random dsp code

it's a bunch of half-baked python code that's kinda handy.

don't expect commits, docs, or comments to be any verbose.

the stuff

• a basic BS.1770-3 normalization implementation — bs.py

• biquad butterworth/chebyshev filters (via DSPFilters) — butterworth.py

• bilinear transformation: s-plane to z-plane — planes.py

• various functions for biquad filters — bq.py __init__.py

• some functions for state-variable filters (via Raph Levien) — svf.py

• sine sweeps, and the Optimized Aoshima's Time-Stretched Pulse (via here) — sweeps.py

• a lot of stuff for magnitude plotting like tilting and smoothing — fft.py smoothfft.py __init__.py

• rough experiments with psychoacoustic equalization ("neon pink" and other crap) — data.py __init__.py

• miscellaneous matplotlib stuff — plot.py

• miscellaneous utility functions — util.py wav.py

all wrapped up in a inconveniently generic "lib" module!

dependencies

python 3.4+

numpy scipy sympy matplotlib ewave

usually run in an ipython environment.