From mboxrd@z Thu Jan 1 00:00:00 1970 From: asbjs@stud.ntnu.no (Asbjørn Sæbø) Subject: Re: Minimum period size of M-Audio Delta 44? Date: Fri, 9 Sep 2005 16:10:31 +0200 Message-ID: <20050909141031.GA23500@stud.ntnu.no> References: <20050909104023.GA25499@stud.ntnu.no> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: 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: Clemens Ladisch Cc: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org On Fri, Sep 09, 2005 at 03:48:18PM +0200, Clemens Ladisch wrote: > Asbj=F8rn S=E6b=F8 wrote: > > What is the minimum period size of the M-Audio Delta 44 soundcard whe= n > > running under ALSA? >=20 > The snd-ice1712 driver uses a minimum period size of 80 bytes. So the period size is given in bytes, not in frames or samples? (Well, they are of course closely coupled.) > > (I am thinking of bying such a card, but would prefer the > > attainable latency to be low.) >=20 > The ICE1712 chip uses 40 bytes per frame (ten channels with 32 bits), > so the minimum latency at 96 kHz would be 0.02 milliseconds. That should suffice ;-) The Delta 44 is a four-channel device. If the chip is capable of 10=20 channels, what happens to the other six? Thanks! Asbj=F8rn ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf