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Backing track transposed, looped, and slowed down on left with instrument on right
I like to practice music by playing along with a recording using the Capo app to change tempo, set regions to loop, and sometimes transpose.
What I’d really like to do, though, is to be able to use headphones and have the recording panned to the left and the instrument (either real or virtual) panned to the right.
My first thought was whether there was an AUv3 or combination of Audio Units that could do those features of Capo but that I could use with AUM to handle the panning.
A DAW with those features could work, although it might be not as easy as I’d like. And I don’t recall if any of the iPad DAWs can tempo-shift audio. (Been spending all my time in Logic these days, which hasn’t gotten that feature yet.)
I’m also considering whether it would just be easier to get an external mixer…though that wouldn’t work for virtual instruments. Although I suppose I could use my phone for either Capo or the instrument in that case.
Anyway…any suggestions would be welcome!
Comments
That's a tough one. I don't know of anything that has the features that Capo has, or even any combination of plugins or DAW that would. Without IAA or Audiobus connectivity there's no way to route Capo's audio into AUM, so no hope of using its panning and output features.
An at least two input mixer and using a 2nd device for virtual instruments is the only way I can think it would work.
AudioStretch Pro File Player loop, in AUM, repitched and/or tempo varied as you like, panned hard left on one channel, (it’s literally what the app was designed for), your new app instrument or usb input from a real instrument on a second channel panned hard right. Sorted. If you need it fancier, take the AudioStretch loop into Koala, slice to taste, and trigger/sequence/run Koala in AUM instead, live, via its internal sequencer, or a midi sequencer app of your choice. You can even do it iteratively, re recording a sequence from Koala as a fresh File Player loop, rinsed and repeated as many times as you want.
https://apps.apple.com/gb/app/audiostretch/id571863178
Logic can time stretch…
Loopy Pro can time-stretch and you can adjust the pan/balance as you’d like. The time-stretch might not be Ableton level but it is pretty reasonable.
Forgot to mention that not only can Logic timestretch, it can also any audio follow the tempo map if you turn on follow mode in the flex and follow options (parameter panel).
Ahh, if you're only looking for time stretch there are many possibilities as noted. I thought you meant you needed the other features of Capo as well. I'm glad others read more carefully and answered the question.
Loopy Pro could be interesting for this. For one thing, if you slowed the session down, then recorded yourself playing along with the slowed down audio, you could then speed it up and compare how you sound up to tempo.
Hmm. I thought the manual was telling me it could play back such changes from the Mac version but that it couldn’t do it itself. But that must’ve been a different feature. I’ll have to play with that then.
Thanks to everyone for the suggestions! I’ve got some things for me to experiment with now.