Line 6 Looper JM4 - Manual (Page 17)

Time Stretch & Varispeed
3•3
Recording Restrictions
When using Time Stretch/Pitch Shift, the main restriction to keep in mind is that only
one mono instance of processing can be applied per active session. To work around this, all
you have to do is save your recording before adding your next overdub. That way, you can
start fresh with a rendered audio file and be free to apply Time Stretch/Pitch Shift again.
For example, to record along with one of the JM4’s internal Songs, begin by loading the
Song as usual. If you’d like to record in a lower key at the same tempo, press the SONG
button and navigate to the Tempo/Pitch Modes menu item. Press the R Arrow, select the
Time Stretching And Pitch Shifting menu item, then lower the pitch to where you want
it and record your loop, setting the loop start and end points as you normally would.
Now before you overdub a new guitar track to your loop, you must save the loop as a
Recording. Press the SAVE button, navigate to Save Recording To Internal, then press
the R Arrow, name your recording and complete the save. This frees up the JM4’s Time
Stretch/Pitch Shift processing for the next layer of overdubs. You can then load your
recording, overdub a new guitar track, and change the tempo or pitch again if desired.
Another example would be changing the tempo or key of a guitar track after it’s already
been recorded. As mentioned on the previous page, if you want to preview your guitar
track in a different key or tempo, you can use Time Stretch/Pitch Shift to listen to it, but
the sound won’t be exactly right until you actually save it as a new recording.
The way to do this would be to set your Pitch/Tempo Preview to optimize the sound for
whichever output you’re listening to, either the JM4’s Amp Out or the Line Outs, then
apply Time Stretch/Pitch Shift to the guitar track and adjust the tempo or pitch until you
get it sounding right.
When you’ve decided on the final tempo and pitch of your guitar track, save it as a
Recording and give it a new name. You can then load your saved guitar track for playback
and overdubbing, and be able to change the tempo or pitch again if desired.
In summary: always save or mix down your recording after applying Time Stretch or
Pitch Shift. This frees up the processing engine so you can use it again if you want to.
SAVE GUITAR TONE
SAVE RECORDING TO SD-CARD
SAVE RECORDING TO INTERNAL