Hi, On Mon, Feb 06, 2023 at 06:30:44PM +0100, M. Armsby wrote: > Hi there Takashi, > > please send me your instructions. > > I will do everything to get these MOTU devices working properly. Okay. As a first step, would I ask you to build `linux-firewire-utils`? * https://github.com/cladisch/linux-firewire-utils In the top level of directory, execute below commands: $ autoreconf -i $ ./configure $ make When building successfully, you can find `firewire-request` in `src` directory. It is useful to read the status of device and required for our investigation. Before building, I think you need to install some package required for the work (e.g. compiler), but I'm not Manjaro user so contact to Manjaro user to ask it... > The problem with device allocation is this: > > Ardour and Reaper see the ALSA driver and automatically choose 1+2 > for main stereo out. > > But - there is no connection. > > If I choose 3+4 then Motu hardware actually gets sound output on 1+2 > > That means all Motu outs are shifted by 2 in the Linux protocol. > > This is true for Traveler MK1 and MK3 so I assume it is an error in > all snd_motu_spec > > I made a short video demonstrating this. > > https://www.transfernow.net/dl/20230206jG0fet84/OFRBRajr Thanks for your taking and uploading the video. The below figure illustrates your cases: ++======================++ +-------+ ++===============++ || Traveler || | frame | || Application || || || | | || || || headphone output 1/2 || <- | 0/1 | <- || Output 1/2 || || analog output 1/2 || <- | 2/3 | <- || Output 3/4 || || analog output 3/4 || <- | 4/5 | <- || Output 5/6 || || analog output 5/6 || <- | 6/7 | <- || Output 7/8 || || analog output 7/8 || <- | 8/9 | <- || Output 9/10 || || AES/EBU (XLR) 1/2 || <- | 10/11 | <- || Output 11/12 || || S/PDIF (opt) 1/2 || <- | 12/13 | <- || Output 13/14 || ++======================++ +-------+ ++===============++ I note that the effective source of headphone output is selectable between the above 7 pairs. Additionally, when enabling ADAT optical output, 8 channels are newly added to the frame thus 22 channels are available in a view of application. Well, inconveniently to you, the above mapping is expected. ALSA firewire-motu driver passes no information to the application about what the channel of frame is assigned to, due to technical reason of ALSA interface to user space application. As a result, the application just enumerates audio sample in its order. Regards Takashi Sakamoto
