How to convert .m4a audio files to .mp3 command line? (with no deterioration in quality, if possible). Ubuntu 16.04LTS media info:
General
Complete name : show.m4a
Format : MPEG-4
Format profile : Apple audio with iTunes info
Codec ID : M4A (M4A /mp42/isom)
File size : 55.5 MiB
Duration : 1h 48mn
Overall bit rate mode : Variable
Overall bit rate : 71.7 Kbps
Audio
ID : 1
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : 40
Duration : 1h 48mn
Bit rate mode : Variable
Bit rate : 72.0 Kbps
Maximum bit rate : 93.8 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz / 22.05 KHz
Frame rate : 21.533 fps (1024 spf)
Compression mode : Lossy
Stream size : 54.9 MiB (99%)
Writing library : Nero AAC codec 1.5.4.0
Encoding settings : -q 0.25
