HMADSR1c

The HMADSR1c is a voltage controlled four stage transient generator (envelope generator). The device can be configured to provide attack-decay-sustain-release (ADSR), AR or AD envelopes. The time constants for the attack, decay and release stages can be adjusted from a few milliseconds to several minutes.

The circuit offers a significant improvement over conventional OTA based designs in terms of offset voltage (typically <2mV) and control voltage feedthrough.

Features

• • Voltage controlled attack, decay and release times. Exponential control law.

  • Voltage controlled sustain level. Linear control law.

  • True RC exponential decay and release.

  • Linear OR exponential attack phase.

  • Very low voltage offset (1.5mV typ.)

  • Very low control voltage feed-through.

  • +/-12V to +/-15V supplies.

  • Low external parts count.

Demo

This demo was created by Matt J using a module built around the HMADSR1c at its core.