AudioDestinationNode

The AudioDestinationNode is an interface in the Web Audio API that represents the final destination for all audio processing, typically the device's audio output. It serves as the endpoint for audio graphs, where the processed audio signal is rendered and played to the user.

An AudioDestinationNode is an abstract node and cannot be directly created by the user. Instead, it is implicitly created when an AudioContext is initialized. The AudioContext provides access to the system's audio hardware, and the AudioDestinationNode is its representation within the API.

The primary purpose of an AudioDestinationNode is to receive audio data from other nodes in the audio processing graph. Audio signals are routed through various processing nodes (like oscillators, filters, or gain controllers) and eventually reach the AudioDestinationNode to be played.

Key properties of the AudioDestinationNode include its sample rate, which corresponds to the hardware's sample rate, and its channel count, indicating the number of audio channels supported by the output device. These properties are generally read-only and determined by the user's audio hardware and browser settings.

While it's not directly manipulated like other audio nodes, understanding the AudioDestinationNode is crucial for comprehending how audio is outputted in the Web Audio API. It acts as the gateway for audible sound, ensuring that the processed audio reaches the listener's ears.