Quote from TunePocket Support on June 30, 2021, 10:27 pm

If you ever tried adding on hold music to your phone system, you know that most systems will only accept small files, typically under 4 Mb.

Depending on the format (WAV or MP3) and the bit rate of the audio file that puts hard limit on the length of the audio you can use. For a CD quality WAV file that will only give you about 20 sec. of audio. Not good!

The solution is to reduce the size of a regular WAV and MP3 audio file. In this post I will show you how to make an audio file smaller and how to convert it into the proper format before adding it to your phone system.

Here's out detailed step by step tutorial how to reduce a WAV file size and to make it compatible with virtually any phone system:

https://www.tunepocket.com/music-on-hold-smaller-file/