Current 38+ Tuning Peg Acoustic Guitar. Often guitar pegs are direct references to tuning pegs, or machineheads, (aka: 4.5 out of 5 stars 45. Buy acoustic guitar tuning pegs and get the best deals at the lowest prices on ebay! Get the best deals on acoustic guitar tuning pegs. Tuning Peg Acoustic Guitar - Acoustic Guitar Tuning Pegs Tuners Machine 18 1 3l3r Tuning Keys Heads Mi2830 Amazon Co Uk Musical Instruments The guitar tuner will determine the frequency of the if the tuner shows a deflection, twist the peg, try to change the sound of the string.