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<br />~ <br />~HILLS <br /> <br />MEMORANDUM <br /> <br />. <br /> <br />DATE: <br /> <br />June 8, 2004 <br /> <br />Agenda Item 6.C. <br /> <br />TO: Honorable Mayor and City Council <br /> <br />FROM: Murtuza Siddiqui, Finance Director/Treasurer "I'fI{ <br /> <br />SUBJECT: Audio Enhancements - Council Chambers <br /> <br />BACKGROUND: <br /> <br />When the City Hall was built, a system was installed to provide audio and video for Council <br />Chambers and cable channel 16. In order to improve the video and sound quality, a number of <br />adjustments were made to the system. Technicians from DS Productions were brought in to <br />make changes to the system. <br /> <br />. <br /> <br />The following is a summary of adjustments that were made to the system to enhance the sound: <br /> <br />I. Longer microphones were installed in an attempt to place the microphone pickup closer to <br />the speaker's voice. <br />2. Three Computerized Equalizers were installed, the Sabine GraphEQ units are designed to <br />optimize sound coming from the speakers in Council Chambers. They shape the audio <br />frequencies so that undesirable tones are eliminated, such as feedback. Council Chambers <br />also underwent an audio spectral analysis, and other adjustments were made to the <br />amplifiers. <br />3, A wireless microphone unit was added to the system. Initially, a handheld microphone was <br />purchased. A technician was hired to integrate the wireless microphone into the two <br />computers mentioned above, <br />4, A second wireless clip-on (also known as a lavalier) microphone was later installed. A clip- <br />on allows the presenter mobility during a meeting, The current microphone is an <br />inexpensive model, with fair audio quality. When there is a large group in the audience, it is <br />not always easy to hear the presenter when the clip-on is used. Efforts were made to <br />improve the clarity of the microphone by making adjustments to the computerized <br />equalizers and increasing the volume of the microphone being heard through the speakers <br />above the audience. <br />S, The AMX system, which controls the loudspeakers was originally programmed to adjust the . <br />volume of the speakers in council chambers. It was determined that the AMX system would <br />