Download link:
MP3 Splitter and Joiner Pro is able to merge and split audio files of extreme large size over 4GB. With 'Batch Split' feature, you can split multiple audio files easily by just a simple click.
Supports MP3, MPA, WAV, WMA/ASF, OGG, AIFF audio formats in MP3 Joiner Pro and MP3, MPA, WAV audio formats in MP3 Splitter (MP3 Cutter) Pro.