You should rest assured that QR codes would store binary data. As a result, you would be able to store all kinds of information in the QR code. However, the overall storage capacity of the QR code would be limited to a maximum of 3kB. Therefore, you would not be able to store sounds and images directly.
The link to the site https://www.oysso.com/qr-landing-pages-test/take-photos would cater you with multimedia content usually in a relatively more sensible manner for showing various kinds of image galleries or sound files through the QR code. Oysso would be able to handle your specific needs in the best manner possible.