15 Jan
2021
15 Jan
'21
6:21 a.m.
Playing around with an Audiofire 12 and I have just found an interesting
limitation in latency settings. I can easily set my system up to use the
audiofire to use either the alsa drivers or the ffado drivers and have
tried both. I found an interesting result:
using the alsa driver my minimum latency when using JACK is 256/2. If I
try 128/3 (or 128/2) JACK locks up and needs kill -9 to get rid of.
Using the FFADO drivers I have been running JACK at 32/2 for over an hour
with only 1 xrun for the whole time.
So my question for anyone else who has or is using a firewire device is:
Do you also have a similar experience? And which distro?
I am mainly asking for documentation reasons for Studio-controls
--
Len Ovens
www.ovenwerks.net
15 Jan
15 Jan
6:56 a.m.
On 1/14/21 6:20 PM, Len Ovens wrote:
Playing around with an Audiofire 12 and I have just
found an
interesting limitation in latency settings. I can easily set my system
up to use the audiofire to use either the alsa drivers or the ffado
drivers and have tried both. I found an interesting result:
using the alsa driver my minimum latency when using JACK is 256/2. If
I try 128/3 (or 128/2) JACK locks up and needs kill -9 to get rid of.
Using the FFADO drivers I have been running JACK at 32/2 for over an
hour with only 1 xrun for the whole time.
So my question for anyone else who has or is using a firewire device
is: Do you also have a similar experience? And which distro?
I am mainly asking for documentation reasons for Studio-controls
Sorry, can't answer any of those questions... but how are you connecting
your Audiofire? I have one here sitting unused because the one laptop
that had a Firewire connection died a decade ago. I have a desktop
system available, so a PCIe-Firewire card would be an option, or my Dell
laptop with USB-C.
Ideas?
--
David W. Jones
gnome(a)hawaii.rr.com
authenticity, honesty, community
http://dancingtreefrog.com
"My password is the last 8 digits of π."
7:55 a.m.
On Thu, 14 Jan 2021, david wrote:
Sorry, can't answer any of those questions... but
how are you connecting
your Audiofire? I have one here sitting unused because the one laptop
that had a Firewire connection died a decade ago. I have a desktop
system available, so a PCIe-Firewire card would be an option, or my Dell
laptop with USB-C.
I bought one of these:
https://www.amazon.ca/gp/product/B006DQ0KD2/
and one of these:
https://www.amazon.ca/gp/product/B002G1YNRW/
I could not get this combination to work. However, when I got this cable:
https://www.amazon.ca/gp/product/B00016W6MS/
everything worked fine.
I do not know if it was a cable problem or a socket on the card problem.
but the 9 pin to 6 pin (800 to 400) cable worked where the 6 pin to 6 pin
did not. Could be the cable itself was bad.
I will say that the audiofire 12 has better sound than my Delta 66
(ice1712 based PCI card).
ffado-mixer has some things backwards and is unable to save settings to
the box, so my box always comes up on wordclock rather than internal
clock, so I need to set that before I can run jack no matter which drivers
I use. I suppose I should set up a script to do that :)
--
Len Ovens
www.ovenwerks.net
10:41 a.m.
On 2021-01-14 20:20:55 (-0800), Len Ovens wrote:
Playing around with an Audiofire 12 and I have just
found an interesting
limitation in latency settings. I can easily set my system up to use the
audiofire to use either the alsa drivers or the ffado drivers and have tried
both. I found an interesting result:
using the alsa driver my minimum latency when using JACK is 256/2. If I try
128/3 (or 128/2) JACK locks up and needs kill -9 to get rid of.
Using the FFADO drivers I have been running JACK at 32/2 for over an hour
with only 1 xrun for the whole time.
So my question for anyone else who has or is using a firewire device is: Do
you also have a similar experience? And which distro?
I am mainly asking for documentation reasons for Studio-controls
Hi Len,
yes, I experience the same with my RME Firewire 800.
While with the FFADO driver I can achieve much lower (and stable)
latencies, the ALSA driver seems to have higher (stable) latencies.
Moreover, the ALSA driver suffers from a bug in that particular case,
which introduces a ~10sec spike in IRQ interrupts (and a few thousand
Xruns due to that) every few minutes.
I have not been able to get any attention from upstream irt to this
problem, but it seems to be a known problem (at least according to FFADO
devs).
I hope this will get resolved eventually, as the ALSA integration is of
course a little more streamlined.
Last time I checked this was on the 5.9 kernel (Arch Linux, RT and
default kernels) and to my knowledge nothing has changed much on that
topic since then.
Maybe you'll be able to get the attention of the dev who ported most of
the FFADO things into ALSA land on the alsa-devel mailing list.
Best,
David
--
https://sleepmap.de
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days inactive
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days old
linux-audio-user@lists.linuxaudio.org
3 comments
3 participants
participants (3)
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david -
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Len Ovens