Check "Show:" at the bottom of the Playback Tab in pavucontrol?
I see it both in Playback and Recording and I can control it in both also.
But not when Show: is set to "Applications"
(Same versions of OS and pavucontrol as you have)
I see it here:
root2:~/>pactl list sink-inputs
Sink Input #94
Driver: module-loopback.c
Owner Module: 33
Client: n/a
Sink: 2
Sample Specification: s16le 2ch 44099Hz
Channel Map: front-left,front-right
Format: pcm, format.sample_format = "\"s16le\"" format.rate = "44100"
format.channels = "2" format.channel_map = "\"front-left,front-right\""
Corked: no
Mute: no
Volume: front-left: 60893 / 93% / -1.91 dB, front-right: 60893 / 93%
/ -1.91 dB
balance 0.00
Buffer Latency: 7324 usec
Sink Latency: 13960 usec
Resample method: speex-float-1
Properties:
media.role = "abstract"
module-stream-restore.id = "sink-input-by-media-role:abstract"
media.name = "Loopback from USB Headset H540 Analog Stereo"
So you could control it as a "sink-input" with
pactl set-sink-input-volume 94 40000 (normal (100%) is 0x10000 or 65536)
pactl set-sink-input-volume 94 80%
pactl set-sink-input-volume 94 0.7
Search for set-sink-input-volume in the pactl man page.
On Tue, 16 Jun 2020, gregrwm wrote:
> hmm:
>
> >$ pactl load-module module-loopback latency_msec=1
> >27
> >$ pactl load-module module-loopback latency_msec=1
> >28
>
> each of the above was followed by a quick flash on the Playback tab of pavucontrol, like some device appeared but disappeared again
> far too quickly to see what it was.
>
> >$ pactl list
> >...
> > Module #27
> > Name: module-loopback
> > Argument: latency_msec=1
> > Usage counter: n/a
> > Properties:
> > module.author = "Pierre-Louis Bossart"
> > module.description = "Loopback from source to sink"
> > module.version = "13.99.1"
> > Module #28
> > Name: module-loopback
> > Argument: latency_msec=1 Usage counter: n/a
> > Properties:
> > module.author = "Pierre-Louis Bossart"
> > module.description = "Loopback from source to sink"
> > module.version = "13.99.1"
> >...
>
> and yes i do have "sideband" now from mic into earcups with a tiny delay. thanks! but the quick flash and immediate disappearance
> of the device in pavucontrol seems bizarre to me. actually the volume of it is about perfect, but if i were to want to observe or
> adjust it at all...any idea?
>
> (focal ubuntu pavucontrol 4.0-1build1)
>
>
> On Tue, Jun 16, 2020 at 4:24 PM gerry <gsker at skerbitz.org> wrote:
> I just did this:
>
> https://askubuntu.com/questions/123798/how-to-hear-my-voice-in-speakers-with-a-mic
>
> In fact the only part of that I did was
> pactl load-module module-loopback latency_msec=1
>
> And immediately I had another device that showed up in pavucontrol in my
> Playback tab called
> "Loopback from USB Headset H540 Analog Stereo"
>
> And now I can hear myself in the headphones.
>
>
>