From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Clemens Ladisch" Subject: Re: question about sampling rate Date: Thu, 31 Aug 2006 10:17:17 +0200 Message-ID: <1157012237.11592.269833216@webmail.messagingengine.com> References: <54799.217.150.108.178.1152694606.squirrel@newgolddream.dyndns.info> <20060714173102.GA13816@turing.informatik.uni-halle.de> <7034e7b50607172213mbde1845occ78b95b17914563@mail.gmail.com> <20060718071150.GA11917@turing.informatik.uni-halle.de> <7034e7b50607180021u5605f818v9c5e55edb1023903@mail.gmail.com> <20060718143423.GB15467@turing.informatik.uni-halle.de> <7034e7b50607181827u6ddc9cb5s8585978e80a7af9b@mail.gmail.com> <20060719122905.GB24800@turing.informatik.uni-halle.de> <7034e7b50608091945r39ddaeeevda675f05251be9cb@mail.gmail.com> <1155315961.10237.268179763@webmail.messagingengine.com> <7034e7b50608302232w2b7279b3qf66acaeca54f1e2b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from out1.smtp.messagingengine.com (out1.smtp.messagingengine.com [66.111.4.25]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id 0672721A for ; Thu, 31 Aug 2006 10:17:19 +0200 (MEST) Content-Disposition: inline In-Reply-To: <7034e7b50608302232w2b7279b3qf66acaeca54f1e2b@mail.gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@lists.sourceforge.net Errors-To: alsa-devel-bounces@lists.sourceforge.net To: Grace Baldonasa Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Grace Baldonasa wrote: > I am dividing the buffer size into 20 ms, in the given example, I am > sending 176 bytes / packet. This would correspond to a sample rate of 44000 Hz. You cannot use a constant number of bytes per packet at 44100 Hz. > I have here another scenario and I hope you can give me some idea again. > I have converted a song using this configuration: > sampling rate = 32000 > bit resolution = 16 > channel = stereo > after this computation (32000*16*2) * 2 -> 128/packet > > I used a speaker which is supporting a minimum frequency of 44100 and > maximum of 48000. How can I adjust my streaming size now that the streaming > configuration far below than the minimum supported by the speaker. See section 5.12 of the USB 2.0 specification. > I attached this speaker in windows and then played the converted file, it > is sending 192bytes/packet, and the total bytes transffered had almost > trippled the original size of the converted file. Apparently, Windows has converted the data to 48 kHz. Regards, Clemens ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642