[Asterisk-Users] Prompt recording
Olle E. Johansson
oej at edvina.net
Tue Nov 25 13:46:55 MST 2003
Steve Underwood wrote:
> Steven Critchfield wrote:
>
>> On Tue, 2003-11-25 at 09:24, Jerimiah Cole wrote:
>>> Does anybody have useful tips on creating good quality recordings for
>>> use with prompts in asterisk? I'm interested in hearing input on
>>> hardware (mics, dats, sound cards, etc) and software (recording
>>> software, dsp) as well as recording techniques.
>>
>> Anything that down mixes to 8khz 8bit is fine. 8khz 8bit is the best you
>> are going to get on a phone line anyways, so shoot for just a tad above,
>> and accept the down mixing.
> Use 8kHz 16 bits, not 8 bits. The phone line is 12 to 13 bits compressed
> down to 8 in a pseudo-logartihmic way. If you start with 8 bit linear
> data it will sounds considerably worse than 8 bit data, unless the
> volume is very uniform.
>
> When recording find a really quite place. Background noise is usually
> the biggest hassle when recording prompts. Other than that, use a
> reasonable mic; fix it down someplace (don't hand hold it); and get your
> "voice model" to sit comfortably, so they sound nice and relaxed. Choose
> a friend or colleague - someone easily accessible for more recordings
> when you realise you have forgotten some. :-)
http://www.voip-info.org/tiki-index.php?page=Asterisk+sound+files
Updated...
/O
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