The type(x, AudioTools:-Audio) function call returns true if x is of type AudioTools:-Audio.

Within the AudioTools package, audio data is represented as dense rectangular Arrays of 64-bit hardware floating-point numbers. Monophonic audio data is one-dimensional, whereas stereo (or more channel) audio data is two-dimensional (the second dimension representing the individual channels).

Audio data also has three attributes describing the data:

The first is the sample rate, in samples per second.

The second is the number of bits per sample that were recorded in the file.

The third is the sub-format of the file, if applicable (or zero otherwise - some file formats, like .WAV, have a number of sub-formats, like PCM, ADPCM, or IEEE_FLOAT, represented as an integer from 1 to 3).

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

$\mathrm{audiofile}≔\mathrm{Read}\left(\mathrm{cat}\left(\mathrm{kernelopts}\left(\mathrm{datadir}\right)\,''/audio/stereo.wav''\right)\right)\:$

$\mathrm{type}\left(\mathrm{audiofile}\,\mathrm{AudioTools}:-\mathrm{Audio}\right)$

$\mathrm{true}$

The type/ AudioTools:-Audio command was updated in Maple 2017.