LADDER Manual

Software version: 1.0

Credits

Concept & Design: Andreas Steinholtz & Nis Wegmann

Graphics: Andreas Steinholtz

Programming & DSP: Nis Wegmann & Christian Lundgaard

Introduction

Ladder is an analogue-modelled multimode filter. Based on the characteristic ladder filter design used in the iconic Minimoog synthesizer, Ladder brings the smooth, organic sound of the original unit to the Reason Rack. Ladder uses cutting-edge DSP rooted in techniques used in industrial circuit simulators to accurately model its analogue components. Furthermore it extends the original filter with a mixer with simultaneous low-pass, band-pass, and high-pass sources and a unique stereo-spacing effect, resulting in an extremely versatile unit capable of all kinds of effects from gently distortion and deep synth bases to complete analogue mayhem.

Front Panel

1: Filter Section

FM

FM controls the amount of cutoff modulation from the FM audio input on the back.

CUTOFF

Filter cutoff ranging from 20 hz to 20.000 hz

EMPHASIS

Filter resonance. When emphasis value gets high enough the filter will go into self-oscillation and produce a sine wave.

2: Mixer Section

Here you can mix the output of the different filter modes together.

3: Amp Section

INPUT

Controls the level going into the filter. Higher levels results in the filter being saturated.

OUTPUT

Controls the output level of the filter. When the AUTO switch is on the level is controlled automatically.

O/L lamp

Overload lamp indicates when the filter is saturating the signal.

LOAD

This adds 20dB of gain to the input for extra saturation.

AUTO

The output level is controlled automatically.

SPACING

Spacing shifts the cutoff points of the left and right channel away from each other. The higher the value the further apart the cutoff points we be.

Back Panel

Audio Inputs

AUDIO IN

Stereo audio inputs.

AUDIO OUT

Stereo audio outputs

FM

FM input is an audio input used for modulating the cutoff frequency at audio rates. The amount of modulation is controlled by the FM knob on the front panel.

CV Inputs

CUTOFF

Modulates the cutoff frequency.

EMPHASIS

Modulates the emphasis amount.

KEY TRACK

Key Track (keyboard tracking) is used for making the cutoff frequency follow (track) the keys played on your keyboard when a Note CV signal is connected. When the Key. Track amount knob is set to maximum the filter with track the note signal 100%.

FM

Modulates the amount of FM modulation.

SPACING

Modulates the amount of spacing.