From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Shirkey Subject: Re: usb audio sound quality Date: Fri, 08 Nov 2002 18:18:13 +0900 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3DCB8155.5000202@boosthardware.com> References: <3DC97C55.6000507@boosthardware.com> <3DCAE7C8.5030808@boosthardware.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from www7.networkshosting.com (www7.networkshosting.com [66.96.128.106]) by alsa.alsa-project.org (8.9.3/8.9.3/SuSE Linux 8.9.3-0.1) with SMTP id KAA05094 for ; Fri, 8 Nov 2002 10:29:30 +0100 Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Patrick Shirkey wrote: > I'm getting a lot of wierd sound quality bugs while using JACK. It seems > like the driver is storing the crappyness somewhere and each time I > access it the quality gets worse. Is it possible that the driver could > allow the data to linger and make things unstable? > > I have been doing some testing today with various softsynths and my mem > is getting pretty full. Turning off jack just freed up 10MB but still > it's at > > Mem: 386484K total, 336212K used, 50272K free, 41304K buffers > > The machine has been up for 7 hours. Is that reasonable? > I have just tested a cool machine with native alsa and the quality is crystal clear. Testing with JACK caused and through alsa while running JACK caused the degradation again. I will work on the assumption that means that the stress of running JACK is the culprit of audio quality degradation and I guess that ssm (and possibly JACK) has some mem leaks. Thanks for your work Takashi and Clemens. -- Patrick Shirkey - Boost Hardware Ltd. For the discerning hardware connoisseur Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman ------------------------------------------------------- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power & Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en