From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Erich Eckner Newsgroups: gmane.comp.audio.sox Subject: Re: volume extremely low when combining many files Date: Sat, 24 Sep 2016 19:14:25 +0200 Message-ID: References: <99482240-79ac-4767-c935-d63238eb374a@eckner.net> <1d05af1827f0efc7968990aea4b54e3e@wingsandbeaks.org.uk> <6C04A1EE-C25C-48BB-AFD9-9D8EEF08E0D1@gmail.com> <52F5EE64-C87E-4A1A-A611-565F42DC1922@gmail.com> <7a8da1cc-5e0c-9fa3-a2cf-ab3b0c588fcf@eckner.net> <20160924154154.psuxcpxgis6lbs6w@www.stare.cz> Reply-To: sox-users@lists.sourceforge.net NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6976704006896595524==" X-Trace: blaine.gmane.org 1474737313 30641 195.159.176.226 (24 Sep 2016 17:15:13 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 24 Sep 2016 17:15:13 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 To: sox-users@lists.sourceforge.net Original-X-From: sox-users-bounces@lists.sourceforge.net Sat Sep 24 19:15:09 2016 Return-path: Envelope-to: gcas-sox-users@gmane.org X-ACL-Warn: X-No-Relay: not in my network X-Hashcash: 1:22:160924:sox-users@lists.sourceforge.net::4hmdI0AFBUeoAZBC:000000 000000000000000000000000ASQL In-Reply-To: <20160924154154.psuxcpxgis6lbs6w@www.stare.cz> X-Headers-End: 1bnqX9-0002WU-3e X-BeenThere: sox-users@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-users-bounces@lists.sourceforge.net Xref: news.gmane.org gmane.comp.audio.sox:6299 Archived-At: Received: from lists.sourceforge.net ([216.34.181.88]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bnqXS-00069x-4H for gcas-sox-users@gmane.org; Sat, 24 Sep 2016 19:14:58 +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 1bnqXC-0003Ot-7U; Sat, 24 Sep 2016 17:14:42 +0000 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1bnqXA-0003On-N2 for sox-users@lists.sourceforge.net; Sat, 24 Sep 2016 17:14:40 +0000 Received: from v1.homerecords.de ([62.141.45.186]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1bnqX9-0002WU-3e for sox-users@lists.sourceforge.net; Sat, 24 Sep 2016 17:14:40 +0000 Received: from [192.168.0.12] (cable-86-56-88-136.cust.telecolumbus.net [86.56.88.136]) by v1.homerecords.de (Postfix) with ESMTPSA id 6994C29411DF for ; Sat, 24 Sep 2016 19:14:32 +0200 (CEST) This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6976704006896595524== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="dRf3Pa7AolQA5qGHCB2JIdeJ2U8r9NrGq" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --dRf3Pa7AolQA5qGHCB2JIdeJ2U8r9NrGq Content-Type: multipart/mixed; boundary="xlOVleqOetVItjmtSlf85r8q4AAfFQwkr"; protected-headers="v1" From: Erich Eckner To: sox-users@lists.sourceforge.net Message-ID: Subject: Re: [SoX-users] volume extremely low when combining many files References: <99482240-79ac-4767-c935-d63238eb374a@eckner.net> <1d05af1827f0efc7968990aea4b54e3e@wingsandbeaks.org.uk> <6C04A1EE-C25C-48BB-AFD9-9D8EEF08E0D1@gmail.com> <52F5EE64-C87E-4A1A-A611-565F42DC1922@gmail.com> <7a8da1cc-5e0c-9fa3-a2cf-ab3b0c588fcf@eckner.net> <20160924154154.psuxcpxgis6lbs6w@www.stare.cz> In-Reply-To: <20160924154154.psuxcpxgis6lbs6w@www.stare.cz> --xlOVleqOetVItjmtSlf85r8q4AAfFQwkr Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Jan, I