Home › Forums › Products › Stompboxes › Opto/Bias Tremolo / Phaser Question › Reply To: Opto/Bias Tremolo / Phaser Question July 15, 2011 at 7:33 pm #122404 achaputModerator Hello, For the style of Tremolo you're looking for I would start with Factory Preset 7:1, Tumbleweed Trem. It uses a SINE wave.
