Where the guitar actually goes
The separator has four stems: vocals, drums, bass and other. Electric and acoustic guitars land in other, together with piano, pads and most synths. Muting the first three is how you practice a guitar part from a finished record.
If the song is a voice and a single acoustic guitar, other is close to the guitar alone. If it is a full band with two guitars and a Rhodes, you hear all of those at once. That is still enough to learn a rhythm part. It is not a tab, and it is not each guitar on its own track.
A practice order that works
Use the stem to see the part, then put the band back so you can play it in time.
- Learn the chord rhythm from the isolated stem.
- Slow it, still in the original key, until the changes are boring.
- Unmute drums and bass and mute other, and play the part yourself against the rhythm section.
- Put the whole band back, vocal included or not, and play along at tempo.
- If a lead line is buried in a keyboard, the stem will not invent a solo that was never separate.
What leaks, and what is just another instrument
A pick attack can tick into the drum stem. A low guitar note can lean into the bass stem. Solo those for a second if a note seems to vanish. The HD pass puts more of the guitar back into other than the preview does.
Distorted guitars and vocals share a lot of harsh frequencies. Some grit stays in the vocal stem, which you have muted, so the practice stem can sound slightly thinner than the guitar in the record. That is normal. Play to the pitch, not to the missing fizz.
Files, phones, and how long to wait
WAV or a high-bitrate MP3 gives the model more of the pick and the fret noise. A 128 kbps rip smears the very thing you are trying to hear.
On a phone, keep AudioDrop open until the stem has downloaded. A short loop of the riff is kinder than a ten-minute live recording.