Hey Pierre,

Not noticed any particular change in performance as of yet though my Pi is in a constant state of flux.

My limited understanding is that the updated alsa driver now has direct access to the Pi's audio hardware rather than a software workaround where access to the audio stream was routed through the gpu, this *should* trim some latency.

On my rev1 board I only use alsa but the rev2's have jack though haven't updated those ones yet.

Will let you know if anything noticeable pops up.

Sorry can't be more specific.

Julian

On 8 May 2013 14:33, Pierre Massat pimassat@gmail.com wrote:

hi Julian,

Could you please tell us what difference this makes in terms of performance ? Do you use JACK ? Is this any better than with Pd only ?

Cheers,

Pierre.

2013/5/8 Julian Brooks jbeezez@gmail.com

...

Thanks to Dan for the 'update alsa mmap' command' Thought I'd buggered up my install until I ran that command, now all happy again.

Julian

On 4 May 2013 20:18, Julian Brooks jbeezez@gmail.com wrote:

...

Hi all,

Dunno if everyone's on this already but looks useful:

http://martinezjavier.wordpress.com/2013/04/27/mmap-support-for-raspberry-pi...

From here:

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=33462&p=33494...

Not tested as of yet but anything that squeezes a bit more audio performance out of the RPi is to be welcomed.

rpi-update ahoy,

Julian

---

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Hi Julian,

Thanks for the feedback, I think i'll give it a try sometime soon.

Cheers,

Pierre.

2013/5/10 Julian Brooks jbeezez@gmail.com

Hey Pierre,

Not sure if the 2 are related but presuming they are... I've just been testing an ESI UDJ6 soundcard and the image I backed up before updating the firmware would only run the card with the usb and ethernet slowdown options. Post rpi-update got 6 channels of audio without either slowdown required though I think it does run better (less system resources) with both options enabled.

My trusty ol' Griffin just 'works' with both installs so didn't notice any difference but I haven't yet checked whether usb slowdown is still required for duplex with that soundcard as of yet.

This is on a rev1 256meg board btw.

Regards,

Julian

On 8 May 2013 14:33, Pierre Massat pimassat@gmail.com wrote:

...

hi Julian,

Could you please tell us what difference this makes in terms of performance ? Do you use JACK ? Is this any better than with Pd only ?

Cheers,

Pierre.

2013/5/8 Julian Brooks jbeezez@gmail.com

...

Thanks to Dan for the 'update alsa mmap' command' Thought I'd buggered up my install until I ran that command, now all happy again.

Julian

On 4 May 2013 20:18, Julian Brooks jbeezez@gmail.com wrote:

...

Hi all,

Dunno if everyone's on this already but looks useful:

http://martinezjavier.wordpress.com/2013/04/27/mmap-support-for-raspberry-pi...

From here:

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=33462&p=33494...

Not tested as of yet but anything that squeezes a bit more audio performance out of the RPi is to be welcomed.

rpi-update ahoy,

Julian

---

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