Developers Notebook-Digital Signal Processing
Digital Signal Processing
- The best intro to dsp
- Understandable with only knowledge of basic math
Fast Fourier Tranform (FFT)
GPL - http://www.fftw.org
- These guys are really full of themselves and their testing is skewed (I.E. BS), but it is one of the fastest and best.
Public Domain - http://netlib.org - check out fftpack
- RN - the best one I know of...
A listing of FFTs - http://ourworld.compuserve.com/homepages/steve_kifowit/fft.htm
Head Related Transfer Functions (HRTF & HRIR)
Sample Rate Conversion
Throw out samples then lowpass filter above nyquist frequency...
- Time Scaling == Pitch Scaling + Resampling.
- Pitch Scaling == Time Scaling + Resampling.
- Final Report for Project Group Blue
Change of sound over time....
- sample to sample?