Florin Andrei wrote :
Anyone using the latest RME HDSP 9632 driver in ALSA, while also using the expansion cards? I mean, the newer AI4S-192 and/or AO4S-192 which are required to get the 192kHz sampling on all analogs.
Do the latest expansion cards (192kHz) work with the latest ALSA driver?
In general, are the ALSA drivers ready to support any kind of expansion cards on the HDSP 9632 / HDSP 9652?
Hi Florin,
Support is there, but as of today and as far as I know this is untested.
Thomas
Hi Thomas,
Thanks so much for your RME 9632 driver and your fantastic mixer utilities. I have a 9632 now and also the 4 port analogue expansion card.
I haven't had time to try and get any sound out of it yet! However, it is detected correctly in the mixer, and the driver thinks that there are 4 extra channels. I need to get some jack socket convertors to get some sound out, but will let you know.
Please do so, thanks.
I have a few usability comments with regards to the drivers that I would like to share, will draft a fuller email later, but basically I am using it as a hifi input for music, nothing else, but I'm frequently getting very jittery & broken up audio (guessing that the default alsa buffer/latency size is really tiny?) and not many input formats are supported which means that the plug driver is usually required (not a huge problem though). It would also be extremely nice to have some simple mixer controls available for compatibility with older/simpler apps. In particular a fake master mixer which reduces all channels would be extremely desirable (I'm hoping to use the card for a surround sound output)
For the "jittery & broken up audio" problem, are you running an optimized audio kernel (preempt + lowlatency patched) ?
How frequent is frequently ? Can you find any relation between the audio problems and external factors (disk access, heavy load, etc...) ?
For the supported formats, this is a limitation of the hardware. Plughw is indeed your friend here, or try to find a player that handles this natively (alsaplayer ?).
For the mixer controls : there were some in the past, but I removed them because I couldn't find any clean solution to deal with them while changing speed mode (because their number changes at this occasion). Maybe Jaroslav or Takashi have an idea on the subject ? When I last worked on this, the only solution I could find would have been to mess up with a semaphore held by the alsa-lib layer and although it would have worked, it would have been plain ugly.
Anyway I plan a massive redesign of the way the driver and userspace apps interact regarding the matrix mixer, mostly to enable several application to access the mixer at the same time in a cooperative way (how about an alsaseq client or a ladspa plugin accessing the matrix with the changes reflected in hdspmixer ? :). This is the prerequisite of some work I want to do with jack and ardour to handle hardware monitoring in a better way. I could indeed add a master volume control at this occasion.
Thanks for your work on this, it is very much appreciated.Thanks for your kind words, they're very much appreciated these days...
Thomas
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