[Asterisk-Users] Prompt recording

[Steve Underwood]

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.
>
>BTW, where you to lazy to ask google?
>http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=sound+quality+recording+site%3Alists.digium.com&btnG=Google+Search
>  
>
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. :-)

Regards,
Steve


Regards,
Steve