There is a lot of ways to increase volume in audio recording, take note the following before you increase volume :
a. Maximizing volume is important to make the music as loud as it can be without distortion.
b. Loudness is a subject in mastering although anyone would have the necessary tools to make the music as loud as possible.
The Importance of Headroom in the quest for “Loudness”
OK. You need to make it loud? Remember that in music production, it is not all about loudness but keeping the music dynamics as balanced as possible is an important objective.
As a rule, it is best to have the maximum amplitude of around -6 dB to -3dB during your mix down. This means that after mixing, there should be no peak louder than -3dB. The basic reason is to give some headroom during the mastering process.
If you are a serious music production professional (either as an engineer in recording, mixing and audio mastering); it is recommended you read the following tutorials regarding the importance of headroom:
a.) Introductory guide on appropriate gain staging -implement the proper recording levels during the tracking session.
b.) Assigning the right headroom for your mix – this will prepare your mix for mastering.
Quickest Tip to Maximize the Volume
This is for non-music production professionals and beginner in audio editing. OK supposing you are having some MP3 and WAV files which you find very soft (lacking in loudness). Below are the quickest steps you can implement loudness without ruining the original audio:
You can read this tutorial on installing Reaper in Windows. You need to install that first to your computer.
Step2.) Altering the volume of an existing audio file (whether it is an mp3 or a wav file) is a dest¬ructive form of editing. You need to make sure that you have done a backup of these audio files before editing.
Step3.) You can check this procedure on how to normalize audio using Audacity software.
Or if you are using Reaper, you refer to this quick tip on normalizing audio using REAPER.
Step4.)When maximizing volume (through amplification/normalization), allow some small headroom such as -0.2dB and not 0dB (maximum possible digital audio volume).
Maximizing audio in mastering (Limiting vs. Normalization)
The mastering process involves the following important processes :
a. Track Trimming and Noise Reduction