METHOD AND APPARATUS FOR CHANGING THE TIMBRE AND/OR PITCH OF AUDIO SIGNALS

European Patent Office Patent

PATENT NO 0750776
APP PUB NO EP-0750776-A1
SERIAL NO

96900481

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A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.

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