Karlheinz Essl

Currently I am working on a new piece for live input (electric guitar) which is processed in realtime by a generative Max/MSP patch.

Whenever I hit a key on the computer's keyboard or even touch the trackpad after a certain time (say: 1 minute), the audio output produces a noticable audio glitch.

It seems to me as if the computer was falling in a sort of sleep mode and the glitch were the side effect of its awakening.

Changing the performance parameters of Max (Overdrive, Scheduler in audio interrupt, various settings for I/O and Signal Vector Sizes) and also the "Energy Saver" of the System Preferences did not help.

* MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)

* MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)
* Edirol UA-25 Audio Interface

Karlheinz Essl
http://myspace.com/karlheinzessl


audio-glitches-when-using-computer-keyboard

1. Have you got any firewire devices attached? I had a similar problem

in that it kept falling asleep becasue of a LaCie drive attached via

firewire. I changed it to USB2 and fixed. The timing you mentions is

about right (1 minute). No audio glitches but display would go. I

would then have to force it to sleep and out and do a restart which

would normally fix it. Energy saver was off.

sudo pmset -a hibernatemode 0;sudo rm /var/vm/sleepimage

3. A lot of problems I had recently went away affter purging

Ds_stores. I.e the weird behaviours I mentioned acouple of weeks ago.

YOU LOOSE THE STATE OF WINDOWS LIKE COLUMN VIEW ETC BUT SMALL PRICE TO

echo -n 'CLIX cleaning .DS_Store files... ';sudo find / -name

defaults write com.apple.finder DisableAllAnimations -bool YES;killall Finder

A lot of finder problems where put right by number 4

> Currently I am working on a new piece for live input (electric guitar) which is processed in realtime by a generative Max/MSP patch.

> Whenever I hit a key on the computer's keyboard or even touch the trackpad after a certain time (say: 1 minute), the audio output produces a noticable audio glitch.

> It seems to me as if the computer was falling in a sort of sleep mode and the glitch were the side effect of its awakening.

> Changing the performance parameters of Max (Overdrive, Scheduler in audio interrupt, various settings for I/O and Signal Vector Sizes) and also the "Energy Saver" of the System Preferences did not help.

> * MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)

"You will never know what size worm is in your next byte"!

1. Have you got any firewire devices attached? I had a similar problem
in that it kept falling asleep becasue of a LaCie drive attached via
firewire. I changed it to USB2 and fixed. The timing you mentions is
about right (1 minute). No audio glitches but display would go. I
would then have to force it to sleep and out and do a restart which
would normally fix it. Energy saver was off.

2. Is "safe sleep" mode on?
to turn off:
sudo pmset -a hibernatemode 0;sudo rm /var/vm/sleepimage

3. A lot of problems I had recently went away affter purging
Ds_stores. I.e the weird behaviours I mentioned acouple of weeks ago.
YOU LOOSE THE STATE OF WINDOWS LIKE COLUMN VIEW ETC BUT SMALL PRICE TO
PAY:

echo -n 'CLIX cleaning .DS_Store files... ';sudo find / -name
.DS_Store -exec rm -f {} ;;echo done.

4. Turn all animations off.?:
defaults write com.apple.finder DisableAllAnimations -bool YES;killall Finder

On 05/01/2008, Karlheinz Essl  wrote:
>
> Dear Maxers!
>
> Currently I am working on a new piece for live input (electric guitar) which is processed in realtime by a generative Max/MSP patch.
>
> Whenever I hit a key on the computer's keyboard or even touch the trackpad after a certain time (say: 1 minute), the audio output produces a noticable audio glitch.
>
> It seems to me as if the computer was falling in a sort of sleep mode and the glitch were the side effect of its awakening.
>
> Changing the performance parameters of Max (Overdrive, Scheduler in audio interrupt, various settings for I/O and Signal Vector Sizes) and also the "Energy Saver" of the System Preferences did not help.
>
> Here's my system configuration:
>
> * MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)
> * Edirol UA-25 Audio Interface
>
> Any ideas that could help?
>
> Thanks in advance,
>
> Karlheinz Essl
> http://myspace.com/karlheinzessl
>

-- 
A Pereshaped definition of an Apple:
"You will never know what size worm is in your next byte"!


