Re: [SoX-users] .ogg to IMA-ADPCM .wav sounds horrible. Any ideas?

[Michael B. <mb...@hi...>]

Yes, I'm even having the same problem converting from .aif to .wav+IMA-ADPCM. :( This seems to be a problem in the sox IMA-ADPCM  encoder :(

---
Software Engineer
mb...@hi...



On Tuesday, December 18, 2012 at 2:31 PM, Alex Shaykevich wrote:

> I had a very similar problem with ffmpeg and IMA4, I don't know if it's related but the symptoms were quite similar to what you describe. I filed a bug report with the ffmpeg crew and the noise issue was eventually resolved. Pure speculation here, but it's possible there is shared or similar codec code somewhere in the mix. You might try with a recent ffmpeg build just to compare.
> 
> Cheers,
> 
> Alex
> 
> From: Michael Bishop <mb...@hi... (mailto:mb...@hi...)>
> To: sox...@li... (mailto:sox...@li...) 
> Sent: Wednesday, 19 December 2012 2:09 AM
> Subject: [SoX-users] .ogg to IMA-ADPCM .wav sounds horrible. Any ideas?
> 
> Hi folks,
> 
> I'm new to this list and I've run out of ideas for converting some files I have.
> 
> I've got some .ogg files and am trying to convert them to .wav files (using IMA-ADPCM). When I do it in Audacity, it sounds fine, but through sox, it sounds horrible with a crackling in the right ear.
> 
> Here is what the Audacity parameters look like:
> 
> Format: Uncompressed Files
> Options:
>  Header: WAV (Microsoft)
>  Encoding: IMA ADPCM
> 
> And here is what I'm doing with sox:
> 
>   sox --norm=-3 music.ogg -e ima-adpcm music.wav
> 
> The audacity file sounds great and it is the sox that has the cracklings.
> 
> Any ideas as to why I might get this horrible sound?
> 
> Thanks in advance,
> 
> _ michael
> 
> 
> -------------
> 
> 
> 
> Here is the soxi output:
> 
> mbishop$ soxi c1_amb_beach_loop.wav
> 
> Input File     : 'c1_amb_beach_loop.wav'
> Channels       : 2
> Sample Rate    : 44100
> Precision      : 13-bit
> Duration       : 00:00:25.03 = 1103930 samples = 1877.43 CDDA sectors
> File Size      : 1.12M
> Bit Rate       : 358k
> Sample Encoding: 4-bit IMA ADPCM
> 
> mbishop$ soxi c1_amb_beach_loop-audacity.wav 
> 
> Input File     : 'c1_amb_beach_loop-audacity.wav'
> Channels       : 2
> Sample Rate    : 44100
> Precision      : 13-bit
> Duration       : 00:00:25.04 = 1104181 samples = 1877.86 CDDA sectors
> File Size      : 1.11M
> Bit Rate       : 354k
> Sample Encoding: 4-bit IMA ADPCM
> 
> 
> 
> 
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