Looping without warping ??

Johnisfaster · Post by **Johnisfaster** » Wed Aug 16, 2006 3:28 am

that just tells you that sometimes warping at original tempo causes some phase differences. that doesn't mean it's "degrading" your sounds. I mean use your ears if you have a 150 loop and your song is at 150 you can switch warp on and off and it sounds the same to me. it only gets messy if you change the bpm by the slightest amount.

dr.wackler · Post by **dr.wackler** » Wed Aug 16, 2006 3:49 am

j0shu@ wrote:excellent experiment, you had me excited there for a minute. however i just did it and ended up with a non-silent file, thus indicating one of two things, either the phase controls arent 100% or there is indeed sound quality change. my ears have always indicated to me that there is a difference in quality in the signal as soon as i switch that warp button to on.

check my procedure:
2 audio tracks with the same 150bpm loop
track 1 no warp
track 2 re-pitch
loop locks up squarely ie no 150.3 bpms or any tempo diff as such
track one load utility invert preset
listening i can hear faint sound
when rendered can still hear the sound and see waveform.

???

Interesting, I can't see anything in your procedure that you might have done wrong. I've tested this several times with lots of different sound files, and I always get absolute silence as the result (i.e. no normalizing or amplifying by whatever huge amount would reveal any bit of sound in the rendered file).

I guess your track volumes were at the exact same level as a matter of course, and you've done the test in the Arrange view as a matter of course, too.

Try this maybe: Uncheck 'warp' of the warped file, then check 'warp' again. This way you can ensure that the warped file is definitely playing at its original tempo (no matter what the song tempo is set to).

j0shu@ · Post by **j0shu@** » Wed Aug 16, 2006 3:51 am

Johnisfaster wrote:that just tells you that sometimes warping at original tempo causes some phase differences. that doesn't mean it's "degrading" your sounds. I mean use your ears if you have a 150 loop and your song is at 150 you can switch warp on and off and it sounds the same to me. it only gets messy if you change the bpm by the slightest amount.

???

everyones ears are different i guess.

re-pitch mode is the way to go. no arguments.

dr.wackler · Post by **dr.wackler** » Wed Aug 16, 2006 4:03 am

I forgot: Also double check that there is no warp marker at the end of the warped file.

Angstrom · Post by **Angstrom** » Wed Aug 16, 2006 11:29 am

j0shu@ wrote:
check my procedure:
2 audio tracks with the same 150bpm loop
track 1 no warp
track 2 re-pitch
loop locks up squarely ie no 150.3 bpms or any tempo diff as such
track one load utility invert preset
listening i can hear faint sound
when rendered can still hear the sound and see waveform.

???

there's an error in your procedure as far as I can tell.
try this:

load a longish loop into a sessiontrack as 'warped - beats'
look at the little box in the clip that says 'original BPM', set the MASTER live bpm to that exact bpm.
duplicate the clip onanother track and set it to 'unwarped'

ok now play the live set - you should not hear any sound at all. Test by flicking one tracks mute on and off and you will hear the original.

obviously this will not loop, but 4 bars is enough to test this.

it is pointless testing warped against pitched if you dont have the MASTER bpm at the original bpm. EG: If the original bpm is 102.23 and the master is at 100 - 'pitched' will be up or down in pitch by some small or large amount and you will hear harmonic difference.