Converting mp3 voice recording to ulaw

I am trying to take some voice over recordings that are in mp3 format and convert them to 8bit, 8khz, mono wav files or ulaw or alaw which i believe is the format used in the phone system. Every time i export to a file with those settings, 8bit, 8khz, mono, i get a lot of static. What am i doing wrong?

jewbacca5252 wrote:
I am trying to take some voice over recordings that are in mp3 format and convert them to 8bit, 8khz, mono wav files or ulaw or alaw which i believe is the format used in the phone system. Every time i export to a file with those settings, 8bit, 8khz, mono, i get a lot of static. What am i doing wrong?
Probably nothing - it's an 8-bit file so it will have a much higher noise floor than you're used to - and it will seem even worse because it has a limited frequency response as well. At 6.02dB/bit, it can't ever have a noise floor lower than about 48dB - rather worse than a cassette recording!
With files like this, you have to optimise your audio before you save it to such a restricted format. This generally means some compression to keep the dynamic range down, and then normalizing the results to 0dB to use as much of the restricted range as you can. And no, there is absolutely no way around this at all - it's the Laws of Physics you're up against here.

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Converting mp3 voice recording to ulaw

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