The Synthrotek OBEY is an interface module for modular synthesizers in Eurorack format. The first part of the module is used to integrate external audio signals into modular systems. It contains the components preamplifier, envelope follower and a comparator. The second part is an Attenuverter & Offset generator with which CVs and audio signals can be reversed, mirrored and attenuated. The envelope follower generates an envelope at its output following the signal path of the external audio signal. The comparator generates a gate signal corresponding to the height of an adjustable trigger threshold.