Please add a tuner. If possible a sophisticated one for pedal steel guitars or other instruments, that need more sophisticated tuning: Should have reference tone adjustment (440Hz +-10Hz in 0.5Hz steps) for each tuned string. String to tune is selected by the user in this (manual) mode, reference tone is stored and called back with each string. Destination pitch of each string and count of strings is definable by the user. For standard guitars a "normal" tuner in automatic mode will do.