KORG GA-1 Tuner for GuitarBass

It features an LCD needle meter that is easy to read and shows pitch accurately. It has a quinta-flat tuning mode that can measure pitch down from 1 semitone to 5 semitones. It also supports tuning of 7-string guitars and 6-string basses. It has a sound out mode that can generate a reference tone from the built-in speaker. The built-in microphone also supports tuning of acoustic guitars, etc.