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"


Tags:

normalize, volume, linuxm, format, convert, wav, converted, resulting, mp, universally, playable, sudo, apt, install, mpg, faad, quot, software, mpeg, aac, decoder, copyright, ag, http, www, audiocoding, redistribute, modify, gnu, info, lc, secs, ch, hz, audio, computing, levels, eta, batch, applying, db, config, decoding, parameter, manual, decibel,

Latest Articles

  • How to allow SSH root user access in Linux/Debian/Mint/RHEL/Ubuntu/CentOS
  • Ansible Tutorial - Playbook How To Install From Scratch and Deploy LAMP + Wordpress on Remote Server
  • Ceph Install Errors on Proxmox / How To Fix Solution
  • Proxmox Update Error https://enterprise.proxmox.com/debian/pve bullseye InRelease 401 Unauthorized [IP: 144.217.225.162 443]
  • QEMU/KVM How to Hot-add A Virtual Disk .raw/.qcow2 via QEMU Monitor Commands
  • Proxmox How To Enable Ceph Distributed Storage Cluster with OSD and Pools
  • pulseaudio issue on QEMU/KVM guest VM when microphone is replugged/unplugged pulseaudio: pa_threaded_mainloop_lock failed pulseaudio: Reason: Invalid argument
  • Ubuntu Linux Mint - Volume Control Stopped Working
  • Proxmox Services Won't Start Failed to start The Proxmox VE cluster filesystem. Proxmox VE firewall. PVE Status Daemon. Proxmox VE scheduler. PVE Cluster HA Resource Manager Daemon. PVE Local HA Resource Manager Daemon.
  • Proxmox Guide FAQ / Errors / Howto
  • Virtualbox Vbox Issue Cannot Enable Nested Virtualization Button is Grayed/Greyed Out and Unclickable HowTo Solution
  • Virtualbox VBOX Howto Port Forward To Guests
  • Linux Ubuntu Debian Centos Mint - How To Check if Intel VT-x or AMD-V Hardware Virtualization is Enabled?
  • Linux Howto Zip Multiple Files and Directories
  • Windows Cannot Format USB drive Device Media is Write Protected Error Solution
  • Linux Mint 20 cannot install snapd missing solution
  • Virtualbox VBOX How To Install Guest-Utils/GuestUtils so drag and drop and clipboard works Ubuntu Mint Debian Linux
  • How to install Kubernetes with microk8s and deploy apps on Debian/Mint/Ubuntu Linux
  • vi how to delete everything to the end of the line or the rest of the line from the cursor
  • Cisco Howto Configure Console Port/Terminal/Comm Server with Async Cable Setup