DirectSound is a part of the Microsoft DirectX suite, designed to manage audio playback in computer applications and games. It allows developers to create immersive sound experiences by providing low-latency audio playback and support for 3D sound positioning. This technology helps in rendering sound effects that enhance the overall user experience. By using DirectSound, developers can control audio streams, manage sound buffers, and apply effects like reverb and echo. It works closely with other components of DirectX, ensuring that audio and visual elements are synchronized for a seamless multimedia experience.