professional audio video installations, professional AV, proAV, audio, video, digital media, projection technology, LED, cinema, digital cinema, optics, cameras, file formats, bandwidth, recording, acoustics, room acoustic, wire-resistance, AWG wire parameters, AWG wire data, MIDI, Cobranet, ISDN, showcontrol, mediensteuerung, 100V installations, 70V installations, RS-232, RS232, RJ-45, Sony 9-pin, VGA monitor pinout, directivity index, inverse square law, critical distance, normalled patchbays,