audio hijack

Freeware to convert MP4 audio data to MP3 audio file

Freeware to convert AAC audio to MP3 audio

Convert audio files between mp3, wave, wma, ogg, vox audio formats.

Beeper is an auxiliary audio processing AU and VST plugin.

Free Stereo-widening effect plugin that can be used to add stereo width to audio tracks

Basslane is a free audio effect for controlling the stereo width of low frequencies on tracks and mixes

Free rotate, clip, crop, watermark convert video and audio files.

It can help users play 4K/HD video or DTS-HD and Dolby TrueHD audio on computer.

a complete RTSP server application. It can stream audio and video files

Convert apple music(.m4p files) to drm-free audio formats.