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Real-Time Voice Modulator Implementation for Music Synthesis

Explore the design and implementation of a voice modulator system that modulates voice to match chord frequencies while preserving overtones. Input includes voice audio from a microphone and keyboard chords. Outputs voice at specified pitch(es) to create music synthesis. Implementation involves analyzing FFT on 256-frame periods, using block RAMs for audio caches, and downsampling for real-time playback.

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Real-Time Voice Modulator Implementation for Music Synthesis

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  1. A Voice Modulator Adam Rosenfield Lunduo Ye 6.111 Spring 2007

  2. Features • Inputs • Voice audio from microphone • Keyboard chords • Modulate voice to match chord frequencies, preserving overtones • Outputs • Voice at specified pitch(es)

  3. Block Diagram

  4. AC97 Interface

  5. VGA Interface

  6. Implementation Details • Analyze FFT on 256-frame period • Block RAMs for audio caches • Downsample as necessary to allow “realtime” playback

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