Sound is omnidirectional and omnipresent, with qualities like timbre, level, and continuity that must be considered when recording. Unlike light, sound dissipates quickly on a logarithmic scale. While background noise, echo/reverb, and distortion cannot be removed in post-production, effects like additional background noise, echo/reverb, music, foley, and sound effects can be added. When recording audio, it is important to consider the space for booms, record as clean and flat as possible while monitoring, and re-shoot if needed. Using clappers and consistent microphone placement and techniques are essential for continuity.