Behringer SHARK DSP110 Manual - Page 18

SHARK DSP110 2.3 The integrated Delay In addition to speakers on or near the stage, major-scale installations often have speaker groups positioned at a distance to the stage or flown above the audience, in order to provide listeners away from the stage with direct sound. However, since sound needs some time to travel around (343.6 m/sec at 20°C, accelerates by 0.6 m/ sec per °C), it reaches the audience not simultaneously but gets delayed by a certain amount. To make up for the different run times between stage and remote speakers, the latter must be provided with an electronically delayed signal, which is usually done by means of special-purpose Delay devices. You won’t need them, however, when you’ve got a SHARK, as the DSP110 integrates a Delay Line circuit giving you the same convenience of operation as dedicated devices. Simply measure the distance between the various speaker groups and enter this value (in meters or feet). Chapter 2.1.3 shows you how to wire the DSP110 in this type of application. Fig. 2.6: Sound reinforcement application with different speaker positions 2.4 The Noise Gate function The main task of a Noise Gate is to separate unwanted background noise from wanted signals and remove noise “inaudibly”. A so-called downward Expander automatically reduces the overall level of all signals below an adjustable threshold and thus expands the dynamic range of the program material. In live or stage applications and multi-microphone systems, in particular, the SHARK has a variety of possible uses: as a moderately and accurately set Gate it efficiently suppresses background noise, compressor-induced noise build-up and crosstalk 18 2. APPLICATIONS