Video Sound Refiner

Your favorite music video, a treasured home recording, or a beloved VHS tape from years ago. "The performance is perfect, but the sound quality is lacking." To all creators and video lovers who have felt this—VideoSoundRefiner is built for you.

[ Have you ever experienced these audio frustrations while watching video? ]
● "The bass disappears on my phone speakers."
Even the best bass line can't be heard on small transducers. VideoSoundRefiner uses psychoacoustic synthesis to make the low-end audible on any device.
● "Old music videos sound quiet and thin compared to modern releases."
Legacy recordings often lack the density of modern masters. Our look-ahead maximizer boosts loudness without sacrificing signal integrity.
● "The vocals sound muffled or under a blanket."
Traditional EQ often makes things harsh. Our harmonic exciter restores the lost air and high-end detail, making vocals clear and immediate.
● "Instruments are clumping together in the center."
When recordings lack separation, they sound small. Our spectral unmasking technology gives every instrument its own space.

[ Real-Time Preview, Powered by ExoPlayer ]
Unlike static filters, VideoSoundRefiner lets you hear every change instantly. Adjust any parameter while your video plays and hear the effect update in real time—no re-exporting needed.

[ The Science of Sound: Technical DSP Specifications ]
VideoSoundRefiner is a high-precision DSP utility that analyzes and optimizes the audio track of your video with objective accuracy.
● Harmonic Excitation & Spectral Shaping
High-pass filtering and polynomial soft-clipping synthesize high-frequency harmonics, restoring clarity without the phase distortion of traditional EQ.
● Psychoacoustic Bass Enhancement
Uses "Missing Fundamental" theory to generate sub-harmonics, letting low frequencies be perceived on small transducers without exceeding their mechanical limits.
● Look-ahead Peak Limiting (Maximizer)
A 5ms look-ahead limiter with adjustable input gain and ceiling, using an intelligent release curve to increase density while preventing digital clipping.
● Instrument Separation & Spectral Unmasking
WOLA synthesis and spectral contrast enhancement exaggerate panning differentials above 600Hz, reducing masking and improving instrument definition.
● Advanced Formant Detail Controls
Fine-tune formant shifting with Cepstral Envelope Fade, High-Frequency Protection, and Low-Energy Frame Bypass for precise, natural-sounding pitch and voice transformation.
● Precision Manual Control
Every DSP module is adjustable via precision sliders: Drive/Mix for Harmonic Exciters, Input Gain/Ceiling for Limiters, Pitch and Formant shift ratios, and spectral separation intensity.

[ Perfect For ]
・Music Video Enthusiasts: Enhance your favorite MVs for a richer listening experience.
・VHS & Legacy Restoration: Dramatically improve the sound of degraded, tape-era music videos.
・Mobile Playback Optimization: Automatically balance frequency range for clear sound on phone speakers.
・Content Creation: Polish voiceovers and dialogue for consistent loudness and clarity.

[ Core Features ]
・Harmonic Exciter (High-frequency synthesis)
・Sub-Bass Restoration & Virtual Bass (Psychoacoustic processing)
・Drive & Saturation (Non-linear signal enrichment)
・Spectral Noise Removal (FFT-based subtraction)
・Stereo Imaging Expansion (Correlation-based widening)
・Pitch-Shift & Formant Shift (Granular/Phase-vocoder algorithms)
・Real-Time Playback Preview (Powered by ExoPlayer)
・AI-Based Parameter Recommendation (Waveform-driven analysis)

VideoSoundRefiner provides a transparent, controllable environment for video audio engineering on the go—delivering studio-standard DSP for your video's sound, right on your phone.

[ Open Source Licenses ]
- AndroidX Media3 (including ExoPlayer)
Licensed under the Apache License, Version 2.0 (the "License").
You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0