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Stempel:

vocoder plugin stempel

High Quality VST Vocoder:

Stempel by AZ Audio is a free vocoder VST effect for Windows. The Stempel vocoder operates in the frequency domain making use of Fast Fourier Transformation, applying the classic vocoder sound to the audio signal, but with a much smoother sound and a higher analysis definition than with typical time domain vocoder effects using band pass filters and signal followers. The Stempel plugin comes with a very comprehensive manual and 13 presets.