dåpf

Analog dual all-pass filter

Introducing dåpf, the first dedicated effects processor in the Instruō
product line. The Instruō dåpf is a set of two analogue all-pass filters.

You might be asking yourself, “What is the point of a filter that passes
everything?” All-pass filters don’t actually attenuate frequency
amplitudes directly, but rather alter the phase relationship of frequencies
across the spectrum. All-pass filter stages appear in the vast majority of
voltage-controlled filter topologies as well as serving as a core building
block within DSP.

The normalled I/O of dåpf allows for cascaded or independent use of
the two all-pass filter circuits, offering everything from classic phaseshifting to psychoacoustic stereo enhancement and synthetic
Doppler effect.

• Two parallel all-pass filters
• Independent attenuverters for voltage control
• 1-Pole/2-Pole configuration for channel 1
• Cascaded normalisation
• Global 1 volt per octave tracking

https://www.instruomodular.com/product/dapf/