Snark SN-11 All-Instrument Clip-On Tuner Blue SN-11 All-Instrument Clip-On Tuner Blue The SN-11 from Snark is a fully chromatic clip-on tuner with a large display, a transpose function and even a pitch calibration option Say you are playing with an upright piano that is about a quarter-tone flat Simply calibrate the tuner to a note on the piano and the relative tuning adjusts itself The SN-11 is ideal for guitar, but works well for any stringed instrument and is viable for brass and woodwind as well