[hpsdr] TeamSpeak audio 2009/June/27 - compression

[Mike Naruta]

Thank you for the information Alberto.

The original TeamSpeak .wav recording is opened
with Audacity and editing is done in Audacity.
On completion, the Audacity file is exported
to an .mp3 file.  That file is sent to a .zip
folder.  Only one export to .mp3.

73,
Mike - AA8K



Alberto I2PHD wrote:

> Mike,
> 
>   thanks for taking the time to prepare those samples.
> The 48k version is slightly better than the 24k one, as it was to be 
> expected, but
> not so significantly better to justify adding that too to the distribution.
> 
> The tempo-reduced version, IMHO, has added artifacts that makes 
> understanding
> not easier, but maybe more difficult...
> 
> So my suggestion is to not change anything, with the only advice, if you 
> are not already
> operating this way, to do all the preliminary editing on the non 
> compressed WAV files,
> and to compress to MP3 only as a final step. Otherwise each expansion 
> from MP3, then
> recompression to MP3 would add further distortion, non linearities and 
> artifacts.
> 
> Thanks a lot for your useful work !
> 
> 73  Alberto  I2PHD
> 

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