
Rex Features
The Scottish singer's younger sibling was born without the ability to hear but had a cochlear implant fitted a few years ago to help him discern pitch.
Tunstall wants to use hi-tempo beats that Daniel will be able to pick up. She said: "I've always wanted to write some music for Daniel, and find out scientifically what would be really pleasing to him.
"He loves beats. He tells me about these brilliant deaf raves he has been to, where all hearing aids come out and the volume is turned up."
She added: "He played drums on stage at my last party. He is inspiring, he has absolutely flown in the face of adversity."









