Hi, On Wed, Feb 08, 2023 at 05:00:31PM +0100, M. Armsby wrote: > > 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. > > ________ > > I can understand your description but disagree that just because > it's Linux, all Motu users must deal with false output allocation. > The first pair should be 1+2 not headphones. > > Is it not possible to find a remedy instead. > > The Windows driver shows headphones much later in the output > numbering. Indeed, it is inconvenient in the view of user. But let us focus on how to support MOTU 896 mk3 hybrid at present, since the issue includes many technical topics; each application, drivers in kernel, libraries, and interface between them. > See Pictures taken from Reaper in Windows 10 Would I ask you to avoid attaching pictures to open mailing list? The message with many files is easily judged as spam message. Regards Takashi Sakamoto