expected it to start with silence and was just checking, however Bobs file does _not_ start with silence, although he claimed to pad 10 seconds at the beginning. That's why I wanted to know the actual command in use. cheers, Erich On 24.09.2016 17:41, Jan Stary wrote: > On Sep 24 07:06:23, erich@eckner.net wrote: >> Hi Bob, >> >> can you post the command you used to generate that file? >> It is indeed not "silent" at the beginning: >> >>> sox sound77.wav -n trim 0 9 stats >> >> DC offset -0.000002 >> Min level -0.007812 >> Max level 0.007812 >> Pk lev dB -42.14 >> RMS lev dB -48.17 >> RMS Pk dB -47.83 >> RMS Tr dB -48.64 >> Crest factor 2.00 >> Flat factor 2.17 >> Pk count 99.0k >> Bit-depth 1/8 >> Num samples 397k >> Length s 9.000 >> Scale max 1.000000 >> Window s 0.050 >> >> However, if I do a pad: >> >>> sox sound77.wav test.wav pad 10 >=20 > The manpage says >=20 > pad { length[@position(=3D)] } > [...] > position is optional for the first and last lengths specified > and if omitted correspond to the beginning and the end of > the audio respectively. >=20 > So if I am reading this right, you are padding > with 10 seconds of silence at the beginning. >=20 > Then in particular the first 9 seconds is silence: >=20 >> and analyze the result, it's silent: >> >>> sox test.wav -n trim 0 9 stats >> DC offset 0.000000 >> Min level 0.000000 >> Max level 0.000000 >> Pk lev dB -inf >> RMS lev dB -inf >> RMS Pk dB -inf >> RMS Tr dB -inf >> Crest factor 1.00 >> Flat factor 111.97 >> Pk count 794k >> Bit-depth 0/0 >> Num samples 397k >> Length s 9.000 >> Scale max 1.000000 >> Window s 0.050 >=20 > Jan >=20 >=20 > -----------------------------------------------------------------------= ------- > _______________________________________________ > Sox-users mailing list > Sox-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sox-users >=20 --xlOVleqOetVItjmtSlf85r8q4AAfFQwkr-- --dRf3Pa7AolQA5qGHCB2JIdeJ2U8r9NrGq Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJX5rR3AAoJEAruyQdV2ntadWMQALO+OVX9RSMUsK7hDwH1L1Mz P5SvBu+qRYzFOgok2kHZDHD+PhWI4Axvxs0zx+k2mRg59kL2KSgfP233ronVoXpu 5PvZy/k5Hs0nnswwN03GvjY1M/YWATJr/vr+HBAvvp38lVRGBNMadq5dA/NIqcYg MQR+7GyU9Z/aLiB/6MG4ix+nAfxvHDJk1VFsCt/KB+0PI1LXPOPKLBxHDclgXlLf 4QqP560PkupZ0sPIjDvydBFMXxPaIsahbFVAZ3VqqOGmnX7Kfrocdpu/tAa3vcdi AXKEitKtiovDh9h9qpCm7WKOQl5vofzESg6tYD9wmyNocaw2CB21lpZYEgQ7phSK wIIbCIDr8IYCk9OKagzGzSxW9dnTJhP4ZcqpKracTbxAthPrdNtpLG5AnSAcs+Cp 4ai6DWmhWB7TYN+Ed0xGoJ6A4PB6A5EBJo1mzzAOEVlFcGX8mCPfyMijlDaCWfkB Cfd+FsYYKgI1XhpnQy5dnfi0pFa5jcp0i+xsZRaw3O7yGkBLLlLZy1u7+1TU7PiS Y04VW6wr2jSa2PHygfsnvRrlcDlsNO2fpyeVTFss027+XK9rT/4ir5hJtuTGXZWW BBJwTZ1H8V7ciV53pS4D34nyHbdkSLYcwLZW/51Qb2v2NAPABH1qqFFvFuY+zS7A PtZhNC15czCcjUjcaUtE =eWdz -----END PGP SIGNATURE----- --dRf3Pa7AolQA5qGHCB2JIdeJ2U8r9NrGq-- --===============6976704006896595524== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------------ --===============6976704006896595524== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Sox-users mailing list Sox-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sox-users --===============6976704006896595524==--