The BOSS SY-1 Synthesizer puts a world of expressive synth sounds at your feet. This innovative pedal packs 121 polyphonic voices into an easy-to-use compact stompbox, transforming your guitar into an analog-style synthesizer. Just plug in and instantly access leads, pads, organs and basses with the turn of a knob, all with zero latency.

Tweak Any Sound to Perfection
With 11 categories and over 100 voices, the SY-1 offers an enormous array of synth tones with analog style. Expressive leads, sweeping pads, layered organs and fat basses are all available at your command. What's more, the Tone/Rate and Depth knobs let you adjust any synth voice to your liking, including changing the pitch on select sounds. Whether you need a searing lead to cut through the mix or a warm pad to fill in the background, the SY-1 puts the perfect synth tone at your fingertips.

Seamless Integration Into Any Rig
Despite its advanced technology, the SY-1 is as easy to use as any standard compact pedal. It connects to your guitar via a 1/4' cable and slides effortlessly into your existing pedalboard setup. The SY-1 also features a send/return loop and dedicated mix controls, allowing you to blend other pedals, like drive, modulation or delay, in parallel with the synth sounds. You can even use the send as a direct out to route the synth and guitar tones to separate destinations for maximum flexibility.

Enhance Your Performance
The SY-1 offers several ways to make your synth performances more dynamic and expressive. Press and hold the pedal switch to sustain the last-played synth sound, then jam over the top with your guitar. You can also connect an external footswitch for tap tempo and octave shift effects, or plug