About the final accuracy of an FFT applied to note recording sample files, it's like if you have a number of waves in you FFT interval, they seldom will wrap around at sample boundaries, and certainly if you want an accurate match in your FFT, the FFT interval should as closely as possible match the wavelength of the lowest frequency in you tone.
So you'd have to find out the number of samples per wave, and use a multiple number of waves from your sampled file until the number of waves (in terms of as accurate as possible matched sampled in floating point) becomes close to an integer number. Then adjust the bin size, and hope transients (there's all kinds of electronic coupling going on) and disturbances (which do not necessarily fit in the same harmonic analysis interval for repeating waves) aren't too much a problem. T.V. _______________________________________________ dupswapdrop: music-dsp mailing list email@example.com https://lists.columbia.edu/mailman/listinfo/music-dsp