Every audiovisual system is a signal chain from transducer to output device. Audio flows from acoustic energy through microphone, preamp, converter, DAW, processor, amplifier, to loudspeaker. Video flows from photon to sensor, ISP, codec, router, color grade, encoder, to display. Click any stage to inspect it.
Digital audio workstations and mixing consoles route signals through a virtual summing matrix. Each channel has a fader, EQ, dynamics, sends, and a pan position. The summed stereo bus feeds output stages. Click and drag faders — levels update with exponential smoothing.
A parametric equalizer allows precise control over gain, center frequency, and Q (bandwidth) of each filter band. Shelving filters boost or cut below/above a corner frequency; peaking filters target a band; notch filters eliminate narrowband problems like hum and resonances.
Video signals are characterized by color space (BT.709, BT.2020, P3), dynamic range (SDR, HDR10, Dolby Vision), bit depth (8-bit, 10-bit, 12-bit), and chroma subsampling (4:4:4, 4:2:2, 4:2:0). Color grading maps scene-referred camera LOG footage to an output-referred display standard through a LUT pipeline.
Audio-video synchronization (AV sync, lipsync) ensures the audio signal matches the corresponding video frame. The human perceptual window is asymmetric: viewers tolerate up to 125ms of audio leading video but only ~45ms of audio lagging. Move the slider to observe the desynchronization effect.
A live sound reinforcement system distributes audio from stage to audience through an amplified loudspeaker array. Line arrays exploit directional control — coupling at low frequencies for throw, cardioid configuration for rear rejection, subwoofer cardioid arrays for low-frequency pattern control. Room acoustic modes create resonances that equalization must address.
The AV ecosystem spans studio engineers, live system designers, acousticians, and artists working at the intersection of audio and visual systems — from recording studios to arena tours to interactive installations.
Core terminology spanning audio signal processing, video engineering, acoustic design, and AV system integration.