Re: presonus StudioLive 24.4.2

["m.eik michalke" <alsa@reaktanz.de>]

hi,

Am Dienstag, 16. Juni 2020, 14:18:29 CEST schrieb Takashi Sakamoto:
> 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?

$ uname -a
Linux yrla 5.3.0-59-generic #53~18.04.1-Ubuntu SMP Thu Jun 4 14:58:26 UTC 2020 
x86_64 x86_64 x86_64 GNU/Linux

> > 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.

i see.

> Would you find below procfs nodes and dump their contents?
> 
> * /proc/asound/cardX/firewire/dice
> * /proc/asound/cardX/firewire/formation

$ cat /proc/asound/cards
[...]
 4 [StudioLive     ]: DICE - StudioLive
                      PreSonus STUDIOLIVE_2442 (serial xxxxxxx) at fw1.0, S400

$ cat /proc/asound/card4/firewire/dice
sections:
  global: offset 10, size 90
  tx: offset 100, size 142
  rx: offset 242, size 282
  ext_sync: offset 524, size 4
  unused2: offset 0, size 0
global:
  owner: ffc1:000100000000
  notification: 00000020
  nick name: StudioLive
  clock select: internal 44100
  enable: 0
  status: locked 44100
  ext status: 00000000
  sample rate: 44100
  version: 1.0.4.0
  clock caps: 44100 48000 arx1 arx2 internal
  clock source names: AES12\SPDIF\AES56\AES78\AES_ANY\ADAT\ADAT_AUX\Word Clock
\Unused\Unused\Unused\Unused\Internal\\
tx 0:
  iso channel: -1
  audio channels: 16
  midi ports: 0
  speed: S400
  names: Ch 1\Ch 2\Ch 3\Ch 4\Ch 5\Ch 6\Ch 7\Ch 8\Ch 9\Ch 10\Ch 11\Ch 12\Ch 
13\Ch 14\Ch 15\Ch 16\\
  ac3 caps: 00000000
  ac3 enable: 00000000
tx 1:
  iso channel: -1
  audio channels: 16
  midi ports: 0
  speed: S400
  names: Ch 17\Ch 18\Ch 19\Ch 20\Ch 21\Ch 22\Ch 23\Ch 24\Auxiliary Ch 
25\Auxiliary Ch 26\Auxiliary Ch 27\Auxiliary Ch 28\Auxiliary Ch 29\Auxiliary 
Ch 30\Auxiliary Ch 31\Auxiliary Ch 32\\
  ac3 caps: 00000000
  ac3 enable: 00000000
rx 0:
  iso channel: -1
  sequence start: 0
  audio channels: 16
  midi ports: 0
  names: Ch 1\Ch 2\Ch 3\Ch 4\Ch 5\Ch 6\Ch 7\Ch 8\Ch 9\Ch 10\Ch 11\Ch 12\Ch 
13\Ch 14\Ch 15\Ch 16\\
  ac3 caps: 00000000
  ac3 enable: 00000000
rx 1:
  iso channel: -1
  sequence start: 0
  audio channels: 10
  midi ports: 0
  names: Ch 17\Ch 18\Ch 19\Ch 20\Ch 21\Ch 22\Ch 23\Ch 24\2TrackIn L\2TrackIn R
\\
  ac3 caps: 00000000
  ac3 enable: 00000000
ext status:
  clock source: internal
  locked: 1
  rate: 44100
  adat user data: -

$ cat /proc/asound/card4/firewire/formation
Output stream from unit:
        low     middle  high    MIDI
Tx 0:   16      0       0       0
Tx 1:   16      0       0       0
Input stream to unit:
        low     middle  high
Rx 0:   16      0       0       0
Rx 1:   10      0       0       0

> > 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'?

$ cat /proc/asound/pcm
[...]
04-00: DICE : StudioLive : playback 1 : capture 1
04-01: DICE : StudioLive : playback 1 : capture 1


all looks to me like you were right. IIUC the board provides a total of 32 
output channels and 26 for input. does this mean the device is already fully 
recognized and functional? can alsa be configured to provide all channels as 
one "sound card" so they become available in, say, ardour?


thank you & best regards :: m.eik


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