<div dir="ltr"><div><div>Hi Martin,<br><br></div>I thought about this but since the Pi boots with the soundcard plugged in at USB 2 speed I reckon that this is not the issue. That said, I am using an iPhone charger that only outputs 1 amp. I will try it with another one as soon as I can but that won't be for a few days at least. I'll keep you informed.<br>
<br></div>John<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Jul 27, 2013 at 3:36 PM, Martin Peach <span dir="ltr"><<a href="mailto:martin.peach@sympatico.ca" target="_blank">martin.peach@sympatico.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Maybe your power supply can't handle the load? 2 Amps regulated 5V is good, 1 Amp might not do it.<br>
<br>
Martin<div><div class="h5"><br>
<br>
On 2013-07-27 05:51, John Canning wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
Hi Dan,<br>
<br>
I have done some more hunting around and on the Pd FrontPage site it<br>
says that my Behringer soundcard has been proven to work with the<br>
Raspberry Pi with reduced USB speed and I have found some posts that say<br>
they have it running in full duplex. What I get is something like this<br>
when I have the sound card plugged in on boot<br>
<br>
[ 2.469784] usb 1-1.3: new high-speed USB device number 4 using dwc_otg<br>
[ 2.571518] usb 1-1.3: New USB device found, idVendor=05e3, idProduct=0608<br>
[ 2.571545] usb 1-1.3: New USB device strings: Mfr=0, Product=1, SerialNumber=0<br>
[ 2.571562] usb 1-1.3: Product: USB2.0 Hub<br>
[ 2.573135] hub 1-1.3:1.0: USB hub found<br>
[ 2.573640] hub 1-1.3:1.0: 4 ports detected<br>
[ 2.849881] usb 1-1.3.4: new full-speed USB device number 5 using dwc_otg<br>
[ 2.953034] usb 1-1.3.4: New USB device found, idVendor=08bb, idProduct=2704<br>
[ 2.953064] usb 1-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0<br>
[ 2.953081] usb 1-1.3.4: Product: USB Audio DAC<br>
[ 2.953096] usb 1-1.3.4: Manufacturer: Burr-Brown from TI<br>
[ 2.958781] input: Burr-Brown from TI USB Audio DAC as /devices/platform/bcm2708_usb/<u></u>usb1/1-1/1-1.3/1-1.3.4/1-1.3.<u></u>4:1.2/input/input0<br>
[ 2.960263] hid-generic 0003:08BB:2704.0001: input,hidraw0: USB HID v1.00 Device [Burr-Brown from TI USB Audio DAC ] on usb-bcm2708_usb-1.3.4/input2<br>
<br>
and it just hangs there. This is with nothing else plugged in to the<br>
PI. Without the lowered USB speed I get so many dropouts that it is<br>
completely unusable. I'm sorry to keep harping on about the same thing<br>
but as with all of these things you find a little nugget that gives you<br>
hope (and another and another). The videos that I have seen like this<br>
<br>
<a href="http://hackaday.com/2013/01/28/raspberry-pi-becomes-a-guitar-effects-processor/" target="_blank">http://hackaday.com/2013/01/<u></u>28/raspberry-pi-becomes-a-<u></u>guitar-effects-processor/</a><br>
<br>
are pretty much what I'm looking for. Imperceptible/minimal dropouts and<br>
decent FX. Can you or anyone tell me why I can't even boot the Pi with<br>
the (previously community tested) soundcard plugged in running at USB 1<br>
speed? Or why if I plug it in after booting I crash the Pi?<br>
<br>
This post<br>
<br>
<a href="http://lists.puredata.info/pipermail/pd-list/2013-01/100560.html" target="_blank">http://lists.puredata.info/<u></u>pipermail/pd-list/2013-01/<u></u>100560.html</a><br>
<br>
and others in the same thread are what started me on this mission so if<br>
any of the contributors to it could tell me how they have got this up<br>
and running I would eternally grateful<br>
<br>
Thanks again,<br>
John<br>
<br>
<br>
On Sat, Jul 27, 2013 at 12:26 AM, Dan Wilcox <<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a><br></div></div><div class="im">
<mailto:<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a>>> wrote:<br>
<br>
For what it's worth, I tried force ing USB 1.1 mode on the pi with<br>
my UA-25 and that resulted in a hard lock as well. Disappointing at<br>
this point since I've worked with audio on slower embedded machines<br>
before ...<br>
<br>
On Jul 26, 2013, at 7:19 PM, John Canning<br></div>
<<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.co.uk</a> <mailto:<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.<u></u>co.uk</a>>><br>
wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Thanks for getting back to me Dan<br>
<br>
<br>
On Fri, Jul 26, 2013 at 11:50 PM, Dan Wilcox <<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a><br></div><div class="im">
<mailto:<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a>>> wrote:<br>
<br>
Actually I miss-typed. The issue is with "Isochronous" usb<br>
mode:<br>
<a href="http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=29226" target="_blank">http://www.raspberrypi.org/<u></u>phpBB3/viewtopic.php?f=28&t=<u></u>29226</a> Looks<br>
like things should be better for USB 2 audio devices, but<br>
still issues with USB 1.1 devices (aka mine :P):<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
While Isoc has improved for pretty much everyone using USB2.0<br>
devices (USB1.1 will still suffer from lost packets due to<br>
split transaction breakage noted elsewhere) I'm still annoyed<br>
