[PD] puredata.info Wiki editing was: audio output AND input with the Rpi?

Antoine Villeret antoine.villeret at gmail.com
Thu Oct 31 10:18:03 CET 2013 

hi,

to edit the Wiki, first create an account by clicking [join] in the upper
right corner of the page
then as soon as you are logged in you will see an [edit] tab on the top of
page to update it yourself

hope this help

+
a

--
do it yourself
http://antoine.villeret.free.fr


2013/10/31 Pierre Massat <pimassat at gmail.com>

> Dear all,
>
> I just took a quick look at the page on puredata.info and noticed that my
> soundcard (E-mu 0404 USB) is mentioned as "apparently [working]". For
> clarity's sake i think it would be good to modify the page a bit so that
> it's mentioned in the working soundcards. It's fully functional as far as i
> can tell (it works in duplex at 44100 Hz with one input) and has been since
> the beginning on the RPi without any slowing down of the USB speed. I can
> even prove it with a video (http://www.youtube.com/watch?v=NwJNeouLqgQ) !
> Problem is, i don't know how to edit the page...
>
> Cheers,
>
> Pierre.
>
>
> 2013/10/31 Julian Brooks <jbeezez at gmail.com>
>
>> Hi Chris,
>>
>> I think Theron's covered most of it.
>>
>> The Behringer 222 is on the list of working devices compiled here:
>> http://puredata.info/docs/raspberry-pi
>> so hopefully that one should be doable, and my memory is that Andy
>> Farnell has been running Turtle Beach cards during some of his workshops -
>> stuck in my mind 'cos I had a "Turtle Beach, old school" chuckle to myself.
>>
>> If you do get them running (or not for that matter) it'd be great if you
>> added your experience to the wiki page.
>>
>> For some more audio rpi tips and tweaks I heartily recommend this page:
>> http://wiki.linuxaudio.org/wiki/raspberrypi
>> and there's some more (related) good stuff here
>> http://www.raspberrypi.org/phpBB3/viewtopic.php?p=286064#p286064
>>
>> Plus of course there's a whole heap of stuff in the pd-list archives
>> (search raspberry or rpi).
>>
>> Regards,
>>
>> Julian
>>
>>
>> On 30 October 2013 00:58, Theron Trowbridge <theron.trowbridge at gmail.com>wrote:
>>
>>> There's good info on http://puredata.info/docs/raspberry-pi covering
>>> this, if you haven't seen it.
>>>
>>> There seem to be a limited number of interfaces that work.  And some
>>> people have to slow down the USB port to get clean audio (myself included,
>>> using the iMic (
>>> http://www.amazon.com/Griffin-Technology-iMic-Audio-Device/dp/B000BVV2IC).
>>>  And I have to use a wireless keyboard/mouse if I'm not connecting via ssh (
>>> http://www.amazon.com/gp/product/B004KSQANO/).  It's not ideal, and a
>>> little annoying that the accessories are more than the cost of the
>>> Raspberry Pi.  But it works.
>>>
>>> The USB port is slowed down by adding "dwc_otg.speed=1" to
>>> /boot/cmdline.txt
>>>
>>>
>>> -Theron
>>> ^
>>>
>>>
>>>
>>> On Tue, Oct 29, 2013 at 12:03 AM, s p <sebpiq at gmail.com> wrote:
>>>
>>>> Same here ... I tried with 2 different usb interfaces, and I got no
>>>> luck. In both cases I got "some" sound input, but there is a lot of popping
>>>> sounds.
>>>>
>>>>
>>>> 2013/10/28 Chris Jack <christopherdanieljack at gmail.com>
>>>>
>>>>>  Hey folks,
>>>>>
>>>>> Apologies as this post is not strictly about Pd, though Pd will be a
>>>>> crucial part of my final setup so whatever solution I find ought to work
>>>>> with Pd. Also, there is a chance the issue might lie with Pd. I just don't
>>>>> know.
>>>>>
>>>>> I'm looking for a usb bus-powered audio interface for the Rpi that can
>>>>> take a stereo input and provide stereo output *at the same time.*
>>>>> * *
>>>>> I have tried a couple different images and a couple different audio
>>>>> interfaces, to no avail. Perhaps there's something can be done with one of
>>>>> these setups to get it working?
>>>>>
>>>>> First, the Pd-LA custom Raspian (v1) image and Pd 43.2:
>>>>>
>>>>> ..with Behringer UCA202 (at 44100khz):
>>>>>
>>>>> Alsamixer picks the device up but the input section shows nothing.
>>>>>
>>>>> Pd (gui) audio preferences allows selection of the interface for both
>>>>> input and output. Output only is lovely and clean but as soon as the device
>>>>> is selected for audio input the audio quality drops horrendously (vaguely
>>>>> recognisable from the original signal)..
>>>>> ..although what gives me hope is I CAN software monitor the input
>>>>> (poorly) in 'Test Audio and MIDI' with this arrangement.
