Audio Engineering

262 Chapter 8 8.4.8.1 Direct Current Management With direct-coupled circuitry, unwanted DC “ offset voltages ” will be amplifi e ...

Interfacing and Processing 263 8.4.8.2 Autonulling Direct current offset may be continually forced to near zero volts by a servo ...

264 Chapter 8 Second, the outputs of crossovers or consoles, or misconnected amps, which are kaput and have DC faults, so the ou ...

Interfacing and Processing 265 8.5.2 Scope The parts most at risk from excess input voltages are the solid-state active devices, ...

266 Chapter 8 The input stage’s supply rail voltage usually has a large bearing on the maximum safe DM and CM input voltages. He ...

Interfacing and Processing 267 Back-to-back zeners to 0 V, working in concert with series current-limiting resistors (which may ...

268 Chapter 8 8.6.1.1 Characteristics As “ voltage matching ” is the norm for modern audio, pots are nearly always wired in the ...

Interfacing and Processing 269 amplifi er’s capability are useful. It’s also relevant where a quick sweep to ∞ (infi nite atten ...

270 Chapter 8 19 17 22 15 24 13.7 26 12.1 29 10.7 33 9.3 38 7.8 47 5.9 3.7 52 1.5  0 Attenuation (dB) 6 8 5 11 4 13 3 16 2.5 18 ...

Interfacing and Processing 271 8.6.1.6 Position As in other analogue audio circuits, the placement of any gain control device re ...

272 Chapter 8 only be turned with a screwdriver. This avoids not just casual tampering, but knobs being moved (and settings lost ...

Interfacing and Processing 273 Usually a motor connects to the same shaft as a knob, but the latter via a slipping clutch. Eithe ...

274 Chapter 8 Tolerance is an issue and is dependent on the constituent parts, both semiconductors. Because the tolerance of bot ...

Interfacing and Processing 275 feed through from the digital control signal. Unlike the previous elements, an M-DAC has discrete ...

276 Chapter 8 independent of all the major temperature gradients, dependent on drive patterns, siting and even amplifi er and ra ...

Interfacing and Processing 277 Paradoxically, the compression threshold (at least for bass frequencies) should be increased if t ...

278 Chapter 8 8.6.7 Soft Clip “ Soft clip ” is a feature that aims to defeat the suddenness of the onset of hard distortion abov ...

Interfacing and Processing 279 With a virtual control surface, the traditional limitation vanishes. In turn, installation setup, ...

280 Chapter 8 Today’s computer-control systems theoretically offer: the remote control of many of most of the facilities and co ...

Interfacing and Processing 281 Duncan , Ben , ‘ Building the world’s biggest PA ’ , Lighting and Sound International , October. ...