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