Well, maybe. It's still bang-bang control, and to get decent quality you'd have to dedicate the processor to bit-banging the port. With the Mac you just filled in a buffer that got DMA'd along with the video. Not great, but at least you could do waveforms using a slice of the CPU.

The PC was built to beep, and that's about it. Anything you got out of it past that was painful and used a lot of CPU.