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MULTI-PURPOSE SOUND SYSTEM Section 16780 15-1207 A.L.S. transmitter shall be terminated to the output of this DSP system processor. The processor has been selected to provide remote volume control management, source mixing, delay, and equalization and speaker protection. The DSP shall be required to provide a minimum of six inputs with six outputs. The following function shall be required to meet the DSP specification: 1. independent channel input routing or mixing is required to properly mix the speech input and music input from the mixer. 2. The individual inputs shall require multiple parametric EQ functions for each channel. a. The Speech input shall require a speech intelligibility curve that shall boost the frequencies at 500Hz, 1 KHz, 2KHz and 4KHz. This curve shall be minimal with 1.5 dB @ 500 Hz & 4KHz, and 2.0 dB @ 1 KHz and 2KHz. b. The Music input shall require a music balance curve that shall boost the lower frequencies at 90Hz — 250Hz +3dB and 5KHz —12KHz +3dB c. The microphone mixer outputs are required to include feedback suppression. 3. Compression — Variations in microphone volumes will occur when the users overload the microphone by shouting in close proximity to the microphone element. This high volume signal will overload the typical mic input. A properly adjusted compressor will reduce the dynamics received from the input and protect the amplifier from the overloaded signal. 4. Limiting — The limiter is additional insurance for signal overload. This circuit may be used to protect the amplifier should a microphone be dropped. The loud damaging pop normally heard in this instance would be limited to avoid overload to the amplifier and speakers. 5. Speaker Processor — The DSP must provide the option to configure the outputs with the use of delay to properly align the spectators' speakers with the court speaker array. The court speakers shall be set at zero delay + latency and the cross court bleacher speakers shall be corrected with the delay set as required to eliminate cross court echo. Time delay spectrometry measurements with an audio analyzer shall determine the actual delay for a relative temperature and humidity B. Proper system programming shall be the responsibility of the Audio -Visual contractor to maximize the tonal balance and microphone gain before feedback. C. The DSP electronic specifications shall meet or exceed the following: a. Frequency Response 10-20 kHz @ ± 1.0 dB b. THD + Noise < 0.005% @ +4 dBu/1 KHz c. Dynamic Range > 105 dB d. Latency Delay < 6.50 ms (Design Dependent) e. Input Sensitivity < 24 dBu f. Crosstalk > 100 dB @ 1 KHz g. Sampling Rate 48 kHz — 24 bit 2.4 AUDIO — INPUT/OUTPUT (Wireless Microphones & A.L.S. Components) 1. Wall plate terminations shall include: A 3.5mm stereo music input and microphone XLR- F input at the location indicated on the plans. The connectors on each wall plate shall be terminated to an independent input on the DSP (Digital Signal Processor), providing 13