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: EATSERVER: mailn 1166; 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+deb8u2) with ESMTP id v6LGr1bb011391 for ; Fri, 21 Jul 2017 18:53:02 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dYb6H-0005Fu-Ah for rs_out_1@blacksheep.org; Fri, 21 Jul 2017 17:48:25 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dYb6G-0005Fl-IC for rsgb_lf_group@blacksheep.org; Fri, 21 Jul 2017 17:48:24 +0100 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 4.89) (envelope-from ) id 1dYb6D-0001F1-NP for rsgb_lf_group@blacksheep.org; Fri, 21 Jul 2017 17:48:23 +0100 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=j2z+DYpgyRYok7IoaI4VHUIkQNrGX+lrKTRJ482DD5w=; b=BlFgUYEs9YhYYD8yxNxR6SlwZL rReiCmFylEb6NwWoH5Y8zzkyoViFAn+pLZY/+7ZFAoKCgbwGWEo4uEG63Qt2BoUcJaHUDGFY11NdF 8RdK961vq6h2+Wvl/kO86p+/F7OXzQ/7hgFaHyhYVICJgad76bHHxN0dla3qnknwxnoA=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:45756 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dYb6C-00033Y-5N for rsgb_lf_group@blacksheep.org; Fri, 21 Jul 2017 17:48:20 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 86F914000E3 for ; Fri, 21 Jul 2017 16:48:19 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <15ca21dc75e-1e15-bcda@webprd-m105.mail.aol.com> <510c15eb-b57a-0ebb-9037-1f83e0652cf2@sky.com> <933fcc32-d4c9-10cd-14b4-c179d66e27f9@abelian.org> <7ab80e0f-40d7-6b07-19c1-f4b256d47c52@sky.com> <594DB217.8060707@posteo.de> <2eb826d6-d299-7b37-cf64-f5bef6718f24@abelian.org> <595E4420.7060405@posteo.de> <595FB81A.5090606@posteo.de> <45775d6c-f091-37c0-0907-f01688c69b03@abelian.org> <5960BAC0.7000403@posteo.de> <5960D0B2.7030801@posteo.de> <6c1f8a0c-0dd6-ed42-cfe6-4a142e7bd3cd@abelian.org> <6991700d-fd34-7676-a182-507ea0fdae8e@abelian.org> <596208E4.5060803@posteo.de> <59626BE9.5060709@posteo.de> <65f24c4f-33f6-2925-15b9-0e5bb33efb87@abelian.org> <665fb30c-1b58-d7da-9d30-5ea775a461c5@abelian.org> <59720754.4080301@posteo.de> <59721F1D.7040904@posteo.de> From: Paul Nicholson Message-ID: Date: Fri, 21 Jul 2017 16:48:19 +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: <59721F1D.7040904@posteo.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: 33d261536bb1467bb13d5764461d5ec4 Subject: Re: LF: Octo-soundcard for the Raspi, another question 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: 12266 Looks like you got a result on the dropouts. Worth feeding back to the manufacturer - if anyone is still there. 48k/sec sampling should be fine, I haven't tested it on the Octo yet. Does the problem appear at 48k/sec when it gets hot enough? It probably needs to work up to 40C or more to be robust in the field. The DC/DC converter sounds marvelous - please tell us the part number! > Still need to manage to set the clok by gpsd, If not done already, install ntp with sudo apt-get install ntp ntpdate and gpsd with sudo apt-get install gpsd Then you just need some magic entries in the config file /etc/ntp.conf, find the bit that lists the servers, comment them all out with a # and put in server 127.127.28.0 minpoll 4 maxpoll 4 fudge 127.127.28.0 time1 0.051 refid GPS The time1 parameter is in seconds, tells gpsd roughly what the serial/USB comms delay is so that it can correct for it. You can tune that number after you get vttime running but it is not very important. Reboot for the change to take effect. Then the command ntpq -p to list the time sources, will show the GPS and time offset and jitter. It should have a '*' against it which indicates that ntp is using it. -- Paul Nicholson --