DoepferA-121d Dual Multimode Filter (Standard Edition)

Doepfer A-121d

Doepfer's A-121d Dual Multimode Filter is a series or parallel two-channel filter with shared controls and two different flavors. A global Frequency control sets both filters' cutoff and a secondary Delta control changes the frequency spread between the two with noon being unified. Both filters feature a Band pass filter while VCF1 has a high pass and VCF2 has a low pass; all four filter options can be patched out individually. Each filter has a dedicated Q or resonance controls, each filter's individual frequency can be addressed via CV and both have a corresponding attenuation control, and each input has a gain control. Inputs are normalized so that you can utilize a single audio source to get several filtered output options and a simple two channel mixer allows for creative self-patching. Achieve flexible filtering options such as: dual band pass, variable band pass, notch filter, low pass and band pass, high pass and band pass and stereo options for all. Doepfer's A-121d Multimode Filter is a fantastic and compact addition to any modular system looking to add refined frequency shaping.

A-121d Features

• Dual-channel multimode filter
• Series or parallel functionality
• VCF1 is a band pass and high pass filter
• VCF2 is a band pass and low pass filter
• Shared global Frequency control with Delta frequency spread
• Individual CV Frequency controls for each filter
• Input 1 and 2 gain controls
• Q Controls for each filter
• Mix external audio or self-patch with the Mx1 and Mx2 inputs
• MxO are both band pass filters together by default, broken by patching from the B2 output
• Independent high pass and low pass outputs