at my webcams "kinda working" - I get 1-2 seconds of<br>
uninterrupted video and then a half-garbled frame.<br>
</blockquote>
<br>
<br>
On Jul 26, 2013, at 6:35 PM, Dan Wilcox <<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a><br></div>
<mailto:<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a>>> wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Sure, but that's only for certain types of USB devices. Some<br>
are working and others aren't. More "professional" sound<br>
cards require lower-latency/burst mode over USB which the PI<br>
firmware currently doesn't allow and/or doesn't set the<br>
correct priority for. The issue AFAICT is that essentially<br>
the usb host is software defined on the SOC and they haven't<br>
optimized it for usb audio, or something like that.<br>
<br>
For instance, I can get stereo out in Pd working fine with my<br>
Edirol UA-25 . If I enable an audio input, I get instant<br>
dropouts. Yeah, I guess it "works", but not well enough for me.<br>
<br>
On Jul 26, 2013, at 6:27 PM, John Canning<br>
<<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.co.uk</a><br></div>
<mailto:<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.<u></u>co.uk</a>>> wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Hi Dan,<br>
<br>
Thanks for getting back to me. I'm still very new to the Pi<br>
but have found this post that seems to say that it can work.<br>
I'm confused. What do you reckon?<br>
<br>
<br></div><div class="im">
On Fri, Jul 26, 2013 at 11:02 PM, Dan Wilcox<br></div><div class="im">
<<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a> <mailto:<a href="mailto:danomatika@gmail.com" target="_blank">danomatika@gmail.com</a>>> wrote:<br>
<br>
Simply put, the RPI firmware does not work with USB<br>
audio correctly yet. See this thread:<br>
<a href="http://lists.puredata.info/pipermail/pd-list/2013-07/103261.html" target="_blank">http://lists.puredata.info/<u></u>pipermail/pd-list/2013-07/<u></u>103261.html</a><br>
<br>
I keep looking for fixes, but the way USB is handled,<br>
the only way for it to work without dropouts is to have<br>
*nothing* else plugged into the usb bus and ethernet<br>
disabled ... sucks.<br>
<br>
On Jul 26, 2013, at 5:41 PM, <a href="mailto:pd-list-request@iem.at" target="_blank">pd-list-request@iem.at</a><br></div>
<mailto:<a href="mailto:pd-list-request@iem.at" target="_blank">pd-list-request@iem.at</a><u></u>> wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
*From:*John Canning <<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.co.uk</a><br>
<mailto:<a href="mailto:johnnyboy7777@hotmail.co.uk" target="_blank">johnnyboy7777@hotmail.<u></u>co.uk</a>>><br>
*Subject:**[PD] Raspberry Pi Behringer UCA222 boot<br>
problems*<br>
*Date:*July 26, 2013 5:40:49 PM EDT<br>
*To:*Pure Data <<a href="mailto:pd-list@iem.at" target="_blank">pd-list@iem.at</a> <mailto:<a href="mailto:pd-list@iem.at" target="_blank">pd-list@iem.at</a>>><div class="im"><br>
<br>
<br>
Hi Folks,<br>
<br>
I have been trying for quite a while to get my<br>
Raspberry Pi to work in full duplex with Pd. I have<br>
installed the OS on the PdPi site and updated it. I am<br>
using a Behringer UCA222 for audio. When I change the<br>
USB speed down to 1 (dwc_otg.speed=1) in<br>
/boot/cmdline.txt my Pi won't boot with the soundcard<br>
plugged in. If I unplug the soundcard the Pi will boot<br>
but as soon as I plug it in the Pi crashes. Has anyone<br>
got any suggestions about why this is happening?<br>
<br>
Thanks,<br>
John<br>
</div></blockquote>
<br>
--------<br>
Dan Wilcox<br>
@danomatika<br>
<a href="http://danomatika.com" target="_blank">danomatika.com</a> <<a href="http://danomatika.com/" target="_blank">http://danomatika.com/</a>><br>
<a href="http://robotcowboy.com" target="_blank">robotcowboy.com</a> <<a href="http://robotcowboy.com/" target="_blank">http://robotcowboy.com/</a>><br>
<br>
<br>
<br>
<br>
<br>
<br>
</blockquote>
<br>
--------<br>
Dan Wilcox<br>
@danomatika<br>
<a href="http://danomatika.com" target="_blank">danomatika.com</a> <<a href="http://danomatika.com/" target="_blank">http://danomatika.com/</a>><br>
<a href="http://robotcowboy.com" target="_blank">robotcowboy.com</a> <<a href="http://robotcowboy.com/" target="_blank">http://robotcowboy.com/</a>><br>
<br>
<br>
<br>
<br>
<br>
</blockquote>
<br>
--------<br>
Dan Wilcox<br>
@danomatika<br>
<a href="http://danomatika.com" target="_blank">danomatika.com</a> <<a href="http://danomatika.com/" target="_blank">http://danomatika.com/</a>><br>
<a href="http://robotcowboy.com" target="_blank">robotcowboy.com</a> <<a href="http://robotcowboy.com/" target="_blank">http://robotcowboy.com/</a>><br>
<br>
<br>
<br>
<br>
<br>
<br>
</blockquote>
<br>
--------<br>
Dan Wilcox<br>
@danomatika<br>
<a href="http://danomatika.com" target="_blank">danomatika.com</a> <<a href="http://danomatika.com" target="_blank">http://danomatika.com</a>><br>
<a href="http://robotcowboy.com" target="_blank">robotcowboy.com</a> <<a href="http://robotcowboy.com" target="_blank">http://robotcowboy.com</a>><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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</blockquote>
<br>
</blockquote></div><br></div>