LinuxMusicians

Thanks for the pointer. So the alsa devs change to formats inside usbaudio.h and midi.h whenever they want. It's a shame that these include files are not in the include directory (and therefor would be available in the kernel headers). So apparently we have to copy them over from the kernel we want...

I've just given the Drumfix approach a try (did I say "just"? - well it took me half a day to finally get a kernel configuration that would actually run on my machine before I could start applying the patches.... there must be a easier way to this. I'm all open for suggestions...). Anyway,...

What do you think of the wiki idea? Nice. But I don't have any issues in CC mode with Drumfix' ua101.c from 2020-08-30 and lowlatency-kernel 5.8.6. I have the older UltraLite AVB without ESS chips and the most recent firmware. ok. Good point to add to the wiki: distinguish b/w devices with or witho...

Since page 40 we talk USB only. I have uploaded the driver code and some pseudo structs of the USB bulk messages (psseudo structs because the strings in there are of variable lemgth) on github https://github.com/Drumfix/motu-avb-usb. I have not yet implemented the protocol though. So, for now, for ...

As mentioned earlier in this thread i use my own driver based on the ua101 driver. ... Currently additionally proprietary mode must be activated by the curl command. Now that i know how to communicate with the device over USB i will add the related command to the driver soon. Great work Drumfix! So...

Btw early in this thread i posted a userspace program using libusb to copying what is received from the inputs directly to the outputs without alsa being involved at all. And it also experiencing the bug. https://linuxmusicians.com/viewtopic.php?p=96236#p96236 Drumfix : I just thought about your st...

Thanks a lot Drumfix! That certainly throws another light on the whole discussion.... :shock: It seems that all the fuss about fixing Linux may have been wasted effort. OK. I took on the challenge and tested my MOTU 828ES on my old Macbook Pro with multi-boot setup. I connected the MOTU via USB (no...

1. Do you have any references to Mac-Users that experienced the hopping with USB or did you perhaps experience that yourself on a Mac? Here for example. https://www.motunation.com/forum/viewtopic.php?f=2&t=65227&start=15 2. Would it be possible to use the libusb-based userspace program on a...

The channel hopping is there on MacOS as well when used with USB. Its just that most Macies run the 828ES via thunderbolt. Btw early in this thread i posted a userspace program using libusb to copying what is received from the inputs directly to the outputs without alsa being involved at all. And i...

I'll search around for some other alternative free OS which supports USB audio, just to see whether by chance anything works better than Linux - not meaning to replace my beloved Linux, just as a method of finding the culprit :). After some experiments with a few other open-source OSes I've not got...

There's definitely some modified stuff anyway, if you watch the boot output, their u-boot build has "MOTU" and "UltraLite AVB build xxx" printed everywhere. Anyhow, I didn't mean to derail the thread. Apologies! fohdeesha No, you were not derailing the thread at all. If anything...

If the GPL'd stuff they use is not modified, they don't have to release the source, do they ? My understanding of the GPL is that they need to provide the source regardless of whether they have modified the "original" or not. They need to provide the source that can be used to reproduce t...

I guess that's simply a bug in the Linux kernel's ALSA-USB-Code else it would happen on iPads and Macs, too. Yes, I think so too. However there is also the possibility that Mac and iPad have the same non-compliant implementation (both devices are produced by the same company, right?) and that MOTU ...

To top it off, it seems they're not publishing the source for *any* of their GPL stuff anywhere either, namely u-boot first comes to mind This was the next question that came to my mind. Wonder what FSF would think about this.... But maybe it is worth asking MOTU politely for the source. I'm not su...

bluebell wrote: ↑Mon Apr 12, 2021 10:37 am What a tragedy. It runs Linux but works best with Windows and Mac.

You nailed it!!