User manual BIAMP MSP22E AND MSP11

[. . . ] Since CDs can be recorded at different levels, the volume from one CD to another can vary significantly. In the background music system it is desirable for the music to maintain a consistent level. A Limiter or Compressor could be employed, but they would only squash the dynamics, and diminish the quality of the music signal. A Leveler, on the other hand, actually controls the overall level of the signal, without adversely affecting the dynamics of the signal itself. [. . . ] From the factory, Input 1 is routed to Channel 1 only, and Input 2 is routed to Channel 2 only, providing two independent signal paths. Levels are adjusted by dragging the corresponding `faders' up or down. `Meters' are provided on each channel to display input/output levels at Gain Matrix #1. NOTE: For best performance, adjust levels so the meters show occasional peaks in the yellow area, but never to the top (red). Invert allows the phase of each corresponding signal path to be reversed (180°). The order in which the MSP22e processing blocks are positioned in the signal path may be customized (see Signal Path Order Form screen on pg. From the factory, Gain Matrix #2 is the fourth processing block, positioned between the EQ and the Crossover. Under these circumstances, Gain Matrix #2 might typically be used to allow Gain Manager & EQ processing for two independent input signals, which can then be combined as a common feed to the Crossover & Delay (HF & LF outputs or delayed zones). The appearance of the Gain Matrix #2 screen will change, instead providing a 4x4 mix-matrix, when `Gain Matrix Linking' is activated (see Configuration Options screen on pg. 13). 8 SETUP CROSSOVER SCREEN The Crossover screen is used to select the crossover mode, and adjust the crossover settings. Channel 1 provides the High-Pass Filter (high-frequency output) and Channel 2 provides the Low-Pass Filter (low-frequency output). 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. From the factory, Logic Inputs 1~16 have no pre-programmed functions. However, using the Logic Input Definitions screen, each Logic Input may be assigned various `actions'. Logic Inputs selects which Logic Input is to be defined. [. . . ] The eighth data bit of each character (the most significant bit) should always be 0. The computer should not echo the characters it receives. 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. [. . . ]