those damn audio glitches while recording

pharmakonMtl · Post by **pharmakonMtl** » Wed Sep 29, 2004 2:10 pm

are they fixed yet?

here are some painful reminders:

http://www.ableton.com/forum/viewtopic. ... highlight=

please ignore my snappiness to ryan in this thread.. i was having a bad month

http://www.ableton.com/forum/viewtopic. ... ght=glitch

pharmakonMtl · Post by **pharmakonMtl** » Wed Sep 29, 2004 2:17 pm

erm, maybe i should clarify the problem so you all don't have to read the entire threads....

basically nearly everytime i record anything through my MOTU 896 onto my powerbook running OSX10.3.x there appears a digital distortion- type glitch which interrupts the clock. i have the latest MOTU drivers. this started around the release of Live 3.04 and through to 4.03.

has this one been swept under the rug? i really hope not...

Post by **Alex** » Wed Sep 29, 2004 2:40 pm

Hi pharmakonMtl,

the "5 seconds silence" bug was a problem in OS X 10.2.x.
Apple has it fixed within a quicktime update which updated CoreAudio too.
On OS X 10.3.x it was never an issue.

So I think the problem you experience with the MOTU is something else.

When exactly do you get these glitches? As soon as you start a recording in Live or when you arm a track? Or does it happens somewhen in between while recording?

Does it make a difference if you increase/decrease the buffersize?

regards,
Alex

noisetonepause · Post by **noisetonepause** » Wed Sep 29, 2004 3:20 pm

I have similar problems with my EMI2/6 - and yes, wiggling the buffer size fader kills the problem. For me it seems to be related to CPU usage.

iBook G3 900, 384 megs of RAM.

-Paws

Post by **Alex** » Wed Sep 29, 2004 3:30 pm

Hi noisetonepause,

same question, after which user action do you get these glitches?

regards,
Alex

pharmakonMtl · Post by **pharmakonMtl** » Wed Sep 29, 2004 4:03 pm

well i have the buffer quite low (2ms+2ms) so i can use Live as a guitar effects rig or for monitoring the room, so it may be related. i'll try increasing the buffer size to the maximum and see what that changes.

the glitch happens while recording, usually around 10-40 minutes or so into a recording-- the placement is usually quite random and rarely occurs more than once in a recording. typical recordings are either 1 or 2 mono tracks alone without effects. sometimes we have someone manning live triggering samples and actually pushing the cpu a bit and this doesn't accentuate the problem at all.

thanks,

~knophamar

noisetonepause · Post by **noisetonepause** » Wed Sep 29, 2004 5:24 pm

They just sort of show up, really, and usually don't go away until I fiddle with the buffer size in the preferences. I haven't had them for a while - actually, I haven't had time to open Live for a while

- but I've never noticed a pattern to it, except that I'm more prone to them when recording under high CPU load. I can't really give you more info than that.

Oh yeah - I'm still on v3!

-Paws

pharmakonMtl · Post by **pharmakonMtl** » Thu Sep 30, 2004 7:29 pm

well i just doubled the latency in terms of ms to 4+4ms or 183 samples and the effect is the same.

is this not a reasonable latency to expect from Live with coreaudio and a MOTU? i don't think i've ever run Live with a higher latency, even when i had no glitches, but i can't be sure since it's been so long.

thanks,

~orkahpnam

pharmakonMtl · Post by **pharmakonMtl** » Thu Sep 30, 2004 7:31 pm

double postage

muthafunka · Post by **muthafunka** » Fri Oct 01, 2004 12:12 pm

183 samples is pretty low, especially if you're pushing the processor. I notice that I start getting glitches around 70% or so whereas I used to be able to push v3 much harder...hmmmmmmm

pharmakonMtl · Post by **pharmakonMtl** » Fri Oct 01, 2004 2:38 pm

muthafunka wrote:183 samples is pretty low, especially if you're pushing the processor. I notice that I start getting glitches around 70% or so whereas I used to be able to push v3 much harder...hmmmmmmm

what latency do you run it at? is 256 samples the magic number?

i can't be the only one trying to use Live as a guitar pedal on a powerbook can i?

i'm gonna try to double the output time again and see what happens...

~rakphonam

sniffio · Post by **sniffio** » Wed Nov 03, 2004 1:41 pm

This shit is happening to me, too.
LIVE4.0.4 MOTU828mk2 OS10.3.5

those damn audio glitches while recording

those damn audio glitches while recording

Re: those damn audio glitches while recording

damn