A carillon keyboard instrument is provided for playing bells and auxiliary bell tones, with a pedal provided for allowing the player to adjust the relative intensities of the major and minor tones of the bells. The instrument utilizes two sets of vibrator bars, a first set for generating major tones, and a second set for generating minor tones. By mixing the derived signals from corresponding major and minor vibrator bars, and adjusting the relative intensity of the minor signal strength, a new flexibility is provided to the instrument player for generating desired Flemish bell tones.