quarter tone revolution

Play beyond your limits.

Quarter tones on every note and scale.
Now for only $276

QUARTBACK nano

Premium note shifter, refined and crafted by
professionals engineers

explore new range

Give your music unlimited possibilities
with wider tone range.

live conversion

Convert notes easily when you are playing live

instruments

Connect with any electric-melodic instruments

new patent

Innovative and fully patented technology

low latency

Unique processing technology for a 0% latency feel