My controller:
*-firewire
description: FireWire (IEEE 1394)
product: XIO2200A IEEE-1394a-2000 Controller (PHY/Link)
vendor: Texas Instruments
physical id: 0
bus info: pci@0000:06:00.0
version: 01
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master cap_list
configuration: driver=firewire_ohci latency=32
maxlatency=4 mingnt=2
resources: irq:19 memory:f1c04000-f1c047ff
memory:f1c00000-f1c03fff
...summerize:
- If the system work with ALSA driver, the latency minimum 5ms. (and
where/how can I check the current/real value?)
Anyway I cant use the Sakamoto's utils, I downloaded and installed from
a package, but not any manual with that. I dont know how can I start
that stuff and configure in terminal. So only the Jack controller
remember my settings (and save)?
Regards
On 2016-10-27 01:47, Takashi Sakamoto wrote:
On Oct 27 2016 04:25, Pap Peti wrote:
I think my things still belongs to the 'alsa-devel' topic, because I use
the 'ffado-mixer' only to 'turn on' my audio input(s)/output(s)
I added my username to the "audio" anyway, and already I wont noticed
noise (but sometimes the audio 'stream(?)' stuck a ~half second when I
listen music and e.g.: meanwhile run a long file copy, or come some
sound from the browser. I think its a 'multi-threaded' problem, and/or
different audio sampling rate in same time.
So I use to make live records, and do some electric tracks too, but I
dont feel I need Jack, because ALSA also can work with low latency (at
least in the Tracktion). And - strange - but I feel on this platform the
sound quality better than on Windows (with Win10 and the latest Win7
64bit drivers).
If you need "sham" latency value, using libffado stuff is suitable to
your aim.
In a point of packet streaming protocol for IEC 61883-1/6 and interrupt
interval of OHCI 1394 context, ALSA bebob driver has minimum value for
PCM frames in one buffer period. Currently tt's 5msec. In detail, see
comment of corresponding code:
http://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/firewire/amdtp-stream.c#n140
Jackd with firewire backend just displays value convenient to users,
although it's not reasonable in a technical point.
Well, about the noise you heard, I can't re-generate the issue. So we
could judge it depending on environment. Do you explain more details?
Which application you use? What OHCI 1394 controller you use? And so on.
My main problem already only;
After when I turn off the soundcard and/or the laptop, I need to start
again the ffado-mixer to turning on the channels (default: every channel
muted, or inactive). I'd appreciate some stuff that resolves the basic
settings, I only need the 1/2 sreaming out and 1/2 analog input. Thats all.
(sometimes when I restart the system and the soundcard still on power
(external ps) the settings are retained)
This is not supported in ALSA bebob driver because it can be implemented
in user land. Please use ffado-dbus-server/ffado-mixer or
libhinawa/hinawa-utils.
Regards
Takashi Sakamoto
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