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The plm-8 m 8 belle matrix 8-channel DSP matrix mixer is designed for maximum flexibility and reliability. It is the heart and soul of the belle digital audio matrix system. When used in conjunction with the plm-8cs call station, plm-wpc wall mounted control panel and plm-4px2x amplifier, it is suitable for almost all applications requiring up to eight areas of high-quality voice and background music (BGM). Its sound performance is suitable for field performance, background music, high-quality voice environment and regional broadcasting. Some typical applications include: shopping centres, schools, restaurants, bars, nightclubs, cafes, a gym, recreation facilities, church, warehouse, office building, airport, railway station, bus station, the board of directors meeting rooms, meeting rooms, conference facilities, small theme parks, museums, indoor after performing arts center Taiwan and the gym. Basic function controller and the light The indicator lights on the front panel including the power indicator light, signal illusion/clipping indicator lights, audio calling station bus indicators, the output signal indicator lights, RS485 and Ethernet. There is no controller on the front or back panel of the device. In this way, the setup parameters of the system can be prevented from being changed at will. The main power switch is located on the back of the device. Graphical user interface (GUI) through the graphical user interface of computer and iOS applications, end users can choose their own enough background music source and other areas without affecting system under the condition of mixed any mic/line input. Windows GUI also provides an intuitive installation package with powerful DSP capabilities to make installation easier. IOS applications and computer guis can customize different access limits for users at different levels. DSP functions can be accessed through computer GUI software or iPad applications. Input: ? input gain: ?16dB pad, +48V phantom power supply, 100Hz HPF. ? input dynamic range compressors: thresholds, ratios, triggers, releases, and gains. ? input parameter equalizer: bell filter, tilt filter, or trap filter can be selected for each frequency band. ? frequency divider provides: High Pass and Low Pass filtering for 8 segments. ? output parameter equalizer: bell filter, tilt filter, trap filter or all pass filter can be selected for all 7 frequency bands. ? output delay, each output can be delayed by 120 milliseconds. ? output dynamic range compressors: threshold, ratio, trigger, release time, and gain per channel. ? output level can limit the maximum output level in the region. ? regional and global system silence. Global function ? zone mixer: allows each zone to select music source input and mix 4 microphone/line inputs for each zone. The zone mixer can be used as an iPad or iPhone application. ? advanced administrator password protection function on PC GUI. This prevents system setup parameters from being changed at will. ? output allocation: allows an output to be set to simulate input from other areas, which is especially useful when a room is assembled or when an active two-way speaker system or a bass speaker is used. · drag and drop Settings on one processing block into another area to easily replicate equalizers, compression, delays, etc.