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You should record them directly in 16kbit/8000hz/mono, converting them
down from a higher sample rate will add quantization noise into the
file.<br>
<br>
<br>
Jeremy McNamara<br>
<br>
<br>
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Brancaleoni Matteo wrote:<br>
<blockquote type="cite" cite="mid1053213817.3564.5.camel@athlon">
<pre wrap="">Hi
</pre>
<blockquote type="cite">
<pre wrap="">I'd like to record some prompts using a nice microphone and my Ensoniq
sound card, and then convert them to gsm/wav for use with asterisk.
What Linux command would I use to a) do the recordings, and then b)
convert them to the appropriate formats?
</pre>
</blockquote>
<pre wrap=""><!---->
I used Audacity (<a class="moz-txt-link-freetext" href="http://audacity.sourceforge.net/">http://audacity.sourceforge.net/</a>) under linux for
doing the recording prompts (as mark suggested sometimes ago
onto this list). Is a nice , powerful & simple tool.
Then, after recording them as 16bit/44Khz/mono wav files,
I simply converted them with a batch command to gsm with sox.
For example, if u have several waves in 1 dir, you can simply do
for I in *.wav ; do sox $I -r 8000 -b -c1 `basename $I .wav`.gsm ; done
that will batch convert all files into gsm, using the same filename
(but ending with .gsm), ready 4 asterisk.
Matteo.
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</pre>
</blockquote>
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