From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manuel Jander Subject: Terratec Aureon 5.1 MKII slow Date: Thu, 22 Sep 2005 18:17:44 +0200 Message-ID: <21ed1c3705092209171817de22@mail.gmail.com> Reply-To: Manuel Jander Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_3467_9244076.1127405864539" Return-path: Received: from zproxy.gmail.com (zproxy.gmail.com [64.233.162.192]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id B736012A for ; Thu, 22 Sep 2005 18:17:45 +0200 (MEST) Received: by zproxy.gmail.com with SMTP id 4so283616nzn for ; Thu, 22 Sep 2005 09:17:44 -0700 (PDT) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org ------=_Part_3467_9244076.1127405864539 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi, I have been experimenting with 5.1 USB devices. I'm using them on a Linksys NSLU2. Some interfaces are reasonable fast, some are extremely slow due to software sample rate conversion. Now I'm using a Aureon 5.1 MKII. AFAIK it does hardware samplerate conversion, but its significantly slower than another "GIGAPort AG" I have around here. Can anyone (maybe the driver author) tell me why is this adapter so slow ? Could it be possible to make it faster tweaking the driver perhaps ? Why is the maximum buffer so small ? It is just so small, so I'm forced to add some bigger buffering by my self, creating even more overhead :( I would have expected that on a USB device the PCM buffer could be arbitrar= y large, so why is it so small ? Thanks you very much for any advice. Best Regards Manuel Jander ------=_Part_3467_9244076.1127405864539 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi,

I have been experimenting with 5.1 USB devices. I'm using them on a Linksys= NSLU2. Some interfaces are reasonable
fast, some are extremely slow due to software sample rate conversion.
Now I'm using a Aureon 5.1 MKII. AFAIK it does hardware samplerate conversion, but its significantly slower than another "GIGAPort AG&quo= t;
I have around here.

Can anyone (maybe the driver author) tell me why is this adapter so slow ? Could it be possible to make it faster tweaking the driver perhaps ?
Why is the maximum buffer so small ? It is just so small, so I'm forced to add some bigger buffering by my self, creating even more overhead :(
I would have expected that on a USB device the PCM buffer could be arbitrar= y large, so why is it so small ?

Thanks you very much for any advice.

Best Regards
Manuel Jander

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