You can always run higher quality models than Spleeter, for example Demucs or the real Open-Unmix UMX-L, in their full PyTorch glory, as long as you have a comp

You can always run higher quality models than Spleeter, for example Demucs or the real Open-Unmix UMX-L, in their full PyTorch glory, as long as you have a computer that supports it. I'm somewhat limited in what can run in a browser by the nature of the project.