Again with the Delta 1010LT...

Again with the Delta 1010LT...

[Ludwig Schwardt]

Hi,

I'm struggling to sync two Delta 1010LT cards. I've tried both the word 
clock and SPDIF approaches, without any success. Both the SPDIF Out and 
Word Clock Out connectors show no activity when inspected by an 
oscilloscope.

Questions:

- Is the word clock output something you must switch on in the ALSA 
driver or is it supposed to start automatically when you have a valid 
clock signal on the card?

- Do I have to do something special to get SPDIF output (I'm new to 
this)? I've fiddled with iecset from alsa-utils, and otherwise I 
connected the SPDIF Out to various inputs using the patchbay of 
envy24control. Still, no signal appears on the connector.

If it helps, here is /proc/asound/card0/ice1712:

M Audio Delta 1010LT at 0xc000, irq 9

EEPROM:
   Subvendor        : 0x12143bd6
   Size             : 29 bytes
   Version          : 1
   Codec            : 0x1f
   ACLink           : 0x80
   I2S ID           : 0x72
   S/PDIF           : 0x3
   GPIO mask        : 0x4
   GPIO state       : 0x7e
   GPIO direction   : 0xfb
   AC'97 main       : 0x0
   AC'97 pcm        : 0x0
   AC'97 record     : 0x0
   AC'97 record src : 0x44
   DAC ID #0        : 0x3
   DAC ID #1        : 0x3
   DAC ID #2        : 0x3
   DAC ID #3        : 0x3
   ADC ID #0        : 0x3
   ADC ID #1        : 0x3
   ADC ID #2        : 0x3
   ADC ID #3        : 0x3
   Extra #28        : 0x0

Registers:
   PSDOUT03         : 0x8080
   CAPTURE          : 0x55000000
   SPDOUT           : 0x0005
   RATE             : 0x08

(What do these numbers mean?)

Thanks in advance,
Ludwig



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Re: Again with the Delta 1010LT...

[Tommi Sakari Uimonen]

> I'm struggling to sync two Delta 1010LT cards. I've tried both the word
> clock and SPDIF approaches, without any success. Both the SPDIF Out and
> Word Clock Out connectors show no activity when inspected by an
> oscilloscope.

Have you tried to connect card 1's spdif out to 2's input and set 2's
clock to spdif in.

I think only way to get anything properly from spdif in is to clock the
card from the spdif in also.

However, sometimes my Audiophile card receivec stuff from spdif even it's
not clocked from it, but then I get pops and cracks on leftf channel, and
sometimes I hear nothing. But both issues disappear when clocking from
spdif.

> - Is the word clock output something you must switch on in the ALSA
> driver or is it supposed to start automatically when you have a valid
> clock signal on the card?

Don't know.

> - Do I have to do something special to get SPDIF output (I'm new to

No you don't. My .asoundrc has

pcm.spdif_test
{
        type plug
        ttable.0.8 1
        ttable.1.9 1
        slave.pcm {
                type hw
                card 0
                device 0
        }
}

and I can play & capture using this 'spdif_test' device. This is for
Audiophile, but since they use same chip, this should work for you.

> this)? I've fiddled with iecset from alsa-utils, and otherwise I
> connected the SPDIF Out to various inputs using the patchbay of
> envy24control. Still, no signal appears on the connector.

>From one card? You can't connect card's outputs to any inputs with
anvy24control within the same card. JACK can do that, but it's a different
story.

You can connect inputs to outputs directly with the envy24control and it's
done in hardware.

Tommi

ps. One more thing, make sure you use the right connectors when connecting
physically the spdif inputs and outputs.


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