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Armsby" Subject: Re: Motu 896Mk3Hybrid dump Message-ID: Mail-Followup-To: "M. Armsby" , ALSA mail List References: <63DF98FE.2060604@gmx.de> <-9ql34ax08baa-u8njs4ojzl8k9qj8kusba8u-119dm2-3md8uqbmil7lckunia-ijl9m4n5xuto-76roex-ucqm5h-1c3kdf-5ahx5l1oy29o-no4drk-5wjqfzqre34j-p7he4b9rr95u-3lcrfi-9o14b8.1675872031471@email.android.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <-9ql34ax08baa-u8njs4ojzl8k9qj8kusba8u-119dm2-3md8uqbmil7lckunia-ijl9m4n5xuto-76roex-ucqm5h-1c3kdf-5ahx5l1oy29o-no4drk-5wjqfzqre34j-p7he4b9rr95u-3lcrfi-9o14b8.1675872031471@email.android.com> Message-ID-Hash: YUCEFMHQ6UOIIUYHCD4L64A5YCISBLPC X-Message-ID-Hash: YUCEFMHQ6UOIIUYHCD4L64A5YCISBLPC X-MailFrom: o-takashi@sakamocchi.jp X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: ALSA mail List X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: 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