The Waves API 2500 plug-in 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 Waves API 2500 compressor plug-in boasts a wide range of incredibly musical parameters which have made it a favorite of engineers the world over. Compressor Controls Threshold: -20dBu to +10dBu Attack: 0.03ms, 0.10ms, 0.30ms, 1 ms, 3 ms, 10 ms and 30 ms Ratio: 5:1, 2:1, 3:1, 4:1, 6:1, 10:1 and Infinity:1 Release: 0.05s, 0.1s, 0.2s, 0.5s, 1.0s, 2.0s and Variable Release mode Variable Release: 50ms to 3s Tone Controls Threshold: Knee Hard, Medium and Soft Detector: Thrust Loud, Medium and Normal Tone Type: New (Feed-Forward) or Old (Feed-Backward) Link Controls Filter Type HP, LP and BP L/R Link Independent, 50%, 60%, 70%, 80%, 90% and 100% VU Meters Input/Output -30dB to 0dB With Clip indicator Gain Reduction 0dB to 30dB Meter Source GR, IN or OUT Output Controls Analog On/Off Compressor In On/Off Bypass On/Off Make-Up Gain Auto/Manual Make-Up Gain -24dB to +24dB Read more: http://www.waves.com/content.aspx?id=3612#ixzz1cgD6Bzmc