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<div>I used to work with the UA-25 ex on Linux and it was flawless in jack and alsa.<br/>
<3 linux audio</div>
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As far as I remember, I just installed KXstudio on a fresh Ubuntu <a href="http://kxstudio.linuxaudio.org/index.php">http://kxstudio.linuxaudio.org/index.php</a></div>
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<div>So cool, as there is already lots of good stuff coming with it. </div>
<div>For Jack I worked with QJackcontrol, here you can also do the routing (or with Catarina, Catia or Claudia?). </div>
<div>Make sure, the buffer ok and latency settings are big enough.</div>
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It seems that interface has two different modes of operation, basic (USB<br/>
audio class 1.0) and advanced (seems to be proprietary, not fully USB<br/>
audio 2.0 class compliant), and has hardware controls to set sample rate.<br/>
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<div>no the contrary, as I remember, advanced mode has to be turned off before connecting or booting.<br/>
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You can also try Renoise, Bitwig or Pure Data to know if it's a problem of Ardour<br/>
(and maybe start them from the terminal for reading errors and you can look into their logfiles, too).</div>
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