INDEX High-pass filters, audio mixer , 116 Hitachi , 272 circuit , 315 Hitachi Class-G biasing system , 315 Horizontal cabling , 165 House curves , 549­550 HPF/LPF, audio mixer , 114 Hub , 165 Human auditory system , 19­21 Humidity effects, on sound transmission , 71­73 Hummer II , 241 Hysteresis curves , 359 I IEC room , 562 real versus simulated , 563­564 IEEE 1394 , 163­164 IID . See Interaural intensity difference (IID) Image shift , 16 IMF Electronics , 391 Impact noises , 596­599 Impedance , 219 , 220 in loudspeaker , 338­339 hardware instrument types drum machine , 477­478 sample resynthesis software systems , 475­476 samplers , 476­477 software synthesizer , 475­476 synth , 474­475 M-Audio MIDISPORT 4X4 , 474 Interfaces, electronics of balanced interfaces , 222­223 cable capacitance , 224­225 capacitive coupling , 225­226 defined , 222 impedance matching , 223­224 inductive coupling , 226­228 line drivers , 224­225 problems in systems , 235­244 balanced cable issues , 241­243 bandwidth and , 244 coupling in unbalanced cables , 243­244 degraded common-mode rejection , 236­238 pin 1 problem , 238­241 RF interference , 244 shielding , 225­226 MIDI Out , 471 MIDI Thru , 471 JBL high-frequency compression driver , 367 J-box , 256 K KEF loudspeaker company , 397 Keyboard controller, MIDI , 478­479 L Large room . See also Critical distance (D c ) frequency (FL) , 499­500 reverberation . See Reverberation, large room Sabinian equation for . See Sabinian equation, for large room LCD . See Liquid crystal display (LCD) Leakage current noise , 233 LEDE . See Live End Dead End (LEDE) LEV . See Listener envelopment (LEV) Level setting, in audio mixer , 141­142 Lighter weight isolation systems , 608 Lighting, artificial