User manual BIAMP MSP22E

[. . . ] MSP22e Dual-Channel Multi-Function DSP System Processor Operation Manual Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. an affiliate of Rauland-Borg Corp. (503) 641-7287 www. biamp. com blank print update September 7, 2005 Q: What is this 'Leveler' inside the MSP11 & MSP22e? The Leveler function, in the Gain Manager section of an MSP11 or MSP22e, is an automatic gain control (AGC). This means that the Leveler automatically adjusts volume levels up or down to compensate for signals that are softer or louder than normal. Q: What can this 'Leveler' do for me and my customer? The two most common applications for the Leveler are to control music sources which have been recorded at different levels, and to control different levels of speech caused by the person(s) speaking and/or their varying distances from the microphones. Example #1: A background music system utilizing a CD player as the primary source. [. . . ] From the factory, Channels 1 & 2 are set for Linked Frequency, which allows adjustments made in either the upper graph or lower graph to affect both filters. Clicking on Linked Frequency will disable this function, and frequency adjustments can then be made independently for each filters. This allows Channel 1 & Channel 2 bandwidths to be overlapped or separated. Response selects the type of filter characteristics to be used for both filters. Low Pass Filter Slope selects the desired slope for the filter on Channel 2. High Pass Filter Slope selects the desired slope for the filter on Channel 1. CD Horn adds a high-frequency shelving filter on Channel 1 only, with adjustable gain (0~+18dB) and a 6dB/octave slope, as pre-emphasis for `constant-directivity' horns. `Meters' are provided on each channel to display input/output levels at the Crossover section. The order in which MSP22e processing blocks are positioned in the signal path may be customized (see Signal Path Order Form screen on pg. From the factory, Crossover is the fifth processing block, positioned between Gain Matrix #2 and the Delay. 9 SETUP DIGITAL DELAY SCREEN The Digital Delay screen is used to adjust delay time settings for each Channel. Delay time is shown in the window, with adjacent buttons providing the up/down adjustments. Delay time may also be entered directly into the window, but will be rounded to the nearest available setting. Msec allows delay times to instead be entered & calculated in terms of distance measurements (inches, feet, centimeters, or meters). NOTE: Distances should be measured in terms of the difference between direct and delayed sound sources, with respect to the listener (i. e. . . direct source to listener = 200 feet; delayed source to listener = 20 feet; distance = 180 feet). Also, when sounds from the direct source & delayed source reach the listener at roughly the same volume level, additional delay (approximately 10~30 milliseconds) may be added to the calculated delay time. This added delay will produce what is known as the `Haas Effect', which gives the listener the impression that all sound is emanating from the direct source. This added delay should be fine-tuned by ear to achieve the desired results. Bypass temporarily sets delay time for the correspnding Channel to minimum (1. 333 msec). The order in which MSP22e processing blocks are positioned in the signal path may be customized (see Signal Path Order Form screen on pg. From the factory, Delay is the sixth processing block, positioned between the Crossover and the MSP22e analog outputs. 10 SETUP LOGIC INPUT DEFINITIONS SCREEN The Logic Input Definitions screen is used to assign specific `actions' to the sixteen Logic Inputs. Logic Inputs allow remote control of the MSP22e via external circuits, such as switches, contact-closures, active driver circuits, and/or `open-collector' logic outputs (see Logic Inputs on pg. However, using the Logic Input Definitions screen, each Logic Input may be assigned various `actions'. [. . . ] The eighth data bit of each character (the most significant bit) should always be 0. The computer should not be set for either hardware (DTR) or software (XON/XOFF) flow control. The baud rate may be changed to either 2400, 9600, or 19200 bits per second by means of the software (see Setup on pg. NOTE: Baud rate may need to be changed when the MSP22e is being used in RS-232 systems with other products having a lower maximum baud rate. [. . . ]