[Asterisk-Users] Prompt recording

[Olle E. Johansson]

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