According to legend, Apollo became the god of music, after his mischievous brother Hemes, having stolen Apollo's cattle, by way of atonement for this deed, gave Apollo the first ever lyre, which Hermes had constructed from a tortoise shell.
This is an improvisation for an actual replica ancient Greek tortoise shell lyre, featuring an actual foraged Greek land tortoise carapace as a resonator. The improvisation in a minor pentatonic scale, said to have been introduced to Greece sometime in the 7th century BC by the aulos player, Olympos:

"Olympus (or Olympos, Greek: Ὄλυμπος) is the name of two ancient Greek musicians, one mythical who lived before the Trojan war, and one apparently real, who lived in the 7th century BC. Both musicians were connected with the auletic music, which had its origin in Phrygia. It is possible that the elder and mythical Olympus was invented through some mistake respecting the younger and historical Olympus. Instrumental music was apparently introduced into Greece by Olympus" (Wikipedia).

This custom-made lyre uses an actual perfectly preserved Greek land tortoise shell, locally sourced from the remains of land tortoises found in the forests near Europos – about the nearest one can come, to taking the 2400-year-old reconstructed Elgin Lyre out of its display cabinet at the British Museum and playing it!