On Thu, 27 Sep 2018 22:36:47 +0000
Peter Stuge <peter(a)stuge.se> wrote:
I tried decoding, resampling and normalizing the ogg
success so I suggest increasing amplitude at the source; move the mic
closer to the speaker and use the parecord | spkmodem-recv command as
documented in spkmodem-recv.c. Make sure to set your mic input volume
to 0dB (and not higher!) so that you get the best possible signal,
On some device like the i945 Thinkpads, connecting an audio cable in
the output jack plug works, so you can record a clean signal by doing
that and by messing with the sound volume buttons before re-booting.
I've tried that on a gm45 Thinkpad also with coreboot, and I wasn't
able to redirect the sound.