The Trikitixa is a type two-row diatonic accordion used in Basque music. It is a two-row accordion, keyed a fourth apart, and has 23 treble buttons. It is a fourth button start accordion, with the first two buttons on each row providing accidentals, so players can play a chromatic scale. On the left hand there are 12 unisonoric basses, that give 5 major and 1 minor chord. Usually, trikitixas have three or four treble reeds, with no stops, and five bass voices. The most common tuning nowadays is Bb/Eb, althoug G/C is quite common tuning. In the past, trikitixas were tuned in C#/F#.