Hi, I'm a developer for ALSA firewire stack. On Tue, Jun 16, 2020 at 10:11:57AM +0200, m.eik michalke wrote: > i'm trying to get a presonus StudioLive 24.4.2 up and running: > > https://www.presonus.com/products/studiolive-24.4.2 > > so far i'm partly successful -- looks like the board is automatically detected > and supported by the firewire dice module. Thanks for your trial to the device. For my information, would you show your kernel version? > however, i'm only offered 16 of the 24 supported audio channels. in the list > of soundcards it is merely shown as "studiolive" without further info on the > model. i wasn't able to find further info on this board's status with regards > to alsa, so if there's documentation on this somewhere, could someone please > point me to it? I guess that Dice ASIC in your device can process two pairs of isochronous packet streams. In the case, the driver adds two PCM devices to system. I think you saw the first PCM device and it can handle 16 PCM channels. Another can handle the rest 8 channels. Would you find below procfs nodes and dump their contents? * /proc/asound/cardX/firewire/dice * /proc/asound/cardX/firewire/formation Here, the 'X' should be replaced with the one in your system. > in case that as of now the studiolive isn't officially supported or the above > behavior is due to the fact that so far only the 16.4.2 is known to the > module, i'm willing to help as far as i can ;) i hope that already seeing 16 > channels is a good point to start and that it's not too hard to make the > remaining 8 show up as well... Would you get output from '/proc/asound/pcm'? For example, in the case of M-Audio Profire 610: $ cat /proc/asound/pcm ... 02-00: DICE : FW610 : playback 1 : capture 1 02-01: DICE : FW610 : playback 1 We can see two PCM devices in the above for playback PCM substream. Thanks Takashi Sakamoto
