Am Dienstag, dem 01.03.2022 um 15:00 +0100 schrieb Martin Kepplinger: > Am Dienstag, dem 01.03.2022 um 13:44 +0000 schrieb Charles Keepax: > > On Mon, Feb 07, 2022 at 02:21:29PM +0000, Charles Keepax wrote: > > > On Mon, Feb 07, 2022 at 11:49:32AM +0100, Martin Kepplinger > > > wrote: > > > > Am Freitag, dem 04.02.2022 um 17:21 +0000 schrieb Charles > > > > Keepax: > > > > > On Fri, Feb 04, 2022 at 10:43:53AM +0100, Martin Kepplinger > > > > > wrote: > > > > Volume itself indeed is good now. Recorded voice is very > > > > "metallic" and > > > > "shallow" if you know what I mean - and distorted when using > > > > MAX > > > > volume. The gnome audio recorder doesn't show *any* signal in > > > > the > > > > UI, > > > > so that must still be kind of bad - even though I understand > > > > recorded > > > > voice way better now than before. > > > > > > > > > > My first thought is that the signal is clipping somewhere in the > > > chain. You have a lot of the gaines up very high from when you > > > were trying to working around the low signal level issues. > > > > > > Can we be clear here on what paths are in play here. Presumably > > > the gnome audio recorder is capturing over the I2S. When you say > > > you can understand the recorded voice way better now, do you mean > > > in the file captured by the gnome audio recorder? Or are you > > > listening to that on another path, like direct to the headphones? > > > > > > > thanks for all the time and help, and sorry for all the wrong > > > > amixer > > > > output I sent you, > > > > > > > > > > > Hey, just wanted to check everything was going ok on this stuff? > > Did the volume tweaks get things sounding more normal, and any > > other problems you guys are having? > > > > Thanks, > > charles > > Hi Charles! > > that's really nice of you to ask. Sorry for not replying earlier. > Mainly cset "name='MIXINR PGA Volume' 0,0" made things much better > indeed. I took a break from this then and the issue is still open, > here: > https://source.puri.sm/Librem5/librem5-base/-/merge_requests/296 > or if you want to look at the current ucm file: > https://source.puri.sm/Librem5/librem5-base/-/blob/bb48912242dd0db1f35c6de8425984414c6d37bb/default/audio/ucm2/Librem_5/HiFi.conf > > As you know I'm no expert with the codec and this definitely can be > improved: When visualizing the signal, it doesn't look "good" yet and > the signal strength seems to only go to 50% of the available scale > (in > the gnome volume setting). Actually I'll talk about this to Guido > tomorrow and even though it is kind of usable now, I hope to that we > can come up with a profile that we're preliminarliy happy with. > > Of course we already use your "Input Mode" control. > > thanks, > > martin > > Hi Charles, Let me forward the commit message I just did for the ucm settings here, now that I have a *bit* of an overview of the codec: There are 3 Volume controls for the analog parts, all before the ADC. In order from Jack to ADC, they are: numid=10,iface=MIXER,name='Capture Volume' ; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0 : values=63,63 | dBscale-min=-23.25dB,step=0.75dB,mute=0 "Input PGA Volume Control". 31=0dB. We use 39=+6dB. numid=7,iface=MIXER,name='MIXINR PGA Volume' ; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0 : values=7 | dBrange- rangemin=0,,rangemax=1 | dBscale-min=0.00dB,step=6.00dB,mute=0 rangemin=2,,rangemax=2 | dBscale-min=13.00dB,step=13.00dB,mute=0 rangemin=3,,rangemax=4 | dBscale-min=18.00dB,step=2.00dB,mute=0 rangemin=5,,rangemax=5 | dBscale-min=24.00dB,step=0.00dB,mute=0 rangemin=6,,rangemax=7 | dBscale-min=27.00dB,step=3.00dB,mute=0 "Right input PGA to Right input Boost-Mixer Gain" 0=0dB. we use 1=+3dB. numid=8,iface=MIXER,name='MIXINR IN3R Volume' ; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0 : values=6 | dBscale-min=-15.00dB,step=3.00dB,mute=0 5=0dB. we use 6=+3dB. That's a later amplifier, "Boost-Mixer Gain". ("quotes" are from the datasheet) Still, the recording sounds pretty good I think, but since gnome sound- recording doesn't visualize the signal waves - whatever that means :) I'll look at the file in audacity or something similar later. thanks for having a look, martin
