Grey Pilgrim
GP Tools
[ boot ] gp-tools v2.0 ............
OK
[ load ] free tools for guitarists, live sound & music [ note ] no sign-ups · no tracking · runs in your browser [ tip ] add to home screen → installs as an app, works offline
Amps, cabs & power
Ohms Calculator
LIVE
Match amps & speaker cabs safely — impedance, wiring diagrams, power checks, a gear bank, and plain-English explanations.
Cab Wiring Designer
LIVE
Wire matched speakers to hit a target impedance — series, parallel, series-parallel.
Pedalboard Power Planner
LIVE
Will your supply handle your board? Current draw vs outputs, voltage & isolation checks per output.
Watts → Loudness
LIVE
How loud is louder? Watts + speaker sensitivity → SPL, and why 100W isn't twice 50W.
Breaker Checker
LIVE
Will your backline + PA trip the breaker? Wall draw vs the circuit (15/20A), with headroom.
Guitar, strings & tuning
String Tension & Down-Tuning
LIVE
Pick a tuning + scale length + gauges → per-string tension, so nothing goes floppy when you tune down.
Capo & Transpose
LIVE
Find the capo fret, or shift a set of chords to a new key.
Tuner
LIVE
Chromatic tuner via mic/Web Audio, with drop-tuning reference presets.
Tempo & timecode
BPM & Delay Calculator
LIVE
Tap a tempo or type a BPM → delay & reverb times in ms for every note division.
Metronome
LIVE
Click track with time signature, accent & tap tempo.
Timecode & LTC
LIVE
Convert, calculate, generate, and
read
SMPTE timecode — incl. LTC audio (29.97 drop-frame) and a file/live LTC reader.
Gigging
Setlist Timer
LIVE
Add up your set length from song times, with a banter buffer.