Audio editing software

Ultimate Vocal Remover
Ultimate Vocal Remover (UVR) is a free and open-source program that, given a master audio track, separates vocals from instruments, powered by AI (artificial intelligence). It runs fastest with a modern graphics card that supports PyTorch, though it produces identical results with any hardware, albeit more slowly. It may be used through cloud computing services such as Google Colab. Several models and parameters are included with UVR: different options may work better with different songs.

UVR is in active development. This information is accurate as of April 2021.

Links

 * Ultimate Vocal Remover on GitHub

Audacity
Audacity is a free and open-source cross-platform audio editing tool. For karaoke songs, it may be used for such purposes as mixing audio tracks together (e.g. multiple instrumental stems, or backing vocals with an instrumental track) and adding or removing silence at the beginning or end of tracks.