2013/1/21 Miller Puckette <msp@ucsd.edu>

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@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@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@wildvine.com <mailto:dirkm@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@chnry.net <mailto:ch@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@chnry.net <mailto:ch@chnry.net> <mailto: ch@chnry.net <mailto:ch@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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> >>>
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> >>>
> >>>
> >>> --
> >>> Pedro Lopes (HCI Researcher / PhD)
> >>> contact: pedro.lopes@hpi.uni-postdam.de <mailto:pedro.lopes@hpi.uni-postdam.de> <mailto: pedro.lopes@hpi.uni-postdam.de <mailto:pedro.lopes@hpi.uni-postdam.de>>
> >>> website: http://web.ist.utl.pt/pedro.lopes <http://web.ist.utl.pt/pedro.lopes> < http://web.ist.utl.pt/pedro.lopes/ <http://web.ist.utl.pt/pedro.lopes/>> / http://pedrolopesresearch.wordpress.com/ <http://pedrolopesresearch.wordpress.com/> | http://twitter.com/plopesresearch <http://twitter.com/plopesresearch>
> >>>
> >>>
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