filterdrve (stereo)

The filterdrve is an adaptation of the famous Korg MS-20 analog filter for the api 500 format. I was always looking for an easy way to implement the great sounding MS-20 filter in a recording and mixing setup, and this came out. This version has singular controls for two (stereo) channels.

The filterdrve has everything you want in a 500 series filter, such as balanced i/o, low noise, great headroom etc. Some features are added like overdrive, audio feedback into the filter and a controllable gain structure.

The real killer is that this filter, coupled with the drive and resonance, really screams. Hence the name: filterdrve.

“This filter sounds wild!” – Jon Gilmore (producer and mixer The 1975, The Japanese House, Beabadoobee, Nothing But Thieves)

drive with low noise

Low noise NE5532 opamps are used for great noise performance, while retaining the squelching sounds of the original. Self-oscillation can be attained with the peak control at maximum.

The filter can be switched from low to highpass operation. The bypass switching is done with hardware relays, for full bypass transparency.

The filterdrve runs on a 16v bipolar power supply, which allows for a lot of headroom. The drive control reduces the headroom, for overdriven sounds. Noise is much lower than the original ms-20 filter.

This filter has singular control for stereo operation. Output controls are split to account for any minor tolerance differences between left and right. The filter has great stereo balance.

The stereo version also adds an envelope follower, which smchaoothes out the audio signal and can be used to modulate the cutoff frequency.

made to be played with

Great care has been taken to make sure the unit has the best sound, with as much control as possible. This unit is meant to be played with and fiddled around, so please do. All the knobs interact with each other due to the circuit design, so it is great fun getting to know every detail of how the unit reacts to different settings.

The filterdrve has alpha metal pots (knobs), an anodized black aluminium faceplate which is laser engraved, and good quality switches.

demos

For a demo of the sound please check out the videos below. If you need any more information you can always contact me at info@singularaudio.nl

pricing

These units are priced at 499 euros, excl. shipping. They are assembled by hand in small batches.

files

Manual

Panel design for recall sheets