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charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Cc: Takashi Iwai , alsa-devel@alsa-project.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Em Dom, 18 de abr de 2021 09:45, Olivia Mackintosh escreveu: > > As a blind shot: might the stall be avoided by passing the recently > > introduced chip->playback_first flag? The revised patch is below. > > This appears to fix the issue, thank you! I am curious as to why this is > not required for Geraldo's DDJ-SR2. > Heh, sometimes I think Takashi Iwai is psychic ;-) Just kidding, he's "just" very talented and very experienced. Anyway, the DDJ-SR2 is originally a Serato controller. It still requires two MIDI SysEx messages to unmute the RCA inputs - engaging "Serato Mode" in marketing-speak. My point is that Pioneer may be a little more compliant / a little less deviant from the UAC2 standard when designing gear for use with third-party software. > My initial thought was that certain devices that restrict capture unless > regular SysEx/Control URBs are sent may mean that Playback first support > is required (e.g. 750, 850, 450). Please correct me if this intuition is > incorrect. > Olivia >