The free ways, by what you have
- A YouTube videoHowGear icon → Playback speed → 0.75 or 0.5Good to knowFree and keeps pitch. No built-in bar looping
- An audio file on a computerHowAudacity: select the part → Effect → Pitch and Tempo → Change TempoGood to knowFree. Avoid Change Speed, which changes the pitch too
- An audio file, in VLCHowPlayback → SpeedGood to knowFree. Forum users report it keeps pitch. Check your version
- A phoneHowA slow-down app, such as Music Speed Changer on AndroidGood to knowA free option. Amazing Slow Downer is a paid one, which some players prefer
When to use a dedicated tool
If you do this every week, the free ways get clumsy, mainly because looping a small part is fiddly. These are built for it:
- Transcribe! Desktop software that forum players recommend often. It loops at any speed and can suggest notes.
- Song Master. Windows and Mac, with a free demo, covered by Guitar World.
- Slomo. A Mac app for $9.99 on the App Store, which saves loops with the song.
- Songsterr Plus. Speed control and looping for tabs in its library. Compared here.
A simple way to get back to speed
Slowing down only helps if you can get back up. This routine is plain and it works for most players:
- Find your clean speed. The speed where you can play the loop with no mistakes, even if that's 50%.
- Play it 3 times clean. A mistake restarts the count.
- Go up 5%. Repeat. Many apps step in 5s or 10s, and YouTube jumps from 0.5 to 0.75, so use what you have.
- If it falls apart, drop back a step. That's normal, not failure.
- Stop while it's going well. Pick it up tomorrow at a speed just below yesterday's best.
Slowing down the tab, not the record
Slowing the original helps you hear a part. Slowing a tab helps your fingers learn it, with clean notes and an exact beat. BeatMap does the second: it writes the tab from your audio, then plays it from 25% to 150% speed with a plucked-string synth, and loops any bars you tap. It isn't your original recording playing back, so use one of the tools above for that.
Next: how to transcribe a guitar solo shows what to listen for once it's slow.