How to increase the volume in an m4a file?

Question

I have an m4a file. When listening to it on my iPod Touch, the volume is too low, even when I turn it all the way up.

I need to increase the volume in the file so that I can hear what is being said.

Also, in the background it sounds like there is a hissing sound that I'd like to get rid of.

I'm assuming you mean `m4v`, not "`m4b`"? – Nate Koppenhaver Nov 27 '11 at 20:45 — Nate Koppenhaver, Nov 27 '11 at 20:45
try [audacity](http://audacity.sourceforge.net/). – gadgetmo Jan 30 '12 at 19:11 — gadgetmo, Jan 30 '12 at 19:11

score 5 · Answer 1 · edited Jan 30 '12 at 17:43

5

I'd use mp3gain or AACGAIN for that. The former's GUI works with AACGAIN too, but AACGAIN is the app for m4as.

It'll let you batch modify the volume of files to a certain level without loss of quality.

edited Jan 30 '12 at 17:43

slhck

answered Dec 19 '09 at 13:57

Journeyman Geek

From looking at the web page for mp3gain, it looks like it's for averaging the volume of a set of MP3 files. Can it adjust the volume of a single file? – Marc Stober Mar 03 '16 at 12:09

ChrisF · Answer 2 · 2009-12-19T13:38:51.360

1

You need to look at "Auto Volume Levelling". This is done on your PC/MAC.

This page has instructions for iTunes as well as other music apps.

Though if you've got a background hiss already, this could get louder too. You'd need to look at some more serious filtering software for that.

edited Dec 19 '09 at 13:38

answered Dec 19 '09 at 13:13

ChrisF

2 Answers2