An accordion playing a sustained B1 - clip at the tail end
A plucked note on a cello.
An electric guitar picks the harmonic of a single B note on the 7th fret of an open E string with a clean ...
An acoustic guitar playing a single A2 note.
A single deep metallic electronic bass note on C.
A melodica playing a sustained G2 note
An accordion playing a single, short D2
An accordian or squeezebox chord in the key of G.