying 8kHz
> 
> Input File     : 'sample.vox'
> Channels       : 1
> Sample Rate    : 8000
> Precision      : 12-bit
> Duration       : 00:00:04.40 = 35194 samples ~ 329.944 CDDA sectors
> File Size      : 17.6k
> Bit Rate       : 32.0k
> Sample Encoding: 4-bit OKI ADPCM
> 
> 
> Apparently, trying 8k is a good idea;
> at least play(1) plays the file correctly:
> 
> $ play -V sample.vox gain -6
> play: SoX v14.3.0
> play WARN raw: `sample.vox': sample rate not specified; trying 8kHz
> 
> Input File     : 'sample.vox'
> Channels       : 1
> Sample Rate    : 8000
> Precision      : 12-bit
> Duration       : 00:00:04.40 = 35194 samples ~ 329.944 CDDA sectors
> File Size      : 17.6k
> Bit Rate       : 32.0k
> Sample Encoding: 4-bit OKI ADPCM
> Reverse Nibbles: no
> Reverse Bits   : no
> 
> 
> Output File    : 'default' (sndio)
> Channels       : 1
> Sample Rate    : 8000
> Precision      : 16-bit
> Duration       : 00:00:04.40 = 35194 samples ~ 329.944 CDDA sectors
> Sample Encoding: 16-bit Signed Integer PCM
> Endian Type    : little
> Reverse Nibbles: no
> Reverse Bits   : no
> 
> play INFO sox: effects chain: input      8000Hz 1 channels
> play INFO sox: effects chain: gain       8000Hz 1 channels
> play INFO sox: effects chain: dither     8000Hz 1 channels
> play INFO sox: effects chain: output     8000Hz 1 channels
> In:23.3% 00:00:01.02 [00:00:03.38] Out:8.19k [ =====|===== ]
> Clip:0 
> 
> 
> I don't understand why you are specifying the encoding, channels, etc.
> It's all in the vox header (except the rate is not, but sox guesses
> it correctly as 8k). The easiest possible thing just works:
> 
> $ sox -V sample.vox sample.wav 
> sox: SoX v14.3.0
> sox WARN raw: `sample.vox': sample rate not specified; trying 8kHz
> 
> Input File     : 'sample.vox'
> Channels       : 1
> Sample Rate    : 8000
> Precision      : 12-bit
> Duration       : 00:00:04.40 = 35194 samples ~ 329.944 CDDA sectors
> File Size      : 17.6k
> Bit Rate       : 32.0k
> Sample Encoding: 4-bit OKI ADPCM
> Reverse Nibbles: no
> Reverse Bits   : no
> 
> Output File    : 'sample.wav'
> Channels       : 1
> Sample Rate    : 8000
> Precision      : 12-bit
> Duration       : 00:00:04.40 = 35194 samples ~ 329.944 CDDA sectors
> Sample Encoding: 16-bit Signed Integer PCM
> Endian Type    : little
> Reverse Nibbles: no
> Reverse Bits   : no
> Comment        : 'Processed by SoX'
> 
> sox INFO sox: effects chain: input      8000Hz 1 channels
> sox INFO sox: effects chain: output     8000Hz 1 channels
> sox WARN adpcms: sample.vox: ADPCM state errors: 8
> 
> The resulting sample.wav sounds just fine.
> (Don't know what "ADPCM state errors" are, though.)
> 
> 	Jan
> 
> 
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> 
> ------------------------------------------------------------------------------
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