Analog audio circuits

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This is a companion page for the article Passive guaranteed simulation of analog audio circuits: A port-Hamiltonian approach submitted in may 2016 to the special issue Audio Signal Processing of journal Applied Science.

Comparison of numerical methods

A detailed comparison with simulation code are available here.

Diode clipper

/images/analogcircuits/Diode_clipper_schematic.png
/images/analogcircuits/Diode_clipper_signal.png

BJT audio amplifer

/images/analogcircuits/BJT_amp_schematic.png
/images/analogcircuits/BJT_amp_signal.png
/images/analogcircuits/bjt_PHS.png
/images/analogcircuits/bjt_LTspice.png

CryBaby wah pedal

Original

Short guitar sample

CryBaby output

The wah parameter (potentiometer coefficient) is continuously varying according to a sinusoid signal with DC offset 0.5, amplitude 1 and frequency 1Hz.