User manual BIAMP MSP11

[. . . ] MSP11 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. [. . . ] 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 to minimum (1. 333 msec). 8 SETUP LOGIC INPUT DEFINITION SCREEN The Logic Input Definitions screen is used to assign specific `actions' to the eight Logic Inputs. Logic Inputs allow remote control of the MSP11 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'. NOTE: Since Logic Inputs are controlled by switches, contact-closures, etc. , each Logic Input may be assigned certain actions to perform when the switch is `opened', and different actions to perform when that same switch is `closed'. Binary Mode selects a special group of Logic Inputs which can also be defined. This allows certain actions to be performed only when a specified condition of open/closed Logic Inputs exists within the group. When a Binary Mode is selected, indicators for the chosen group of Logic Inputs will appear below. Binary Combination then selects the specific combination of open/closed (on/off) Logic Inputs that needs to exist (for the assigned actions to be performed). When a combination is selected, indicators will light (red) to designate which of the Logic Inputs within the group are closed (on) for that condition. NOTE: When a Binary Mode is selected, the chosen group of Logic Inputs can no longer be defined individually. It is not necessary to select a Binary Mode when simply defining individual Logic Inputs. Power-Up Actions allows specific actions to be assigned for the MSP11 to perform each time power is turned on. Echo Character selects the RS-232 ASCII character which will be transmitted via the MSP11 Serial Port whenever the selected Logic Input is switched. NOTE: From the factory, no echo characters are assigned to the Logic Inputs. Echo Characters are used primarily for customizing remote control commands amongst various RS-232 controlled products within a system (see RS-232 Control on pg. Store System Preset allows store actions for Temp Presets A~D to be assigned to the selected Logic Input. Temp Presets A~D allow current settings of the MSP11 to be temporarily stored in memory. Temp Presets are useful when re-establishing settings which existed prior to a change. [. . . ] 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 MSP11 is being used in RS-232 systems with other products having a lower maximum baud rate. [. . . ]