noodle
"improvisation" is the formal term
the slang term is "jamming"or "to noodle"
Messing around, or playing random things, generally with other people, or by yourself is called jamming.
As in, "When I was a kid my dream was to jam with Jimi Hendrix and his band?" or "My boyfriend and his band were jamming all night and I couldn't get any sleep?"
improv, jammin ,noodle
Guitar is a musical instrument
ostinato.
MIDI is an interface and protocol to connect musical instruments; it stands for musical instrument digital interface.
Panpipes
A bellist is a rare term for a person who rings bells, especially when as part of a musical instrument ensemble.
Hindi language has a single word 'saaz' for 'musical instrument'.
It is a slang term for the word money It is a slang term for the word money It is a slang term for the word money is a slang term for the word money is a slang term for the word money
"Diddle" can have different meanings depending on the context. It can be a slang term for cheating or swindling someone, or it can refer to moving quickly and lightly. It is also a term for playing a simple tune on a musical instrument.
Another term for ad lib is improv, or improvise.
There is no slang term for oxygen.
The term concerto means a musical composition that is designed generally for a solo instrument. It can also consist of multiple instruments as part of a orchestra.
I'm guessing you mean "unison."