[PlanetCCRMA] Re: YAUAQ (yet another USB audio question): Roland UA-25

[Diemo Schwarz]

Hi Luis,

I took the liberty to cc this to both interested lists.

Luis Garrido wrote:
 > Hi, Diemo.
 >
 > I saw this message of yours at the planet CCRMA forum. Did you acquire
 > this unit?
 >
 > I bought myself an UA-25 unit and I am having a hard time making it work
 > with Agnula DeMuDi. So far I got the audio part working, but in a choppy
 > noisy way.

I had the chance to try a UA-25 on Linux with an old distibution (RH 8) and 
ALSA (0.96).  With the standard usb-audio module, and when the device is set to 
   basic mode, audio i/o works (analog and digital), presumably in 16bit, but 
no MIDI (didn't try too hard, though).

 > Before downloading the Fedora/CCRMA stuff, I would be grateful if you
 > could tell me whether you succeeded or not in making it work under this
 > distro.

I haven't made it to upgrade to ALSA 1.0.7 yet, which claims support for this 
card.  I don't know which ALSA version comes with the latest PlanetCCRMA/FC3, 
the page 
http://ccrma.stanford.edu/planetccrma/software/system.html#SECTION000411200000000000000
stops at FC1, and the directories for fedora can't be listed (server config 
error?).

> Besides, when I power up my UA-25 I hear a high frequency hiss coming 
> from the unit itself (not the speakers). After some time of the unit 
> being powered (around 5 minutes) I can cut the hiss by pressing the 
> Mon.Sw. button. Did you experience such a noise?

Ah!  That explains what I experienced twice.  I always thought it was my 
cables that were faulty and some wiggling did remove the hiss!  Thanks for 
pointing this out!

BTW:  There is now a heavy contender, but with firewire, alas.  (Any news about 
firewire audio for Linux, anyone?):

http://presonus.com/firebox.html
6 in, 10 out, SPDIF, MIDI, bus or externally powered
Insiders claim it has two very good sounding preamps, as that's where Presonus 
came from.

Cheers...
								...Diemo


> Best regards,
> 
> Luis
 >
 >> Diemo wrote:
>> Hi all,
>>
>> Roland have a new mobile USB interface out, the UA-25:
>>
>> http://www.edirol.com/products/info/ua25.html
>>
>> (Everything I need: 2 chan, 24bit, Mic in, digital i/o, Midi, with 
>> 500g half
>> the weight of the Tascam US-122 http://www.tascam.de/en/us-122.html)
>>
>> Can anyone say if it will work with Linux?  Anything about 
>> compatibility with
>> the existing ALSA USB audio drivers (that work with the UA-20, for 
>> instance)?
>>
>> Cheers...
>>                                 ...Diemo

-- 
Diemo Schwarz, Ph.D.  --  http://www.ircam.fr/anasyn/schwarz
Real-Time Applications Team  --  http://www.ircam.fr/equipes/temps-reel
IRCAM - Centre Pompidou  --  1, place Igor-Stravinsky, 75004 Paris, France
Phone +33-1-4478-4879  --  Fax +33-1-4478-1540