Voice Wish: Boost your greeting cards with your own audio wishes!

Hello everyone! As always during the holiday season I was sending out some postcards. This year I wanted to do something extraordinary for my friends so I came up with an idea to sing them a song and include it with the postcard. I recorded a short audio (you can actually check it out, the QR code is the second screenshot), uploaded it to a server and added the link to a QR code that I later printed out and stuck onto the card. They really liked they idea so I decided to quickly put together a website where the audio can be recorded and converted to a printable QR code. I think it can add a really nice touch to every greeting card whether it's for Christmas or any other occasion. Please let me know what do you think about the idea :) Happy Holiday everyone!