Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v1ELIpma030847 for ; Tue, 14 Feb 2017 22:18:52 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cdkPw-0002If-PT for rs_out_1@blacksheep.org; Tue, 14 Feb 2017 21:13:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cdkPT-0002IS-6G for rsgb_lf_group@blacksheep.org; Tue, 14 Feb 2017 21:13:15 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cdkP9-00056B-6f for rsgb_lf_group@blacksheep.org; Tue, 14 Feb 2017 21:13:12 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=PeqHhuhZX5ptX/j+mh6ObbxPYLrvzdGT9QXH0KMw0MI=; b=EgNO9LL/Wto1qUaWcF1cnlXpVU edbvgIb+AEDlXRXhSvhQnSHAZgQHlqEJKR+cCD6+wtKBy+akIJX7ndYxkp9luymZHJTWeeHmsZy+E GdXfSerOkiWwtg+1LdqGgSfBAotJxuroR91tZeN3zHo44MwOiQrRBv25qnZbgpB8Jhp8=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:44132 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.88) (envelope-from ) id 1cdkP8-0006CR-Hy for rsgb_lf_group@blacksheep.org; Tue, 14 Feb 2017 21:12:54 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id EEE62400920 for ; Tue, 14 Feb 2017 21:12:53 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <03503513-9732-902a-bbcd-46b7b6bd3bf3@df3lp.de> From: Paul Nicholson Message-ID: <231c3421-75c2-3146-a8eb-e9469831d8ac@abelian.org> Date: Tue, 14 Feb 2017 21:12:53 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <03503513-9732-902a-bbcd-46b7b6bd3bf3@df3lp.de> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: Raspberry Pi sound interface that works Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 10592 Peter wrote: > I'm running an experimental remote receiver based > on the Wolfson/Cirrus audio deck since March 2015 > on the RPi-A+ and now RPi-3. I waited around for a year for the drivers to get included in Raspbian, then gave up. Perhaps I should have another look at it. Thanks for the warning about the SD cards, that's something to bear in mind. Meanwhile, testing of the Audio Injector goes well and I've noticed a temperature dependence of the output phase from ebsynth, I suspect it must be the large capacitors on either the reference input or the signal output. What else could it be? It's of the order of -1 deg of phase per deg C, something like that. Quite bad but fixable with a soldering iron I hope! Here's the output phase as I put a lid over the RPi and audio so it warms up for about 900 seconds, then I take the lid off to let it cool - http://abelian.org/vlf/tmp/170214c.gif At least so far, no sign of any lost samples (would show up as a phase step). -- Paul Nicholson --