Drop C Tuning Online Tuner

Drop C: Heavy Music’s Home Tuning

Drop C tuning reads C G C F A D from the thickest string up, and the neatest way to understand it is in two moves: shift the whole guitar down a whole step into D standard, then drop the 6th string a further whole step to C. The result pairs a genuinely deep low end — the open 6th sits a major third below a standard low E — with the signature drop-tuning geometry: the bottom two strings are an octave-plus-fifth stack, so one finger barred across them is a power chord. That combination of depth and speed is why drop C became the workhorse of metal and metalcore rhythm playing.

The route down from standard

From E A D G B E, five strings each descend one whole step: the A becomes G, D becomes C, G becomes F, B becomes A, and the high E becomes D. The 6th string travels twice that distance, from E all the way to C — a major third of slack. Turn that peg in stages and check as you go; it’s the drop players most often overshoot. The tuner tracks each string against its C G C F A D target while it falls, and if the long E-to-C descent momentarily reads against a neighboring peg, tap C2 to pin it and keep turning.

Strings and tension: why gauge matters at C

Two whole steps of detuning removes a serious amount of tension, and light strings feel it first — a 10-gauge set at drop C buzzes, flaps under the pick, and drifts sharp on hard attacks. Moving to 11s or 12s (or a purpose-built drop set with a beefier 6th string) restores enough tension for clear pitch and tight palm mutes. Expect the settling ritual too: freshly strung guitars this low need several rounds of tune, play, and retune before the neck and strings agree to stay put, so run the full six-peg loop more than once and don’t trust the first green checks on new strings.

Coaxing 65 Hz out of a laptop mic

The open C2 vibrates at 65.4 Hz — the same fundamental as a cello’s bottom string, and right at the edge of what built-in microphones reproduce. Give the tuner the best possible signal: a firm, confident pluck close to the mic, other strings muted so nothing rings over it, and a quiet room if you can manage one. Electric players get the cleanest readings by miking a small amp rather than the unplugged strings. The higher five strings are easy by comparison; it’s worth tuning them first so your ear has context when the big string comes down.

Picking between the low tunings

If you want the drop-chord shape without leaving standard’s neighborhood, drop D moves a single string and keeps familiar tension. D standard is drop C’s parent — all six strings a whole step down with standard fingerings intact — and half step down is the subtler classic-rock shade of the same idea. When the set list swings back to E, the standard-tuning guitar tuner brings everything home, and the note identifiercan name any pitch when you’re not sure where a string currently sits.