Capture PC Speaker to VGM files

[VSS-Vintorez]

Is your feature request related to a problem? Please describe.
I want to be able to record the PC speaker to a VGM file using MartyPC, since DOSBOX-VGM breaks for some games/demos, and with the cycle accuracy, it will be very useful for me to create accurate VGM recordings.

Describe the solution you'd like
Capturing the PC Speaker to a VGM file, similarly to DOSBOX-VGM.

Describe alternatives you've considered
I already considered DOSBOX-VGM, but as I said, it breaks on certain games/demos.
I also just considered recording the application externally with Audacity, but it could also capture other sounds that are not MartyPC, and the

Additional context
I don't think additional context is needed with my request, but if needed, I might be able to provide some.

[dbalsom]

last I checked VGM didn't actually support PC speaker and NewRisingSun accomplished it via encoding some somewhat equivalent commands to the AY-8-8910 chip.

The PC speaker isn't driven by a "sound chip" at all, but off some some simple circuitry attached to the system timer. I don't know well all the possible sounds you can make with it map to the AY-8-8910, like can you do fancy PWM audio tricks?

I think someone just needs to contribute an 8254 chip to the VGM specification...