User manual PRESONUS ACP-22 DATASHEET

[. . . ] Each channel on the ACP88 provides crystal clear, musical compression and is equipped with full-featured controls including variable attack and release and switchable soft/hard knee. Also, an "Auto" mode on every channel takes the guesswork out of setting the compressor. The noise gates are excellent for cleaning up drums, vocals, and instruments. [. . . ] The noise gates are excellent for cleaning up drums, vocals, and instruments. Gate feature set includes; threshold, variable attack & release times and gate range controls. The Gate boasts a Gate Key/Sidechain for precise frequency gating applications. In addition, each channel has a seven-segment LED meter that displays gain reduction, and an LED indicator for gate position (open/close) and compression threshold (above/below). A unique linking function makes it possible for any channel to be linked to the previous. This comprehensive bus can link two to eight channels together in any order as well as create various link groups. De-essing, ducking and other forms of spectral processing can be accomplished using the compressor Sidechain provided on every channel. At the heart of the ACP88 is the much respected THAT 4301s VCA. The noise gate shall have a threshold of - infinity to no less than +20dBu. The gate attack time shall be variable from 10 microseconds to no more than 100 milliseconds. The gate release time shall be variable from . 02 to no more than 2 seconds. The gate range shall be preset for either -60dB or -20dB reduction. All input, output and sidechain signals shall be via the rear panel. The stereo link shall be of the true RMS summing type with the previous unlinked channel as the master when linked. The unit shall have the following front panel switches for each channel: Soft/Hard knee, auto, link, range and bypass. Each channel shall have the following identical controls: Compressor threshold, compressor ratio, compressor attack, compressor release, gate threshold, gate attack, gate release, and channel gain make up; and the following identical metering and indicator LEDs for each channel: Below/Above compressor threshold, compression gain reduction, gate open/close, and link engaged/disengaged. [. . . ] The unit shall have the following front panel switches for each channel: Soft/Hard knee, auto, link, range and bypass. Each channel shall have the following identical controls: Compressor threshold, compressor ratio, compressor attack, compressor release, gate threshold, gate attack, gate release, and channel gain make up; and the following identical metering and indicator LEDs for each channel: Below/Above compressor threshold, compression gain reduction, gate open/close, and link engaged/disengaged. There shall be a rear panel switch for each channel to select nominal input and output operation levels at 10dBV or +4dBu. [. . . ]