The 'st-modular-envelope' is an envelope generator Eurorack module that stands out for its wide range of features and advanced control functions. Designed by ST Modular, this ADSR/AR envelope generator includes four slider potentiometers to adjust the length of each ADSR stage, ranging from 1ms in fast mode to half a minute in slow mode. The fast mode allows for fine adjustment of short envelopes, making it ideal for creating percussive sounds.
The module also features dedicated SHAPE potentiometers for the ATTACK, DECAY, and RELEASE stages, allowing users to switch between exponential and logarithmic response curves. Each phase has its own CV input to control its timing, with dedicated attenuators to adjust the amount of voltage applied. The slider LEDs indicate if a voltage is being processed and if the timing of a stage is being changed.
In addition, the 'st-modular-envelope' includes internal modulation, loop function, and an internal envelope-controlled amplifier. The TRIG/GATE switch determines whether a trigger or gate signal should be applied to the TRIG/GATE input. When set to TRIG, the envelope type changes to ATTACK and RELEASE only, while GATE mode activates a full-featured ADSR envelope with many adjustment options.
The module also features an inverted output ENV INV, with voltage ranges of about 0V to +10V for the normal output and 0V to -10V for the inverted output. It also includes an internal VCA that is connected to the envelope output.
With so many features, the 'st-modular-envelope' is a highly versatile module that allows users to create a wide range of envelopes with many fine adjustment options, making it perfect for generating dynamic control voltages to create organic and interesting sounds.
Example Usage
If you’re just starting to use the 'st-modular-envelope' Eurorack module, begin by patching in a gate or trigger signal to the TRIG/GATE input and then connect the output to a VCA. Adjust the slider potentiometers to shape the envelope to your liking - try adjusting the SHAPE potentiometers to switch between exponential and logarithmic response curves for different stages of the envelope. You can also experiment with the internal MODULATION source by turning the MOD RATE potentiometer to vary the rate of a triangle or square-wave LFO applied to any stage of the envelope. Finally, use the attenuators to adjust how much CV is applied to control the timing of each stage, and listen to how the changes affect the sound coming from the VCA output. With practice, you'll start to develop a feel for the many advanced features of this versatile module and develop your own unique sounds.
An intermediate-level usage example for the st-modular-envelope Eurorack module is using the dedicated SHAPE potentiometers to switch between exponential and logarithmic response curves for the ATTACK, DECAY, and RELEASE stages of the ADSR envelope. By manipulating these response curves, you can achieve more complex and nuanced sounds in your music, allowing for greater expressiveness and creativity. For example, you can create a sharp and precise attack followed by a slow and gentle decay, or a quick release that decays logarithmically for an interesting and unpredictable effect. By experimenting with the SHAPE controls on the st-modular-envelope, you can explore the dynamic features of the module and unlock its full potential.
Further Thoughts
An expert-level usage example of the st-modular-envelope Eurorack module is utilizing the SHAPE potentiometers for the DECAY stage to create evolving and complex sounds in a patch. By switching from exponential to logarithmic response curves, you can add an interesting texture to your music production. Additionally, by patching a CV signal into the DECAY input and adjusting the attenuator, you can add a level of unpredictability to your sounds that can be controlled with ease. This feature makes the envelope generator an excellent tool for creating experimental and avant-garde electronic music.