How to Normalize and Increase the Volume on M4A files in Linux -

How to Normalize and Increase the Volume on M4A files in Linux

M4A is a weird format, so you have to be creative here is a quick copy of what I did. 

Basically you need to convert to .wav to make use of them and then I converted the resulting .wav into an mp3 (nice small file size and basically universally playable):

 

=======

 

sudo apt-get install mpg321 mp3gain faad normalize lame

 faad "Voice 002 (copy).m4a"

faad "Voice 002 (copy).m4a"
 *********** Ahead Software MPEG-4 AAC Decoder V2.7 ******************

 Build: May  1 2012
 Copyright 2002-2004: Ahead Software AG
 http://www.audiocoding.com
 Floating point version

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License.

 **************************************************************************

Voice 002 (copy).m4a file info:

LC AAC    4107.565 secs, 2 ch, 44100 Hz


normalize-audio "Voice 002 (copy).wav"
Computing levels...
 Voice 002 (copy). 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Applying adjustment of 6.22dB to Voice 002 (copy).wav...
 Voice 002 (copy). 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)

  ---------------------
 | Config:  2 Ch       |
  ---------------------
 | Ch |    Position    |
  ---------------------
 | 00 | Left front     |
 | 01 | Right front    |
  ---------------------

Decoding Voice 002 (copy).m4a took: 45.95 sec. 89.39x real-time.



# not loud enough?
#run again with the -g parameter and the manual decibel increase
normalize-audio -g 20 "Voice 002 (copy).wav"

#convert to mp3

lame "Voice 002 (copy).wav"


  • wget how to resume download!
  • strange vi errors in Linux Mint/Ubuntu line 58: E488: Trailing characters: t_Sbet line 63: E171: Missing :endif
  • MySQL Add multiple IPs for remote user including root howto
  • cPanel error Access denied for user 'root'@'localhost' when adding remote MySQL IP address solution
  • Text Editors - Top Linux Ubuntu/Debian/Mint Options
  • Linux shows my drive as being dead is it really? Buffer I/O error on device sdb, logical block 0 sd 3:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  • use ffmpeg to watermark videos if mencoder/bmovl fail
  • mencoder bmovl error vf_bmovl: Unknown command: ''. Ignoring.
  • Linux Mint/Ubuntu/Debian Nvidia driver becomes slow graphics performance issue
  • Linux Mint missing ffmpeg solution to install from Ubuntu PPA
  • phpBB3 slow and internal dummy connection
  • check if Apache uses worker MPM or prefork MPM
  • text to speech for Linux
  • How to convert xlsx/xls Excel file into csv
  • Linux bash script how to generate a random password using /dev/urandom
  • ssh forward multiple ports in the same connection and command even works with NAT!
  • How to create openssl md5 password hash to use in /etc/shadow using bash
  • Avocent DSR8020 KVM/IP - Network Connect Error - Solution
  • PHP Parse error: syntax error, unexpected '[' in phpBB3/vendor/react/promise/src/functions.php on line 15
  • tar extraction changes ownership of /root directory