Cusack Music Tap-A-Scream OverdriveWe have recently upgraded the software. Now, by holding the bypass switch for a 200 milliseconds you can now turn the tremolo on and off on the fly! Keep in mind that even with the tremolo effect off the gain knob still interacts with the rate LED. With the gain turned all the way down the LED will be fully on, but it will gradually dim until fully off as the gain is turned up. What started as a joke became the worlds first and only tap tempo