Thanks Josh, good to know. Now that the RPI 4 has a controller chip, I should probably try one again.
I had some success for a project using a quad-core Udoo board circa 2013 but it was also more expensive than the Pis at that time and a bit overkill. It *did* however have a USB controller chip. > On Oct 7, 2020, at 3:42 PM, Josh Moore <[email protected]> wrote: > > The Pi 2 and 3's usb were very much hacks due to the limitations of the > Broadcom chip. It's fixed in the Pi4. See here for info: > https://www.raspberrypi.org/documentation/hardware/raspberrypi/usb/README.md > <https://www.raspberrypi.org/documentation/hardware/raspberrypi/usb/README.md> > > > > > > On Wed, Oct 7, 2020 at 5:18 AM Dan Wilcox <[email protected] > <mailto:[email protected]>> wrote: > To add on to Chris's question with a tangent, have any of you had good > experience with bog-standard stereo USB Audio interfaces and RPI 3 or 4? > > Some years ago now, I tried to use an RPI 2 with my trusty USB 1.1 standard > audio interface (Roland Edirol UA-25) which is full-duplex stereo, 2 in / 2 > out. I could never get it to work well in full-duplex mode without dropouts, > even with a low-latency kernel and other real-time tweaks. In the end, it > seemed the USB driver on the RPI was simply not designed for the > "isynchronous audio" this requires. > > The same device worked well on my original wearable, a Pentium 3 500 MHz > machine but with a dedicated USB controller chip. > > In the end, I decided to move toward iOS for embedded/wearable (hence > PdParty) and the same device works very well at low-latencies on iPads and my > (now old) iPhone 5S. > > I'd like to still be able to run the setup with alternate systems, so does > anyone have experience that the USB drivers have been improved? Thanks in > advance > >> On Oct 6, 2020, at 12:00 PM, [email protected] >> <mailto:[email protected]> wrote: >> >> Date: Tue, 6 Oct 2020 10:48:48 +0800 >> From: Chris McCormick <[email protected] <mailto:[email protected]>> >> To: PD List <[email protected] <mailto:[email protected]>> >> Subject: [PD] audio interface with multiple ins on raspberry pi >> Message-ID: <[email protected] >> <mailto:[email protected]>> >> Content-Type: text/plain; charset=utf-8; format=flowed >> >> Hey all, >> >> Same question as the previous poster but I was wondering about inputs >> rather than outputs. Ideal solution: >> >> * USB. >> * Low cost. >> * More than 2 channels in. >> * Headphone sized jacks. >> * Works with Raspberry Pi. >> >> I've searched but could not find such a beast. Any hints? >> >> Cheers, >> >> Chris. > > -------- > Dan Wilcox > @danomatika <http://twitter.com/danomatika> > danomatika.com <http://danomatika.com/> > robotcowboy.com <http://robotcowboy.com/> > > > > _______________________________________________ > [email protected] <mailto:[email protected]> mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > <https://lists.puredata.info/listinfo/pd-list> -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>
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