An acoustic guitar playing a single D note.
A recorder playing a single D note
Short phrase in D played on a trumpet
loop of synthesized arpeggio in C and D, 140 bpm.
An organ passage playing slow and mellow in D minor.
An analog ring of a spiritual or ship's bell with a long decay in the key of D.
Slow synth arp / melody in the key of D
bass playing a reggae riff