Pre-process input audio to just use vocals and remove background noise

[kurianbenoy]

Is your feature request related to a problem? Please describe.

Most of the ASR models are trained in clean audio data with minimal background choice. One good way to reduce error rate is using vocals

Describe the solution you'd like

Demucs

• https://github.com/facebookresearch/demucs
• https://github.com/xserrat/docker-facebook-demucs