On Tue, 2003-11-25 at 09:24, Jerimiah Cole wrote: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.
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
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
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