Add a Left/Right Volume Balance tab/knob inside the DSP Options

Feature description:

A slider or a Knob where I can change the balance between the Left and Right Channels

Problem solved:

Recently a friend gave to me a pair of bluetoorth earphones because they had a very noticeable level imbalance between the left and right buds.
I can fix it using the accessibility options inside my phone, but it’s an inconvenience when I want to use a pair of cabled earphones and I need to rebalance the channels every time.

Brought benefits:

This give the possibility to save a profile inside the DSP menù and quickly swap between the cabled and bluetooth balance.

Other application solutions:

 

 

Additional description and context:

 

 

Screenshots / Mockup: