Introduction to Sound, Sound characteristics, midi and digital sounds, psychoacoustics; audio recording techniques; sound mixers/synthesizers; audio recording devices; signal ratio. Perception of sound, hearing sensitivity, frequency, range-sound wave length-measuring sound-basic setup of recording system-analog/digital cables, connecters, analogue to digital conversion. Microphone types unidirectional, bidirectional, Omni directional, cardioidsdirection and pickup pattern, noise, choosing the right mike, technique-sound reproduction devices, input devices, various sound file extensions.