Hi! I think I should write some notes about how circuit modeling works in Kirchhoff-EQ. There are two methods for circuit modeling. The key is how to treat the non-linear distortion of the circuit. If we consider nonlinear things in the circuit, some kind of numerical integration should be used(as many many simulations did). Numerical integration […]

### Psychoacoustic Adaptive Filter Topologies

Some notes of Psychoacoustic Adaptive Filter Topologies About 15 years ago, I made a simple eq in matlab when I was studying on DSP. Compared with some famed commercial products, I was surprised that their sounds are much, much better than mine. After more study and research, I believe there’s no magic in their algorithms, […]

### Harmonic Shifted Envelope

Some notes of Harmonic Shifted Envelope When we say “compressor” or other types of dynamic processing, what do we actually mean? We means amp modulation. Yes, all dynamic processings use a curve to modulate audio volume, which is indeed amp modulation. For amp modulation, when a envelope of frequency A to modulate the signal of […]