Subject: Re: [linux-audio-user] Quattro USB
From: Ryan (ruinaudio_AT_comcast.net)
Date: Thu Apr 22 2004 - 21:46:30 EEST
I use the emagic emi 2|6 which has 2.6.x kernel firmware support (along
with the 6|2). It has worked quite reliably for me (though I've never
performed with it on linux, only mac).
The jackd/usb thing has been rough on me also. Be aware, you will not
get reliable low latency audio with any usb device currently. At one
point I was told that there are workarounds that would help usb latency
but;
1) the timing of the jackd development cycle wasn't right to address it
2) none of the jackd developers care for USB audio and therefore fixing
it's not a priority
I really like the emi 2|6 but... as I've said I'm a bit saddened by it's
poor jackd performance.
For those of us who are 'mobile' usb is the only solution and firewire
suffers the same shortcomings (so no options left, short of shelling out
big bucks for pcmcia), don't know if we'll see any love... I've proposed
taking up a collection or setting a bounty on jackd/usb support before.
IIRC only one other person thought it a good idea.
-ry
On Wed, 2004-04-21 at 14:10, Wade Winright wrote:
> First, I would like to thank everyone for their advice and opinions. THey have
> been extremely valuable to me.
>
> Can anyone else back up the Emagic 6|2m statement? Does it really work? I see
> no reference to it on alsa-project.org.
>
> If this is a decent working usb solution, I'll probably jump on it.
> Thanks again,
> Wade
>
> On Wednesday 21 April 2004 3:56 am, Clemens Ladisch wrote:
> > Reuben Martin wrote:
> > > > As I am only in the posession of a laptop, PCI is not an option.
> > > > Are there any PCMCIA otions out there, or should I wait until
> > > > Firewire/USB 2.0 becomes more available?
> > >
> > > I don't think the audio spec changes with USB 2.0.
> >
> > Indeed. USB 2.0 has 8000 subframes per second, but this doesn't
> > change things much.
> >
> > > That would make backwards compatability a little tough, but I may
> > > be wrong.
> >
> > The USB 2.0 spec says that 2.0 devices should work in 1.x mode, too.
> >
> > The only 2.0 device tested so far is the Audigy 2 NX, and it doesn't
> > really work. (It doesn't work in 1.x mode, either, so I think the 2.0
> > support in the driver isn't broken.)
> >
> > > Wade Winright wrote:
> > > > Not having purchased the Quattro yet, can you or anyone else
> > > > reccomend the Quattro, or is there a better USB multi-input unit
> > > > out there that I should look at?
> >
> > Edirol devices usually work reliably with Linux. However, the only
> > device with more than two inputs is the UA-1000, having ten inputs and
> > outputs, which may be more than you want.
> >
> > AFAIK the Emagic EMI 6|2m works.
> >
> >
> > HTH
> > Clemens
>
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