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From: pozz <pozzugno@gmail.com>
Newsgroups: comp.arch.embedded
Subject: Re: Voice compression
Date: Mon, 7 Apr 2025 13:09:15 +0200
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Il 04/04/2025 22:54, Paul Rubin ha scritto:
> pozz <pozzugno@gmail.com> writes:
>> I tried to reduce sampling frequency to 4kHz, but the quality is
>> drastically reduced.
> 
> Try 6.5 khz.  I'll write a little more later but I've dealt with this
> problem and there are some reasonable approaches.

Yes, reducing a little the sampling freq is a good solution.

 From 8kHz to 6kHz the quality stays acceptable and the bitrate 
decreases from 32kbps to 24kbps.