3 Mar
2004
3 Mar
'04
5:57 a.m.
Hello,
I would like to use JACKD with two SBLives! soundcards in Surround40
mode (8 output channels and 4 input channels). I have seen on internet
examples of "alsa.conf" how to use SBLive! in Surround40 mode and
also how to use two normal sound cards for jack.
Problem is that I am new to this problematic and I have no idea how to
achieve my desires. Can you please help me with this? I hope it is
possible.
Petr
3 Mar
3 Mar
6:15 a.m.
On Wed, Mar 03, 2004 at 10:52:44AM +0100, Petr Sumbera wrote:
Hello,
I would like to use JACKD with two SBLives! soundcards in Surround40
mode (8 output channels and 4 input channels). I have seen on internet
examples of "alsa.conf" how to use SBLive! in Surround40 mode and
also how to use two normal sound cards for jack.
Someone really should write a FAQ about this :)
It /might/ be possible (by linking the SPDIF ports and setting some flags
or something) but its really not worth it, and would probably be
unrelaible. If you only have 1 live card dont buy the other, spend the
money on a real 8 output card, which you can buy for less than the price
of two lives.
It could also be done using a software solution, though no-ones written
the software, but one card would have a lot higher latency. Again, not
worth it.
- Steve
9 Mar
9 Mar
6:25 a.m.
Hi,
can you recommend me some 8 outputs card (producer, type)? Some web link
would be good too.
Petr
It /might/ be possible (by linking the SPDIF ports and
setting some flags
or something) but its really not worth it, and would probably be
unrelaible. If you only have 1 live card dont buy the other, spend the
money on a real 8 output card, which you can buy for less than the price
of two lives.
3 Mar
3 Mar
6:20 a.m.
On 3 Mar 2004, Petr Sumbera wrote:
Hello,
I would like to use JACKD with two SBLives! soundcards in Surround40
mode (8 output channels and 4 input channels). I have seen on internet
examples of "alsa.conf" how to use SBLive! in Surround40 mode and
also how to use two normal sound cards for jack.
Problem is that I am new to this problematic and I have no idea how to
achieve my desires. Can you please help me with this? I hope it is
possible.
this is not possible. the problem is that the oscillators that drive the
two cards will not be 100 per cent in sync. one will gradually fall
behind the other. it will not be immediately obvious, because there are
buffers, but once the timing difference between the cards exceeds the
buffer size, jackd will likely crash.
in general, the only cards that can be used this way are those with an
external sync in, such as word clock.
regards,
joern
6:36 a.m.
On Wed, Mar 03, 2004 at 11:15:29AM +0100, Joern Nettingsmeier wrote:
> I would like to use JACKD with two SBLives!
soundcards in Surround40
...
in general, the only cards that can be used this way
are those with an
external sync in, such as word clock.
Yes. Someone in IRC yesterday found that upto 4 delta 44's can be linked
in software (under windows XP only, using a kernel hack). It would be
interesting to see how this works. It will be using a hardware feature
specific to the Delta's, but might still be useful for 44 owners.
Also, though studio cards will run in sync if you link thier wordclocks,
the interaction with that and ALSA will not have been tested very
thouroughly, so I wouldn't rush out and buy more cards until I'd spoken to
someone with the same combination to find out if it worked OK.
I would guess that the cards wouldn't generally start thier buffer
transfers on the same sample, which might cause some odd problems.
- Steve
6:59 a.m.
On Wed, Mar 03, 2004 at 10:52:44AM +0100, Petr Sumbera wrote:
Hello,
I would like to use JACKD with two SBLives! soundcards in Surround40
In the interests of saving everyone fingers I've created a vestigial i(and
probably wrong) FAQ entry: http://alsa.opensrc.org/index.php?page=FAQ035
- Steve
7566
days inactive
7572
days old
linux-audio-user@lists.linuxaudio.org
5 comments
3 participants
participants (3)
-
Joern Nettingsmeier -
Petr Sumbera -
Steve Harris