[Feature Request]: Add upmix output for 5.1 7.1 speakers setup

[nalexeyev]

Preflight Checklist

• [X] I use the latest version of YouTube Music (Application).
• [X] I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem Description

Add feature to mix/upmix channels like in Channel Mixer which is a DSP plugin for foobar2000 https://wiki.hydrogenaud.io/index.php?title=Foobar2000:Components/Channel_Mixer_(foo_channel_mixer)

Proposed Solution

Implement plugin for mixing output channels

Alternatives Considered

Add support for foobar2000 DSP plugins

Additional Information

No response

[C3S4RM3W]

I'm missing this feature since I moved to a 5.1 system