Hardware echo cancellation does not work on many devices · Issue #7635 · signalapp/Signal-Android · GitHub
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Allen & Heath AH-M-AHM-32-AEC-A Acoustic Echo Cancellation (AEC) module for AHM-32,12 channels of AEC, 150ms FIR Adaptive Filter, Far-end AGC, Residual echo NLP | Full Compass Systems
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