In space, no one can hear you sing or play a tune. There s no air in space. Sound is the result of vibrations that travel though air. A plucked guitar string vibrates, causing the air around it to vibrate. The vibrations zip through the air, into your ears and you hear.
Space is an empty and airless vacuum.
No air means no noise. Astronauts out on spacewalks communicate via radio. Of course, once the astronauts are back inside the spacecraft, they can hear and be heard normally. Because the craft is filled with air. They can make as much noise and play whatever music they want.