'''[https://en.wikipedia.org/wiki/Signal_processing%|%signal processing]''' deals with the processing of analog and digitized signals ** Tutorials ** [Tcl based signal processing fundamentals: Frequency Modulation]: [Tcl based signal processing fundamentals: Practical Fourier Analysis]: [Tcl based signal processing fundamentals: Additive Wave Synthesis]: ** Tools ** [GTKWave]: a waveform viewer [Oscilloscope]: ** See Also ** [Sampled Signal Reconstruction in Tcl driven Maxima]: [wavelet]: <> signal processing