Add frequency-domain coherence estimation with resolution mapping#11

Draft

Copilot wants to merge 12 commits intofeature-freq-domain-shiftsfrom

copilot/implement-frequency-domain-coherence

Commits on Feb 18, 2026

Initial plan
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Add frequency-domain coherence implementation with interpolation modes

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Fix test cases and validate all tests passing

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Fix coherence manager warning check for zero modulation frequency

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Ensure 0 at first position and add high-res STFT configuration

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Fix alpha ordering in frequency-domain coherence methods

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Fix tests after alpha ordering change

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Update test configuration for frequency-domain coherence with new parameters and adjustments
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Fix max_bin calculation for different transform methods and add comparison test

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Remove unused max_bin calculation for harmonic frequencies in f0_manager.py
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Fix alpha=0 selection when multiple values have identical coherence

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Fix frequency bin resolution mismatch between coherence and beamforming

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