From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sinan Akman Subject: Re: Wandboard Quad - SPDIF issue, no sound Date: Thu, 26 Jun 2014 15:07:57 -0400 Message-ID: <53AC6F8D.6020101@writeme.com> References: <53A86CC5.2060204@dewberryfields.co.uk> <53A90D98.3050000@writeme.com> <53A991F4.9070905@dewberryfields.co.uk> <53AA0E8E.6030508@writeme.com> <53AAD9D3.2000107@dewberryfields.co.uk> <53AC2E59.1030601@dewberryfields.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from walmailout07.yourhostingaccount.com (mailout07.yourhostingaccount.com [65.254.254.77]) by alsa0.perex.cz (Postfix) with ESMTP id 96053265122 for ; Thu, 26 Jun 2014 21:08:01 +0200 (CEST) Received: from mailscan14.yourhostingaccount.com ([10.1.15.14] helo=walmailscan14.yourhostingaccount.com) by walmailout07.yourhostingaccount.com with esmtp (Exim) id 1X0F1c-0001xZ-L4 for alsa-devel@alsa-project.org; Thu, 26 Jun 2014 15:08:00 -0400 In-Reply-To: <53AC2E59.1030601@dewberryfields.co.uk> 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: Michael Howard Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hi Mike, I just saw this after I sent my other e-mail. > The volatges match the spec sheets, i.e. 5v for the Cubietruck and 3.3v > for the Wandboard at VCC whether audio is playing or not. Yes, this might be the issue. > So unless both my receivers have a problem with only 3.3v I'm at a loss. > I can't find anything on the limited specs for the receivers relating to > this. I think you can just test your receiver(s) with another 3.3v source and if you see the same problem then they probably need 5v levels. > I guess I'll just sideline the Wandboards and use proper kit instead. If it turns out that the voltage level is really the problem and you need to use those receivers I guess this would be the case. I am not electrical but you might be able to build a small adaptor to change the voltage levels on the spdif output. This would be another solution. Regards Sinan Akman