From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonas Petersen Subject: M-Audio Delta 1010LT: S/PDIF clock source not working Date: Fri, 05 Apr 2013 17:34:40 +0200 Message-ID: <515EEF10.1020007@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bk0-f42.google.com (mail-bk0-f42.google.com [209.85.214.42]) by alsa0.perex.cz (Postfix) with ESMTP id C95F2265FFA for ; Fri, 5 Apr 2013 17:34:42 +0200 (CEST) Received: by mail-bk0-f42.google.com with SMTP id jc3so2176653bkc.1 for ; Fri, 05 Apr 2013 08:34:42 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel Cc: Pavel Hofman List-Id: alsa-devel@alsa-project.org Hi, I am trying to capture from S/PDIF. I get a signal but the clocking is broken somehow. I have 'Multi Track Internal Clock' on 'ICE958 Input'. 'Word Clock Status' and 'Word Clock Sync' are 'Off'. What happens is the following: It captures what comes in on S/PDIF but it seems it will always use the internal clock with the setting from 'Multi Track Internal Clock Default'. So even though 'Multi Track Internal Clock' is on 'ICE958 Input', the setting of 'Multi Track Internal Clock Default' will clock the signal. A 1 kHz sine wave at 48 kHz samplerate captured with 'Multi Track Internal Clock Default' on 96 kHz will result in a 2 kHz sine. When the sample frequency rates are matched, it will capture at correct rate but with hiccups due to the rates not perfectly aligned. What can I do narrow down the cause? Reards Jonas