• talal
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  • Registered: 2023-08-17
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Topic: UFX+/UCX/UCX II - sampling rates in CC mode

Hello,

For a specific application I've been trying to run the UFX+ in USB CC mode in 32kHz using Linux/Jack. However the device always jumps to 44.1 kHz upon starting jack. After a bit of digging around and I figured out the following sampling rates are supported in CC mode (as reported by ALSA in /proc/asound/cardX/stream0):

Rates: 44100, 48000, 88200, 96000, 176400, 192000

The same holds for the UCX II, while UCX can do following rates: 32000, 44100, 48000, 96000. This is under Ubuntu 20.4.1 with kernel 5.15.0 (a bit old but I didn't get around to testing this with a newer one yet).

My questions:
- Is this a limitation of the RME devices in CC mode or a limitation/bug in ALSA?
- If it's a device limitation, is it documented anywhere? Couldn't find anything
- Is there any possible solution to this?

2 Reply by MC

  • MC
  • MC
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  • Registered: 2007-04-06
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Re: UFX+/UCX/UCX II - sampling rates in CC mode

32 kHz is not supported in CC mode, sorry. And we have no plans to change that.

Regards
Matthias Carstens
RME

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  • cupakm
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  • Registered: 2014-04-03
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Re: UFX+/UCX/UCX II - sampling rates in CC mode

talal wrote:

For a specific application I've been trying to run the UFX+ in USB CC mode in 32kHz using Linux/Jack...

Hi talal, out of curiosity, whats the "specific application"?

cupakm's Website