28 Sep
2005
28 Sep
'05
7:57 a.m.
Hello!
I'm in the process of choosing mobile audio interface for both live sets
and studio recording.
I need minimal possible latency and 8x8 analog I/O.
The two from Edirol - FA-101 ($680) and UA-101($600) look promising, but
I'd like to hear about personal experience.
UA-101 is an USB 2.0 interface. AFAIU it imposes 1ms buffers, and 3
buffers setup in jackd. So, it should give 3ms minimal latency (but at
48 & 96 kHz only).
Is it possible in practice? And for what number of channels? Also, is FW
much better than USB2 and why?
As for FW solution, FreeBob project's site states FA-101 works, but I'd
like to know about minimal possible latency. And does it have any
restrictions on buffers/frequency setup?
As for RME Multiface ($700) + Cardbus ($390) (for notebook) + PCI ($300)
(for desktop), it's much more expensive solution, and AFAIK it's hard to
find notebook with appropriate PCMCIA controller to get 64-sample
(minimal) buffers to work reliable.
If there are better options, I'd like to hear about them also.
Thank you.
Best regards,
Dmitry.
P.S. Prices are for Russia, where I live.
28 Sep
28 Sep
11:07 a.m.
New subject: [linux-audio-dev] Re: [linux-audio-user] External audio interface (edirol FA/UA-101)
On Wed, 2005-09-28 at 13:59 +0400, Dmitry Baikov wrote:
Hello!
I'm in the process of choosing mobile audio interface for both live sets
and studio recording.
I need minimal possible latency and 8x8 analog I/O.
8 channels across USB? forget it. USB can stretch to about 4 channels
before things start to fall apart. YMMV, but this is what i've seen in
many win/mac audio forums.
Is it possible in practice? And for what number of
channels? Also, is FW
much better than USB2 and why?
yes, its much better: vastly higher bandwidth, much faster bus clock.
As for FW solution, FreeBob project's site states
FA-101 works, but I'd
like to know about minimal possible latency. And does it have any
restrictions on buffers/frequency setup?
not sure.
As for RME Multiface ($700) + Cardbus ($390) (for
notebook) + PCI ($300)
(for desktop), it's much more expensive solution, and AFAIK it's hard to
find notebook with appropriate PCMCIA controller to get 64-sample
(minimal) buffers to work reliable.
i'm not sure that its that hard anymore. kernel 2.6 seemed to have fixes
for most of the cardbus/pci bridge chipsets that removed problems with
low latency. 64 frame/period reliability has a lot more to do with the
rest of the system than the PCMCIA controller, in my experience. for
example, on kernel 2.4, my cardbus controller worked fine for anything
*below* 256 frames/period (but not above); my kernel wasn't well patched
enough to make that work reliably at 64 frames/period.
--p
11:54 a.m.
New subject: [linux-audio-dev] [linux-audio-user] External audio interface (edirol FA/UA-101)
Paul Davis wrote:
8 channels across USB? forget it. USB can stretch to
about 4 channels
before things start to fall apart.
An Audigy 2 NX manages eight channels just fine, even in USB 1.1 mode
(but then with no more than 16 bits at 48 kHz, and without capturing).
YMMV, but this is what i've seen in many win/mac
audio forums.
Linux rocks! ;-)
Regards,
Clemens
29 Sep
29 Sep
5:50 a.m.
As for FW solution, FreeBob project's site states
FA-101 works, but
I'd like to know about minimal possible latency. And does it have any
restrictions on buffers/frequency setup?
Yes, the FA-101 works but I can't tell you the numbers for latency. What
do you mean with restristrions on buffers (=latency?)?
All sampling frequencies should work but I think we have only used the
44,1 kHz, 48 kHz and 96 kHz so far because
we consider the 192 kHz more as marketing gag :)
Currently, I would not recommend to use our driver for a critical stuff,
though it looks very good.
Hope that helps.
cheers,
daniel
6791
days inactive
6792
days old
linux-audio-dev@lists.linuxaudio.org
3 comments
4 participants
participants (4)
-
Clemens Ladisch -
Daniel Wagner -
Dmitry Baikov -
Paul Davis