We have found one software suitable in our database for this conversion.
WavePad audio editing software uses .wpp files to store work in progress, so wpp to m4a conversion pretty much describes export of WavePad projects to M4A format. These projects do contain audio data (even from multiple audio files), but can only be opened in the original software.
Updated: February 6, 2023
WPP
A wpp file extension is related to the WavePad, an audio editing program form NCH. A wpp file stores audio data.
M4A
FIles with m4a extension are audio files stored in MPEG-4 (MP4) container and use AAC (Advanced Audio Coding), or Apple Lossless (ALAC) audio compression. M4A is very popular on Mac computers, because it is default audio format used by iTunes. M4A is also default audio format for Apple portable devices (iPod, iPhone, iPad).