From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Schumacher Marlon Newsgroups: gmane.comp.audio.sox.devel Subject: question about noiseprof Date: Thu, 5 Jun 2014 16:09:26 -0400 Message-ID: Reply-To: sox-devel@lists.sourceforge.net NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.2\)) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1401998991 19141 80.91.229.3 (5 Jun 2014 20:09:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Jun 2014 20:09:51 +0000 (UTC) To: sox-devel@lists.sourceforge.net Original-X-From: sox-devel-bounces@lists.sourceforge.net Thu Jun 05 22:09:41 2014 Return-path: Envelope-to: gcasd-sox-devel@m.gmane.org X-ACL-Warn: X-Mailer: Apple Mail (2.1878.2) X-PMX-VERSION: 5.6.1.2065439, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2014.5.28.130619 X-McGill-WhereFrom: Internal X-Spam-Score: -0.7 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Headers-End: 1Wsdye-0007oj-RS X-BeenThere: sox-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: sox-devel-bounces@lists.sourceforge.net Xref: news.gmane.org gmane.comp.audio.sox.devel:369 Archived-At: Received: from lists.sourceforge.net ([216.34.181.88]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Wsdym-0007sB-5A for gcasd-sox-devel@m.gmane.org; Thu, 05 Jun 2014 22:09:40 +0200 Received: from localhost ([127.0.0.1] helo=sfs-ml-3.v29.ch3.sourceforge.com) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Wsdyh-00059k-VI; Thu, 05 Jun 2014 20:09:36 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Wsdyg-00059b-HL for sox-devel@lists.sourceforge.net; Thu, 05 Jun 2014 20:09:34 +0000 Received: from edgesmtp2.ncs.mcgill.ca ([132.206.27.53]) by sog-mx-3.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1Wsdye-0007oj-RS for sox-devel@lists.sourceforge.net; Thu, 05 Jun 2014 20:09:34 +0000 Received: from edgemx6.ncs.mcgill.ca (edgemxdb6.ncs.mcgill.ca [132.206.27.72]) by edgesmtp2.ncs.mcgill.ca (Postfix) with ESMTP id 6357F300053 for ; Thu, 5 Jun 2014 16:09:27 -0400 (EDT) Received: from edgemx6.ncs.mcgill.ca (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id 4D166CD8048 for ; Thu, 5 Jun 2014 16:09:27 -0400 (EDT) Received: from [132.206.14.160] (unknown [132.206.14.160]) by edgemx6.ncs.mcgill.ca (Postfix) with ESMTP id 2FBC6CD803F for ; Thu, 5 Jun 2014 16:09:27 -0400 (EDT) Hello, I would just like to ask if someone could shed some light on what the [noiseprof] effect is actually doing. Is it outputting a 1024 point time-averaged-spectrum? Does it apply windowing/ola when analyzing the audio? It seems to be a power spectrum but what are the actual values that are actually written into the noiseprofile file? Magnitude in dB? (they seem to be somewhat centered around '0') I tried looking at the source (noiseprof.c) but I'm not enough into C to really understand the code. Any help/hints would be greatly appreciated. Thanks very much. Marlon ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech