[PD] RPI Alsa mmap support

[Julian Brooks]

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 at 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 at 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 at 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-bcm2835-alsa-driver/
>>>
>>> From here:
>>>
>>> http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=33462&p=334943#p334943
>>>
>>> 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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