My dream service

I did not try it myself (by the way, give me a link :), but there is a service where you sing a melody, and he is looking for the appropriate song. I remembered about him today, and I thought that if you have it, it means you can do another service in Priiii Intsi: you choose an instrument, you sing a melody - and here it is, played on a piano or violin, your own melody! Download, listen ... Eh ... there is / will be this?