[PD] RPI Alsa mmap support

[Julian Brooks]

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 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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