Reference AudioFormatDetect

Detect the audio format of a file. An EAudioFormatException is raised if the format is known but the channels, sample size or sample rate are not supported.

function AudioFormatDetect(const FileName: string): TAudioFormat; overload;

Detect the audio format of a stream, which is read from its start

function AudioFormatDetect(Stream: TStream): TAudioFormat; overload;