Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Tue, 6 Oct 2020 15:37:15 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 096MSYt0027531; Tue, 6 Oct 2020 18:29:02 -0400 Received: from outgoing-exchange-5.mit.edu (OUTGOING-EXCHANGE-5.MIT.EDU [18.9.28.59]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 096MSW9b027477 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 6 Oct 2020 18:28:32 -0400 Received: from oc11exedge1.exchange.mit.edu (OC11EXEDGE1.EXCHANGE.MIT.EDU [18.9.3.17]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 096MSFDT007608 for ; Tue, 6 Oct 2020 18:28:32 -0400 Received: from w92expo10.exchange.mit.edu (18.7.74.64) by oc11exedge1.exchange.mit.edu (18.9.3.17) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Tue, 6 Oct 2020 18:27:25 -0400 Received: from oc11exhyb2.exchange.mit.edu (18.9.1.98) by w92expo10.exchange.mit.edu (18.7.74.64) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Tue, 6 Oct 2020 18:28:16 -0400 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (104.47.55.169) by oc11exhyb2.exchange.mit.edu (18.9.1.98) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Tue, 6 Oct 2020 18:28:15 -0400 Received: from DM5PR04CA0027.namprd04.prod.outlook.com (2603:10b6:3:12b::13) by DM6PR01MB4954.prod.exchangelabs.com (2603:10b6:5:5b::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3455.21; Tue, 6 Oct 2020 22:28:14 +0000 Received: from DM3NAM03FT018.eop-NAM03.prod.protection.outlook.com (2603:10b6:3:12b:cafe::1) by DM5PR04CA0027.outlook.office365.com (2603:10b6:3:12b::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3433.37 via Frontend Transport; Tue, 6 Oct 2020 22:28:14 +0000 Received: from ussava.pair.com (209.68.5.169) by DM3NAM03FT018.mail.protection.outlook.com (10.152.82.200) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3433.34 via Frontend Transport; Tue, 6 Oct 2020 22:28:13 +0000 Received: from ussava.pair.com (localhost [127.0.0.1]) by ussava.pair.com (Postfix) with ESMTP id 0634D102D25 for ; Tue, 6 Oct 2020 18:28:13 -0400 (EDT) Received: from [192.168.0.4] (c-73-133-107-201.hsd1.md.comcast.net [73.133.107.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ussava.pair.com (Postfix) with ESMTPSA id E9A4B102D20 for ; Tue, 6 Oct 2020 18:28:12 -0400 (EDT) From: Chris Smolinski To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Tue, 6 Oct 2020 15:28:12 -0700 Subject: Re: [EE] Looking for technique to record audio after level exceeds some value Thread-Topic: [EE] Looking for technique to record audio after level exceeds some value Thread-Index: AdacMT5awcUD4ybmRZimiSYjRohTkA== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of blackcatsystems.com designates 209.68.5.169 as permitted sender) receiver=protection.outlook.com; client-ip=209.68.5.169; helo=ussava.pair.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mitprod.onmicrosoft.com; s=selector2-mitprod-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=wWbVfe/lM3HKt9lw7tWbBxvYkSqdG3DNvPIoQ5109HA=; b=XBQtPrjH/m5Iqh8VTmfzgMRU/YwNTjeTFpHeOU02TSOHbQutB4smj7dTywANhYi760c4vwi5frpZ08W9H8YXENTEMpMS5RLHvbCaQNQUDJENFs7y9+iGMQRWvmof1y4EnVXUf/JCha/82nZ23pewBJ3CxaOKNGeCxoBRC6owEbA= authentication-results: spf=pass (sender IP is 209.68.5.169) smtp.mailfrom=blackcatsystems.com; mit.edu; dkim=none (message not signed) header.d=none;mit.edu; dmarc=bestguesspass action=none header.from=blackcatsystems.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-topics: [EE] x-mime-autoconverted: from quoted-printable to 8bit by PCH.mit.edu id 096MSW9b027477 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 > On Oct 6, 2020, at 3:18 PM, Dwayne Reid wrote: >=20 >=20 > What I would like to do is to set up one of my spare Android devices=20 > with the microphone in the heating duct. But I need some way to have=20 > the device record just of few seconds BEFORE the explosion occurs as=20 > well as a few seconds AFTER the explosion occurs. >=20 > Kind of like how pre-trigger works with a DSO. >=20 > I've been looking but have not yet found an app that does this. I'm=20 > hoping that someone here might have a suggestion. >=20 > Note that I'm not married to the idea of using an Android device -=20 > just that's what I have handy. I could also set up a laptop or=20 > netbook running Windows or DOS if I can find an appropriate application. >=20 I have a program that can do just this, but... it's Mac only: https://www.b= lackcatsystems.com/software/macintosh-audio-recording-software.html It's not very resource hungry, if you have an old Mac in the basement it wo= uld probably work :) Chris Smolinski Black Cat Systems Westminster, MD USA https://www.blackcatsystems.com --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .