I either use backing tracks from YouTube or Karaoke version. I’ve used Audacity occasionally for simple fades or shortening the tune. For the last 5 years or so, I’ve got myself tracks from Perdido to Queens Under Pressure. Just recently though I’ve been starting to get variants of 12 bar blues which I’ve found to be great practice in terms of both improving playing rhythmically but also developing riffs and melodies.
