Audio Hosting?

This is less of a hardware thread, and more of a software thread, but I'm hoping someone can help.

My brother-in-law passed away this summer from cancer. Before he passed, I was able to record him saying "I love you" to each one of his kids and my sister-in-law. My idea for Christmas gifts for them is to create a picture for their wall that has the waveform of his voice and a QR code that when scanned, they can hear his message. My question is, is there a site out there that could host audio for something like this? Appreciate any help!