From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id 5105FE00782; Thu, 22 Jan 2015 10:35:44 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] Received: from mail.chez-thomas.org (mail.mlbassoc.com [65.100.170.105]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id E4CC3E00571 for ; Thu, 22 Jan 2015 10:35:39 -0800 (PST) Received: by mail.chez-thomas.org (Postfix, from userid 1998) id 7D12FF811DC; Thu, 22 Jan 2015 11:35:37 -0700 (MST) Received: from [192.168.1.114] (zeus [192.168.1.114]) by mail.chez-thomas.org (Postfix) with ESMTP id D2E10F811DC; Thu, 22 Jan 2015 11:35:36 -0700 (MST) Message-ID: <54C1430A.6050303@mlbassoc.com> Date: Thu, 22 Jan 2015 11:35:54 -0700 From: Gary Thomas User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Nikolay Dimitrov , meta-freescale@yoctoproject.org References: <54BED2E8.70901@mail.bg> <54BEF411.9080503@mail.bg> <54BF0F40.6030407@mail.bg> <54C03C72.3050502@mail.bg> <54C0F9FE.6020208@mlbassoc.com> <54C14241.4090805@mail.bg> In-Reply-To: <54C14241.4090805@mail.bg> Subject: Re: Audio glitch with SGTL5000 X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Jan 2015 18:35:44 -0000 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit On 2015-01-22 11:32, Nikolay Dimitrov wrote: > Hi Gary, > > On 01/22/2015 03:24 PM, Gary Thomas wrote: >> Are you using headphone or line-out? >> >> My i.MX6 boards all suffer from this annoying pop - it would be great >> to get to the bottom of this. > > Before applying my ugly fix, I can hear the glitch on both outputs, but need to warn you that my headphones test is flawed, as the SGTL5000 codec on my board is improperly > connected to the headphones (audio output is only 2-wire DC-decoupled instead of using 3-wire cap-less output with virtual ground). > > Are you looking for a fix for line-out, headphones, both? Also, which kernel are you using? Currently, only headphones. I'm using linux-boundary/3.10.31 -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------