Hilton,
AFAIK, you can optionally record in gsm. However, I think * won't do
it natively. It will do -in and -out wav files, soxmix them together
and then convert them to gsm. I'm offloading all of that to a
different machine and just leaving * to create the raw -in and -out
wav files.
Maybe I'm wrong too, so comments are welcomed.
Thanks,
Waldo
On Nov 8, 2005, at 3:14 AM, Quark IT - Hilton Travis wrote:
Hi Waldo,
Doesn't * record to .gsm file initially and then convert these to .wav
later? I may be totally off the mark here, and if I am, I welcome the
correction.
In that case, why not leave the files in .gsm format instead of
translating them into another lossy format? Obviously if * records
conversations as .wav files then I'd be leaning toward Speex
(Vorbis) as
it is a "suited to speech" compression format.
Both Speex and ogg are Open Source, therefore patent issues are likely
non-existent. MP3, otoh, is fine if you use one of their approved
apps,
and not if you use anything else. I'm steering clear of .mp3 (and
have
been for quite a few years now).
--
Regards,
Hilton Travis Phone: +61 (0)7 3344 3889
(Brisbane, Australia) Phone: +61 (0)419 792 394
Manager, Quark IT http://www.quarkit.com.au
Quark Group http://quarkgroup.com.au/
Microsoft Small Business Specialists
http://www.threatcode.com/ <-- its now time to shame poor coders
into writing code that is acceptable for use on today's networks
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-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
On Behalf Of Waldo Rubinstein
Sent: Tuesday, 8 November 2005 11:32
Wasn't aware of it, but if quality is good, it makes sense
since all I'm archiving is speech.
Will evaluate further.
Thanks,
Waldo
On Nov 7, 2005, at 7:14 PM, Mark Edwards wrote:
I would recommend vorbis speex for this.
You can get windows drivers to read speex files directly.
Vorbis are the same bunch that develops ogg.
Ogg and mp3 are more suited to music rather than speech.
Speex is a much better fit for speech archiving.
Mark
-----Original Message-----
From: BJ Weschke [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 8 November 2005 5:52 AM
You're probably not going to be violating any patent
protections by using OGG instead of MP3. As far as
compression goes, I've found the difference between
the two of them to be negligible. I've always used
OGG when possible to stay "IP safe".
On 11/7/05, Waldo Rubinstein <[EMAIL PROTECTED]> wrote:
I'm trying to archive out call recordings and would
appreciate some feedback as to which audio compression is
more recommended MP3 or OGG. In the past, I've use lame
to convert to MP3, but I noticed the audio volume drops
significantly. Is it just a setting on the command line
of lame or is OGG better? Which achieves higher
compression rates while maintaining call quality?
Thanks,
Waldo
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