Hi,
On Apr 21 2016 01:03, Allan Klinbail wrote:
It provides this as separate devices so I cannot access all channels at the same time in jack as in FFADO.
Although I don't typically use the ADAT ports other might, however I am always using a combination of channels 1-16 and channels 17 & 18 combined, sometimes all of them. The device is a hardware mixing desk and all ports are designed to be used simultaneously..
Use 'alsa_in' and 'alsa_out' as JACK clients, to use several ALSA PCM character devices in one JACK session. See: http://jackaudio.org/faq/multiple_devices.html
Latency performance is also much worse. FFADO will allow a buffer size of 64, ALSA will not start below 256. I prefer to work at 128 or lower.
If you think that FFADO implementation is suitable to your usage, and you believe that it's really proper for IEC 61883-1/6, please use it. ALSA firewire stack is just one of your available options in Linux-based system.
root@kxdaw:/home/allan/Downloads# cat /proc/asound/card1/dice sections: global: offset 10, size 95 ... global: ... version: 1.0.11.0
Hm. The global register has 95 quadlets. It has extra 5 quadlets as what we know. What information is in the extra fields, I don't know exactly, but I can confirm it in my Focusrite Saffire Pro 26 (interface version 1.0.12.0).
On Saffire Pro 26: $ cat /proc/asound/card1/dice sections: global: offset 10, size 95 ... global: ... version: 1.0.12.0
$ ./firewire-request /dev/fw1 read 0xffffe0000190 14 result: 000: 00 00 00 07 00 00 00 02 00 00 00 00 00 00 00 00 result: 010: 00 00 00 00
In short: 0x'ffff'e000'0190: 0x00000007 0x'ffff'e000'0194: 0x00000002 0x'ffff'e000'0198: 0x00000000 0x'ffff'e000'019c: 0x00000000 0x'ffff'e000'01a0: 0x00000000
If you can't have enough consideration about this kind of work, I'd like you to use FFADO, by blacklisting snd-dice, please.
Regards
Takashi Sakamoto