MasterDeck Pro is a professional audio mastering suite built for musicians, producers, podcasters, and independent creators who want polished, release-ready audio without sending tracks to a cloud service. Load a song, shape the sound with real-time mastering controls, compare original vs mastered playback, then export finished masters in professional formats. MasterDeck Pro runs locally on your device, so your audio stays on your computer. Features include: Real-time mastering chain with EQ, compression, multiband compression, limiter, de-esser, transient shaping, tape saturation, harmonic exciter, stereo width, mid/side EQ, and stereo analysis Auto-Enhance for fast starting points Presets for common delivery styles, genres, speech, vinyl preparation, loud masters, and custom user presets Reference matching to help shape a track toward another audio file Original/Mastered A/B monitoring, blind testing, Delta Listen, codec preview, and gain-aware monitoring tools LUFS loudness metering, true-peak limiting, loudness history, spectrogram, phase meter, vectorscope, correlation meter, and gain-reduction meters Export to WAV, FLAC, AIFF, and MP3 formats with bit-depth, sample-rate, dither, and loudness-normalization options Batch processing, album-aware mastering, CSV/JSON manifests, and Watch Folder automation Project save/load, recent projects, version slots, A/B/C/D snapshots, project notes, reference library, and mastering report PDFs MasterDeck Pro is designed for local-first mastering workflows. Audio files are processed on your device and are not uploaded by the app.