Mac OS X Softwares to Waveform Seekbar

Mp3splt is an open-source command-line utility and graphical interface tool for splitting MP3, Ogg Vorbis, and FLAC audio files without decompressing or recompressing them. It's designed for fast and accurate splitting based on timed intervals, silence detection, or cue sheets.

Aegisub is a powerful and free open-source cross-platform subtitle editor, widely adopted by fansubbing communities and professionals for creating, translating, and styling subtitles for visual media.