From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Shirkey Subject: USB recording - repetitive peaks Date: Tue, 02 Jul 2002 23:28:08 +0900 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3D21B878.8090902@boosthardware.com> References: <3D208C5C.36649172@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Cc: alsa-devel@lists.sourceforge.net, tiwai@suse.de List-Id: alsa-devel@alsa-project.org Thanks to your patch Takashi we have two people who have been able to record through the quattro. We have both found that there is a constant repetitive peak in the signal which reminds me of the problems I had with the cmipci for a brief period. Thorsten Hass has recorded a perfect example for you which he did using aplay and arecord. It is a sine wave so is easy on the ears. http://www.thorstenhaas.de/alsa/audio.file He has also generated a jpeg plotted by an oscilloscope while recording which I can send you if it will help. He has also asked if there is any chance you will have time to look at this in the two weeks. I believe he has to do some work with his device so needs to make a decision about which OS to use for the job. -- Patrick Shirkey - Boost Hardware Ltd. For the discerning hardware connoisseur Http://www.boosthardware.com Http://www.boosthardware.com/LAU/guide/ ======================================== ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf