Joel de Guzman is very generous to share this intriguing Bitstream Autocorrelation concept and also an implementation in C++. That implementation is for platforms like microcontroller and DSP chip where IO samples are integers. Not sure if the bitstream approach will compare so favorably against FFT based autocorrelation within a float oriented framework like Pd on general purpose architectures.

On 12/13/19, Simon Iten itensimon@gmail.com wrote:

hi all and katja :-)

have you seen this:

https://www.cycfi.com/2018/04/fast-and-efficient-pitch-detection-bliss/ https://www.cycfi.com/2018/04/fast-and-efficient-pitch-detection-bliss/

seems like a very good canditate for a fast and accurate pitch detector in a pd external, no?