[PD] Audio output on Raspberry Pi - Recommendations?

[Miller Puckette]

Hi all -

I just now tried again (after some months of not fooling with it) and
got audio in+out working with no trouble at all... from a clean and
recently updated Raspian install (i.e. 'apt-get update; apt-get upgrade)
I just deleted pulseaudio:
apt-get remove pulseaudio
and then slowed my USB down to 1.1 speed by adding the setting:
dwc_otg.speed=1
to the file /boot/cmdline.txt
plugged in a Griggin iMic (bout $25 I think) and immediately got full-duplex
audio.  I'm running only one channel in and tried it with an electric guitar
with the iMic switched to 'mic in' and all worked.  I was able to get audio
latency down to 10, didn't try any lower than that.

This is all without any mouse, keyboard or video monitors connected to the
pi - I'mm SSH-ing in.  Last time I got up to this point, things started to
degrade when I put other USB devices on so I'll try that now...

cheers
Miller

On Fri, Jan 18, 2013 at 01:27:46PM +0100, Cyrille Henry wrote:
> hello,
> 
> could you tell a bit more about the alsa tweak?
> 
> thanks
> Cyrille
> 
> 
> Le 18/01/2013 12:06, padawan12 at obiwannabe.co.uk a écrit :
> >Yes, I got it goiing for a recent workshop in Nantes
> >ALSA tweaked a bit with the .asoundrc file
> >Hardware: Turtle Beach dongle (Old Amigo 1 I think)
> >Latency: 150ms (total suckage)
> >
> >On 18 January 2013 at 10:49 Julian Brooks <jbeezez at gmail.com> wrote:
> >>Apologies for dragging this up again...
> >>
> >>Can anyone confirm that they have got duplex audio working - in any form with any combination of hdmi, usb or the regular audio out of the rpi, and with which OS, version, tweaks?
> >>
> >>Still not convinced it's properly doable from our (iMic USB based) experiments.
> >>
> >>Regards,
> >>
> >>Julian
> >>
> >>On 5 January 2013 17:54, Dirk Myers <dirkm at wildvine.com <mailto:dirkm at wildvine.com>> wrote:
> >>
> >>    Thanks, all.  I'll check out the iMic & UCA222.  Cheers! -- Dirk
> >>
> >>    On Jan 4, 2013, at 12:47 PM, Julian Brooks wrote:
> >>
> >>>    +1 on the imic.
> >>>
> >>>
> >>>
> >>>    On 4 January 2013 18:18, Cyrille Henry <ch at chnry.net <mailto:ch at chnry.net>> wrote:
> >>>
> >>>        in fact, both edirol UA1X and beringer uca222 works.
> >>>        they look so similar that I mix there name.
> >>>        sorry
> >>>        Cyrille
> >>>
> >>>
> >>>        Le 04/01/2013 18:55, Pedro Lopes a écrit :
> >>>
> >>>            edirol? Isn't uca222 a behringer card?
> >>>            On Fri, Jan 4, 2013 at 6:48 PM, Cyrille Henry < ch at chnry.net <mailto:ch at chnry.net> <mailto: ch at chnry.net <mailto:ch at chnry.net>>> wrote:
> >>>
> >>>                edirol uca222 works great.
> >>>                cheers
> >>>                c
> >>>
> >>>
> >>>                Le 04/01/2013 17:49, Miller Puckette a écrit :
> >>>
> >>>                    The best ide I got was from the Griffin iMic (thanks to Joe Deken over at
> >>>                    New Blankets for running out and buying a bunch of cheap USB 'adapters' -
> >>>                    the Griffin is $40 list / $27 street).
> >>>
> >>>                    The thing looks like an apple product but (as I discovered today looking at
> >>>                    it) isn't.  Good job of apple-style-imitation-without- __infringing-trademark.
> >>>
> >>>
> >>>                    The other USB 'adapters' also worked but beware - some take more power than
> >>>                    the Pi can supply and some are physically so bulky you can't get anything
> >>>                    in the other USB slot - in either case you have to get a powered USB hub and
> >>>                    live with a layer of additional uncertainty.
> >>>
> >>>                    cheers
> >>>                    Miller
> >>>
> >>>
> >>>                    On Fri, Jan 04, 2013 at 08:18:00AM -0800, Dirk Myers wrote:
> >>>
> >>>                        Folks:
> >>>
> >>>                        I've been digging through the list & searching, haven't found a clear answer: what are folks using for audio output from the Raspberry Pi to a mixing board? I'm leaning toward trying a few USB audio interfaces. Curious about what others have used that is working well.
> >>>
> >>>                        Thanks,
> >>>
> >>>                        Dirk
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> >>>
> >>>
> >>>
> >>>
> >>>
> >>>            --
> >>>            Pedro Lopes (HCI Researcher / PhD)
> >>>            contact: pedro.lopes at hpi.uni-postdam.de <mailto:pedro.lopes at hpi.uni-postdam.de> <mailto: pedro.lopes at hpi.uni-postdam.de <mailto:pedro.lopes at hpi.uni-postdam.de>>
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