[PD] Pd on a headless Raspberry Pi

[m.e.grimm]

seen this?
http://www.raspberrypi.org/archives/1878

"When we got home, head full of ideas about encouraging people to port
Max to the Raspberry Pi, we found a mail waiting for us from Omenie,
one of our forum members. "



On Wed, Aug 29, 2012 at 3:53 PM, Pierre Massat <pimassat at gmail.com> wrote:
> This is all very interesting!
>
> To get back to my initial problem, i managed to solve it by launching Pd
> with a longer audio buffer (-audiobuf 100). For some reason Pd came with a
> default buffer of 25ms.
>
> Now, I can't tell you whether it sounds as "good" or worse than the same
> audio data played in aplay. I'll need to test this further.
>
> Cheers,
>
> Pierre.
>
>
> 2012/8/29 Tedb0t <lists at liminastudio.com>
>>
>> Ah, wow, that's crazy.  Has anyone yet tried out any USB audio interfaces
>> on the RPi yet?  I have one handy that I can try but not until I get these
>> client projects out of the way ;)
>>
>> I'm extremely curious if using a supported external audio interface solves
>> all the sound problems or if there are also still alsa issues.  I'm also now
>> wondering who will be the first to come out with an RPi audio "shield" ;)
>>
>> This renews my interest in modifying the RPi design to make a Pd-friendly
>> board that's intended to be headless with a built-in quality DAC.  But
>> without RPi's supply chain hookups, it'd be quite hard to keep the price
>> down to the RPi's level!
>>
>> —t3db0t
>>
>> On Aug 29, 2012, at 1:08 PM, Andy Farnell wrote:
>>
>> >
>> >
>> > Yes I heard that too. It's single bit PWM modulated output.
>> > Basically there's no DAC, so audio output is a fun hack,
>> > and likely as good as it's worth trying to make it for
>> > simple applications.
>> >
>> > If you want good quality audio I/O there are things like
>> > Turtle Beach Amigo for about 15 quid
>> >
>> > http://www.turtlebeach.com/products/sound-cards/audio-advantage-amigo-ii.aspx
>> >
>> > You can take it out the board from its plastic housing. Its about
>> > as small as an SD card.
>> >
>> > a.
>> >
>> > On Wed, Aug 29, 2012 at 04:40:44PM +0200, Pierre Massat wrote:
>> >> There's a guy called "dom" on the RPi forum who seems to be involved in
>> >> audio development. I've seen his interventions in a couple of audio
>> >> related
>> >> threads, and i got the information about the analog output being simple
>> >> filtered PWM off one of his posts.
>> >> Might be interesting to get in touch with him.
>> >>
>> >> Pierre.
>> >>
>> >> 2012/8/29 Tedb0t <lists at liminastudio.com>
>> >>
>> >>> This is what I'm curious about; who is doing this alsa development,
>> >>> where,
>> >>> and can we pitch in?  We are all interested  in getting the sound
>> >>> working
>> >>> better on the Pi...
>> >>>
>> >>> That said, it seems like the jury is out on if it's an alsa problem or
>> >>> a
>> >>> Pd problem.  I seem to have experienced both.
>> >>>
>> >>> —Tedb0t
>> >>>
>> >>> On Aug 29, 2012, at 6:46 AM, geoffroy wrote:
>> >>>
>> >>> With the PI the alsa is in alpha development on the arm platform and
>> >>> therefor won't be at it's best for a little while. The floating point
>> >>> integration in the latest system made the audio a lot better, as on
>> >>> the
>> >>> first gen OS of the PI the audio was just impossible.
>> >>>
>> >>>
>> >>>
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-- 
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m.e.grimm | m.f.a | ed.m.
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