Apologees, I meant number 3 not number 4. duh!! number 3 is a one line

> 1. Have you got any firewire devices attached? I had a similar problem

> in that it kept falling asleep becasue of a LaCie drive attached via

> firewire. I changed it to USB2 and fixed. The timing you mentions is

> about right (1 minute). No audio glitches but display would go. I

> would then have to force it to sleep and out and do a restart which

> would normally fix it. Energy saver was off.

> sudo pmset -a hibernatemode 0;sudo rm /var/vm/sleepimage

> 3. A lot of problems I had recently went away affter purging

> Ds_stores. I.e the weird behaviours I mentioned acouple of weeks ago.

> YOU LOOSE THE STATE OF WINDOWS LIKE COLUMN VIEW ETC BUT SMALL PRICE TO

> echo -n 'CLIX cleaning .DS_Store files... ';sudo find / -name

> defaults write com.apple.finder DisableAllAnimations -bool YES;killall Finder

> A lot of finder problems where put right by number 4

> > Currently I am working on a new piece for live input (electric guitar) which is processed in realtime by a generative Max/MSP patch.

> > Whenever I hit a key on the computer's keyboard or even touch the trackpad after a certain time (say: 1 minute), the audio output produces a noticable audio glitch.

> > It seems to me as if the computer was falling in a sort of sleep mode and the glitch were the side effect of its awakening.

> > Changing the performance parameters of Max (Overdrive, Scheduler in audio interrupt, various settings for I/O and Signal Vector Sizes) and also the "Energy Saver" of the System Preferences did not help.

> > * MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)

Apologees, I meant number 3 not number 4. duh!! number 3 is a one line
command not two

On 05/01/2008, Pere Josep Villez  wrote:
> 1. Have you got any firewire devices attached? I had a similar problem
> in that it kept falling asleep becasue of a LaCie drive attached via
> firewire. I changed it to USB2 and fixed. The timing you mentions is
> about right (1 minute). No audio glitches but display would go. I
> would then have to force it to sleep and out and do a restart which
> would normally fix it. Energy saver was off.
>
> Using terminal
>
> 2. Is "safe sleep" mode on?
> to turn off:
> sudo pmset -a hibernatemode 0;sudo rm /var/vm/sleepimage
>
> 3. A lot of problems I had recently went away affter purging
> Ds_stores. I.e the weird behaviours I mentioned acouple of weeks ago.
> YOU LOOSE THE STATE OF WINDOWS LIKE COLUMN VIEW ETC BUT SMALL PRICE TO
> PAY:
>
> echo -n 'CLIX cleaning .DS_Store files... ';sudo find / -name
> .DS_Store -exec rm -f {} ;;echo done.
>
> 4. Turn all animations off.?:
> defaults write com.apple.finder DisableAllAnimations -bool YES;killall Finder
>
> A lot of finder problems where put right by number 4
>
>
> Sorry no clear answer from me. P
>
> On 05/01/2008, Karlheinz Essl  wrote:
> >
> > Dear Maxers!
> >
> > Currently I am working on a new piece for live input (electric guitar) which is processed in realtime by a generative Max/MSP patch.
> >
> > Whenever I hit a key on the computer's keyboard or even touch the trackpad after a certain time (say: 1 minute), the audio output produces a noticable audio glitch.
> >
> > It seems to me as if the computer was falling in a sort of sleep mode and the glitch were the side effect of its awakening.
> >
> > Changing the performance parameters of Max (Overdrive, Scheduler in audio interrupt, various settings for I/O and Signal Vector Sizes) and also the "Energy Saver" of the System Preferences did not help.
> >
> > Here's my system configuration:
> >
> > * MacBook Pro (2.16 GHz, 2 MB RAM, OSX 10.4.11)
> > * Edirol UA-25 Audio Interface
> >
> > Any ideas that could help?
> >
> > Thanks in advance,
> >
> > Karlheinz Essl
> > http://myspace.com/karlheinzessl
> >
>
>
> --
> A Pereshaped definition of an Apple:
> "You will never know what size worm is in your next byte"!
>

Audio glitches when using computer keyboard