How to Compress MP3/ WAV/AIFF/FLAC to Small Size

By Emily Watson, Monday, November 6, 2017

To reduce audio file size, you need to compress the audio files. Whether you want to compress MP3/WAV/FLAC/AIFF to save space on your Android, iPhone or make it easier to stream the file online,  you can use a audio compressor to make the MP3/WAV/FLAC/AIFF smaller. Learn about the factors that influence audio file size and find out how to compress audio files without losing quality.

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Three Ways to Compress Audio Files

There are many factors that influence the size of a audio file. By changing these factors, we have different ways to reduce MP3/WAV/FLAC file size. 

Formats/Codec

Audio formats, or codec, such as MP3, WMA, is the wsy how an audio file is compressed, which is a key factor to decide the size of an audio file. There are mainly 2 types of audio codec:

  • Lossy audio: make the smallest audio files but the quality of sound might be affected. Popular lossy codecs include MP3, WMA, AAC, Ogg Vorbis.

  • Lossless audio: provide high quality of sound but the size is larger, such as FLAC, ALAC.

Therefore, converting audio files to another formats can reduce the file size.

Bitrate & sample rate

Bitrate and sample rate also influence the audio file size. Bitrate is the amount of data processed in a certain period of time while sample rate refers to the number of samples of audios carried every second. Higher bitrate and sample rate results in a bigger size. So you can make MP3/WAV/FLAC/AIFF files smaller by decreasing bitrate and sample rate.

Length

You can also trim a sound clip to make it smaller.

How to Compress MP3/ WAV/AIFF/FLAC Files to Smaller Size

FonePaw Video Converter Ultimate is an audio compressor and audio converter for you to compress audio files in 3 ways:

  • Convert MP3, WAV, AIFF, FLAC, M4A, OGG, AAC, etc. to other formats and make the audio file smaller. 

  • Allow you to adjust bitrate, sample rate, channel of a audio file so that you can reduce file size while keeping audio quality as high as possible.

  • Edit audio file to cut off the unneeded part and reduct the file size.

This audio compressor works for MP3, WAV, AIFF, FLAC, M4A, OGG, AAC and more on Windows 10/8.1/8/7 or Mac. 

Download the audio reducer on your computer now. After launching it, follow the three steps to compress MP3, FLAC, WAV, etc.

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1. Load audio files

After open the program on your computer, click "Add File" button to add the audio files you want to compress, whether the files are in MP3, WAV, FLAC, OGG, WMA, M4A, AAC and other audio format.

Load Audio Files to Program

2. Compress audio
Method 1: Convert audio file to lossy formats

The simplest and most effective way to reduce the size of the audio file is to use lossy compression. You can compress Lossless audio formats such as WAV, AIFF or FLAC to lossy formats such as MP3 or OGG.

Click the drop-down button of "Profile". Then, select "MP3 - MPEG Layer-3 Audio (*.mp3)" as output audio format from "General Audio" category.

Select Formats on Profile

Note: This method does not apply to compress MP3 audio file. If you want to compress MP3 to smaller file size, you may refer to Step 2.


Method 2: Reduce Bitrate/sample rate

If you already have a music file in a lossy audio format and want to make it even smaller, you can use the FonePaw audio compressor to reduce the bitrate and sample rate of the audio file. 

Click "Settings" button and go to the "Audio Settings" section. Then, change Audio "Sample Rate" and "Audio Bitrate" to a suitable file size. Choose any size as you want. For example, you can change the bitrate from 192 kbps to 128 kbps.

Change Audio Bitrate on Program

Note: Though this method suits to compress all audio files, the sound quality will be reduced proportionately.


Method 3: Trim MP3/WAV/FLAC/AIFF Clip 

Instead of compressing the whole file and risking losing its quality, you can trim the audio file to make it smaller.

Click "Clip" on the top toolbar. Then, drag the left and right triangles under the progress bar where you want to trim, and then the time will be shown in the Start Time box and End Time box for your reference. Click "OK" to save the settings if you have completed audio cutting.

Clip Audio Files

3. Finish the compression

Click the big "Convert" button of the program to start and finish compressing MP3, WAV, etc.

If you want to compress videos, FonePaw Video Converter Ultimate can also help you.

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