The FormatFromName command examines the passed fileName and returns the audio file format based on the extension. It returns either a member of AudioTools[Formats], or NULL if it was unable to guess.

$\mathrm{with}\left(\mathrm{AudioTools}\right)\:$

$\mathrm{FormatFromName}\left(''atis.wav''\right)$

$\mathrm{WAVE}$

$\mathrm{FormatFromName}\left(''fritz.jpg''\right)$