The API 2500 is a versatile dynamics processor that lets you shape the punch and tone of mixes with absolute accuracy. Its dual channel design lets the 2500 also function as two separate mono channels via a single compression setting. Using auto-makeup gain, you can adjust Threshold or Ratio while automatically maintaining a constant output level. With both "feed back" and "feed forward" compression types, the API 2500 boasts a wide range of incredibly musical parameters which have made it a favorite of engineers the world over. Features Switchable 3-position Thrust high-pass filterVariable Link left and right channels3 Variable Link filter types3 Compression modes: Soft, Medium and Hard Knee6 Release settings: 5 fixed, 1 continuousUp to 24bit, 192kHz resolution (TDM 24/96 only)Mono and Stereo componentsSupports TDM, RTAS, Audio Suite, VST, AUPC and Mac compatible Registration InformationSerial Number: https://www.waves.com/downloads/central