Re: [SoX-users] Differences recording to OGG and WAV and how to fix this

[Pander <pa...@us...>]

On 05/13/2015 06:15 PM, Pander wrote:
> Hi all,
> 
> I use the same microphone (USB 24 bit 48kHz) to do the following recordings:
> 
> rec -q -r 48000 -c 1 -b 24 -e gsm-full-rate --buffer 16384 -C 10
> test.wav trim 0 360
> rec -q -r 48000 -c 1 -b 24 -e gsm-full-rate --buffer 16384 -C 10
> test.ogg trim 0 360
> 
> But the result in spectrograms is are very different, see:
> https://i.imgur.com/fTMvDuK.png WAV
> https://i.imgur.com/z6YUcxF.png OGG
> 
> The range used in the WAV is what I want and also get via other software
> but it has these horzontal stripes (also for 32 bit). Sometimes I have a
> buffer over-run but these do not correlate with when the lines appear.
> These appear far more often.
> 
> However, differences with ulaw are minimal between these two formats:
> https://i.imgur.com/5GlszUo.png WAV
> https://i.imgur.com/e89w9Km.png OGG

Ah, also signed-integer and ulaw are showing vertical stripes.

> 
> How do I get rid of the veritcal lines when recoding WAV?
> 
> How can I get the OGG recording improve use of range?
> 
> Thanks,
> 
> Pander
> 
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