The Studiomaster AC-II-48 is a 4 input 8 output digital audio processor with a 48kHz sampling rate, 40-bit DSP processor and 24-bit AD/DA convertor. Every input and output can do matrix assign freely, with adjustable compressormiter threshold, soft knee, ratio, attached time and release time. Noise gate's threshold, hold time, attached time and, release time can be adjusted too. The AC-II-48 also includes online remote control, and 255 units linkable through Rs485.