Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. NARRATOR: Explore adding sound to your holiday card by using sounds from the Scratch library, uploading ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Developed in the late '70s by hip-hop DJs Grand Wizard Theodore, Kool Herc et al, scratching is ...