That's the idea: take telephone/voice @ what? 4kbps? -- it was
standard means between 300-3100Hz. often - sounds below 300Hz are now that
filtered today.
record your voice at 8Khz sampling rate and then compress with speex
various options and compare compressed and uncompressed.
as long as only speech is recorded, and not too high compression is
selected, it tends to improve, not degrade quality esp. when recording is
noisy.
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