A game call includes a first resonant member. A second resonant member is telescopically operable within the first resonant member between a plurality of telescopic positions. A harmonic carriage has a body and a reed assembly. The harmonic carriage is slidably operable within the second resonant member. The first and second resonant members and the harmonic carriage are slidably operable relative to one another to adjust a resonant length defined between the reed assembly and a resonating end of the first resonant member.