Can music be put into a QR code?
I was asked this recently. The practicle answer is no, the amount of data in a digital sound file is too large for QR codes.
The solution is to put the sound resource on a public network like Internet and then have the the QR code contain a pointer to the resource.
The above example is a QR code that links directly to a MP3 audio file. Most smart phones with audio players will start before the file has been completely downloaded. If you do not want the audio files downloadable, the QR code should contain a pointer to an audio streaming service.