>>>>>
>>>>> ..with Behringer UCA202 (at 48000khz):
>>>>>
>>>>> Output only in Pd is poor (beating and popping sound - possibly sounds
>>>>> like a samp rate conversion issue).
>>>>> When device is selected as Pd input software monitoring is possible
>>>>> and oddly, though the result is still poor, there is effectively no drop in
>>>>> quality from having the device selected only for output and the monitored
>>>>> signal sounds drastically better than at 44100khz.
>>>>>
>>>>>
>>>>> ..with Turtle Beach Amigo II* (at 44100):
>>>>>
>>>>> Alsamixer shows both input and output and allows to change gain of
>>>>> both.
>>>>> If plugged in from boot and only the output is selected in Pd it works
>>>>> but with a lot of jitter. Selecting the device for input too causes a
>>>>> further drop in audio quality although again I can software monitor the
>>>>> input in 'Test Audio and MIDI'
>>>>> If plugged in after boot the OS crashes.
>>>>>
>>>>>
>>>>> The Satellite CCRMA (operating via ssh) and Pd-extended:
>>>>>
>>>>> ..with Behringer UCA202 (at 44100 and 48000):
>>>>>
>>>>> Alsamixer picks the device up but again the input section shows
>>>>> nothing.
>>>>>
>>>>> If I have the device plugged in from boot then I get the same
>>>>> behaviour with it as I do in Pd vanilla on the Pd-LA Raspian image, ie.
>>>>> software input monitoring but at an extremely poor quality.
>>>>>
>>>>> If I don't plug the device in from boot I see it in Pd audio prefs but
>>>>> get this:
>>>>>
>>>>> ALSA input error (snd_pcm_open): No such file or directory
>>>>>
>>>>> ALSA output error (snd_pcm_open): No such file or directory
>>>>>
>>>>> from the Pd terminal and this
>>>>>
>>>>> ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card
>>>>> ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card
>>>>> oops: ALSA cards not reported in order?
>>>>>
>>>>> from the ssh terminal.
>>>>>
>>>>>
>>>>> ..with Turtle Beach Amigo II* (at 44100khz):
>>>>>
>>>>> Alsamixer shows both input and output and allows to change gain of
>>>>> both.
>>>>>
>>>>> If plugged in from boot and then only output selected in Pd I get
>>>>> clean audio out. If I try to select the Turtle Beach as audio inout in Pd
>>>>> then Pd stalls indefinitely when I try to 'Test Audio and MIDI' or make
>>>>> anything in a patch.
>>>>>
>>>>> Same direct input monitoring by default.
>>>>>
>>>>> Also get
>>>>>
>>>>> ALSA input error (snd_pcm_open): Device or resource busy
>>>>>
>>>>> ALSA output error (snd_pcm_open): Device or resource busy
>>>>>
>>>>> from the Pd terminal if I don't have it plugged in from boot, though
>>>>> no message in ssh terminal.
>>>>>
>>>>> *It also appears that by default the Turtle Beach does direct input
>>>>> monitoring of some sorts, the output stage sending out a clean copy of
>>>>> whatever signal is going into the input stage whenever the device is
>>>>> plugged into a usb port. With the Pd-LA image this occurred simultaneously
>>>>> while input monitoring in Pd. I guess this is part of the design of the
>>>>> Turtle Beach, though their documentation is devoid of any useful info
>>>>> regards this. If this is the case then this ain't the sound card for me,
>>>>> though clearly some might find this a very useful feature.
>>>>>
>>>>> Just to give a bit more info about what I'm attempting: I wish to run
>>>>> the stereo input from the Turtle Beach through Pd, play with the audio
>>>>> signal using data from an accelerometer (not nearly there yet) and then
>>>>> send the audio out through the Turtle Beach's stereo output.
>>>>>
>>>>> Apologies for the essay. Hopefully my findings are useful for others
>>>>> and hopefully I can get my rig working! Help muchly appreciated. I've
>>>>> probably left out some crucial bit of info so please shout me if I have!
>>>>>
>>>>> Cheers,
>>>>> Chris Jack.
>>>>>
>>>>> Chris Jack
>>>>>
>>>>> *art/research*
>>>>> http://itsmrjack.com/
>>>>>
>>>>> *discus jockeying/sound art*
>>>>> http://soundcloud.com/itsmrjack/
>>>>>
>>>>> _______________________________________________
>>>>> Pd-list at iem.at mailing list
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>>>>> http://lists.puredata.info/listinfo/pd-list
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> *Sébastien Piquemal
>>>> *
>>>> *
>>>> ** *-----* @sebpiq*
>>>>  -----* *http://github.com/sebpiq*
>>>> *
>>>>  ----- http://funktion.fm
>>>>
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>>>>
>>>
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