Em Qui, 8 de abr de 2021 02:36, Lucas jaffa225man@gmail.com escreveu:
Well, I just got back from testing Mike's suggestion of setting the Roland Boutique D-05 as a playback quirk, disabling its capture quirk, and setting that endpoint test section to always be skipped. Sure, enough, the D-05's playback is now perfectly crystal clear without the crackles associated with an LP record.
I know that feeling and it is wonderful.
This is just a guess until I recompile again, but my capture from the D-05 reports a read error, seemingly just as the vanilla mainline kernel does, and I think it's because I disabled its capture quirk line. So, it seems to me that the D-05 needs both quirk table entries, whether or not the GT-1 does.
Looking back to Mike's 2019 post https://mailman.alsa-project.org/pipermail/alsa-devel/2020-January/161733.ht... we see the output of lsusb -v for the BOSS GT-1 and clearly we see that 0x8e is the implicit feedback sync EP, at least if we are to trust lsusb -v. Therefore Mike is on the right track that the GT-1 implicit feedback sync is for playback only.