Google Play Music Desktop Player - Didn't install - request for help to remove repository or PPA

Support & Help Requests
1

I thought I had installed the above application from the Software Boutique along with many other apps. Couldn’t find it in the Sound and Video menu, didn’t investigate at the time. Now when I update via the command line I get:

W: GPG error: https://dl.bintray.com/marshallofsound/deb trusty Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 379CE192D401AB61
E: The repository ‘https://dl.bintray.com/marshallofsound/deb trusty Release’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.

Is this anything to worry about ?

How can I remove the repository or PPA ? ( the PPA doesn’t show in Synaptic or ‘other software’)

Thanks

2

Normally, a PPA should appear as a file (.list) in /etc/apt/sources.list.d/ you can remove it from there and follow with sudo apt update to make sure all is square.

3

Removed ‘gpmdp.list’ as suggested. Updated, all is well !

many thanks.

4

Hey so I’m on mate 18.10. and i personally really like this app. does it work on 18.10? I tried using the one from the snap store, but the icon doesn’t render, and my keyboard shortcuts don’t work… is there any way to make this work as intended instead of removing it?