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So I finally gave up and assigned the Novation to the "non-Linux-compatible-hardware" pile, re-installed Ubuntu Studio and the Real Time kernel, and have been trying to get my RME Digi 96/8 PRO running with the help of a Ubuntu Forums member.

The RME is listed as a supported card for ALSA, and Qjackctl sees it and starts the server, but I either get recurring xruns (and choppy sound), or the error message "cannot send request type 7 to server
cannot read result for request type 7 from server (Broken pipe)", depending on what settings I try to start with.

The Ubuntu Forums member noted that JACK was trying to start the session with a 32bit driver, but the RME is a 24bit card, and he suggested changing the word length to 24. When I tried to do this, I noticed that the Word Length option for the RME card under ALSA was not accessible (it appears that it's only accessible when the OSS driver is selected, and then it's only to fixed values of 16, 32 or 64).

Is it possible to set the Word Length for the ALSA driver using Qjackctl?

Cheers,

Malcolm.