Pulseaudio set-card-profile in default.pa not working

I am trying to set a profile persistently across reboots. Manually doing the following works:

$ pulseaudio --start
$ pacmd set-card-profile 0 'output:iec958-stereo'

But, it is not persistent across reboots, so I edited ~/.config/pulse/defult.pa appending another line:

set-card-profile 0 'output:iec958-stereo'

Adding the line to the end of default.pa causes pulseaudio to refuse to start with the error ‘Daemon session failed.’

How can I keep the profile setting persistent across reboots?

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Author: Paul

Cannot use buttons on MPOW Headphones to pause video/audio Ubuntu 20.04

I use MPOW headphones to listen to podcasts on my HP Pavilion Laptop while I work, and while on windows 10, I was able to use the buttons on my headphones to pause and play the audio as I pleased. Upon switching to Ubuntu 20.04, pressing the buttons on my headphones no longer works. The audio is just fine, it is the pause/play feature through the headphones that no longer works. Does anyone have solutions to my predicament?

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Author: hawin03

Starting word drops when speech audio is played over bluetooth speaker (Ubuntu 18.04)

I am trying to play speech audio (audio files having text-to-speech output) over bluetooth speakers over the default settings in Ubuntu 18.04. The problem is the starting word gets cut off when the audio starts or if there’s silence in the audio file. No such problem when the audio is played over wired headphones or laptop speaker. I haven’t found any question similar to mine on this forum, but questions like this and this seem the closest and according to a comment on those threads:

Sounds like an issue with A2DP, which is one of the Bluetooth protocols. A2DP has a trigger delay, which can cut off the beginning of words if there is a pause between words. Since music is typically continuous sound, you won’t have the same issue.

For now, I have added a little noise to my audio files and find there is no cutting off of starting words over the bluetooth speaker. However I would love to have a better solution if it exists.

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Author: supernova

No sound playback during call in Slack – Ubuntu 20.04

I’m on 20.04 and downloaded Slack using snap. I downloaded Spotify via snap as well as my speakers work. Not sure why Slack isn’t working. I tried every single sound source.

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Author: Dan

Is it possible there is another volume control setting for Slack application that was missed out? It is sometimes hidden deep in the Sound Settings under Applications.

I had a similar experience with Zoom for Linux. I could not hear a sound at all. The main system volume was all the way up. The app was connected to the device’s audio correctly. I reconnected a couple of times. Only to find out later on that there was yet another set of input/output controls for Zoom that was not so obvious. I only had to turn it up to hear sound during a call. By default it always seems to be at 0 when I join a call, which is weird.