FILTRONE

Low Pass Filter With A Big Switch.

The MRG FILTRONE is a 6/12/18/24 dB Voltage Controlled Low Pass Filter with resonance up to self-oscillation.

Apart from the usual controls for manual and CV-controlled cutoff and resonance, offers two special features: SLOPE switch and TONE control.

SLOPE Switch
The big rocker switch under the cutoff allows the filter to change its slope from 18dB to 24dB.

TONE Control:
This is a defining feature of the module.

In 24dB mode, the tone control blends the output of the second stage (12dB slope) and the output of the fourth stage (24dB slope).

In 18dB mode, the tone control blends the output of the first stage (6dB slope) with the output of the third stage (18dB slope).

Practically speaking, this allows to maintain the cutoff stable, but gently increasing harmonics.

A simple demo:

https://mrgsynth.it/filtrone