Alsa works great with my UMC1820 interface. Absolute BLISS !!
I recently bought the ADA8200 ADAT extension to get 8 more inputs.
It is all connected correctly as I get all inputs and outputs and pass
sound on all inputs in Windows as a test.
However on Linux, alsa only sees 8 inputs on the UMC1820 and only two
out of eight inputs on the ADA8200, namely inputs 7&8 works.
Inputs 1-6 does not work.
Since the UMC1820 makes you select between SPDIF (technically channels
9&10) and the ADAT extension (8 channels)
Therefore if you select ADAT on the UMC1820, tyhen it drops it's own 2
spdif inputs and grabs channels 7&8 from the ADA8200 for a total of 10
input channels.
Since Alsa can at least read sound from channels 7&8 only on the
ADA8200, clearly the ADAT extension works and there is no reason why the
ADAT 1-6 should not also work as 7&8 works flawlessly
Question:
1) Did Alsa maybe only allow the 10 inputs (8 analog +_2 spdif) in the
config files generated ?
If so it completely explains what happens and why o0nl;y 2 adat channels
works.
2) Is there a config file where I can set the input channels to e.g 16
or 20 and not the 10 it currently seem to have?
I couldnt find such config files.
It really just looks like a channel count misconfig somewhere.
FYI: Alsamixer only shows 10 input channels for the UMC1820+ADA8200.
How do I make it look for 18 ?
Thanks
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
If anyone lands at this alsa dead door and have the same problem with these interfaces, search for my thread in Ardour UG where I managed to solve the problem the hard way and step over a lot of obvious alsa bugs which never get sorted out.
Cheers.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Alsa works great with my UMC1820 interface. Absolute BLISS !!
I recently bought the ADA8200 ADAT extension to get 8 more inputs.
It is all connected correctly as I get all inputs and outputs and pass
sound on all inputs in Windows as a test.
However on Linux, alsa only sees 8 inputs on the UMC1820 and only two
out of eight inputs on the ADA8200, namely inputs 7&8 works.
Inputs 1-6 does not work.
Since the UMC1820 makes you select between SPDIF (technically channels
9&10) and the ADAT extension (8 channels)
Therefore if you select ADAT on the UMC1820, tyhen it drops it's own 2
spdif inputs and grabs channels 7&8 from the ADA8200 for a total of 10
input channels.
Since Alsa can at least read sound from channels 7&8 only on the
ADA8200, clearly the ADAT extension works and there is no reason why the
ADAT 1-6 should not also work as 7&8 works flawlessly
Question:
1) Did Alsa maybe only allow the 10 inputs (8 analog +_2 spdif) in the
config files generated ?
If so it completely explains what happens and why o0nl;y 2 adat channels
works.
2) Is there a config file where I can set the input channels to e.g 16
or 20 and not the 10 it currently seem to have?
I couldnt find such config files.
It really just looks like a channel count misconfig somewhere.
FYI: Alsamixer only shows 10 input channels for the UMC1820+ADA8200.
How do I make it look for 18 ?
Thanks
Ok,
Yet again crickets.
this group is dead.
If anyone lands at this alsa dead door and have the same problem with these interfaces, search for my thread in Ardour UG where I managed to solve the problem the hard way and step over a lot of obvious alsa bugs which never get sorted out.
Cheers.