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/firew...
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