Phase 1- Audio Manipulation App Development

I need an audio manipulation application primarily for music production. The app must support WAV file format and include the following key features:

- Gapless looping
- Pitch shifting
- Time stretching

Ideal skills and experience:
- Proficiency in audio processing
- Experience developing audio applications
- Strong knowledge of WAV format and related manipulations
- UI/UX design for user-friendly interfaces