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Boss SY-1 Guitar Synthesizer Effect Pedal

SKU:  ae00-2771
Manufacturer Part #:  SY-1
Boss SY-1 Guitar Synthesizer Effect Pedal

Journey to New Sonic Frontiers

With the SY-1, it’s never been easier to infuse your creative arsenal with BOSS’s legendary guitar synth technology. This amazingly expressive tool is filled with 121 ultra-responsive sounds, all distilled down into a BOSS compact pedal that slides easily into any setup. Best of all, it’s as simple to use as a standard stompbox, so you don’t need any background in synth programming to bring a new world of sonic textures to your music.

Standard Features

    Authentic BOSS polyphonic guitar synth in a compact pedal

    No special pickup required—play rich, dynamic synth tones with any guitar or bass

    121 total sounds (11 types and 11 variations), all ready to play with no programming knowledge needed

    Includes a wide variety of analog-style synth sounds, from leads, basses, and layered organs to sweeping pads and arpeggiated sequences

    Latency-free performance for unrestricted musical expression

    Quickly adjust sounds to taste with Tone/Rate and Depth controls

    Hold function for playing normal guitar over sustained synth voices

    Blend synth and normal guitar sounds with independent level controls

    Parallel send/return loop for easy integration with other pedals on your board

    Mode switch optimizes the synth engine for guitar or bass

    Supports extended control with an external footswitch or expression pedal


Get interactive with our custom TonePedia player and explore hundreds of sound variations. Select your instrument, tweak and choose pedal settings.

*Use headphones and Google Chrome web browser for optimal experience.

Expressive Synth Sounds, No Programming Needed

The SY-1 transforms any guitar or bass into a versatile synthesizer that’s fun, inspiring, and ready to play. Backed by advanced tech first developed for the SY-300, this super-cool pedal delivers a huge selection of analog-style synth sounds while occupying minimal space on your board. What’s more, all the sounds are polyphonic, allowing you to play both single notes and chords.

Plug-and-Play and Latency-Free

The SY-1 can be used with any guitar or bass via a standard 1/4-inch cable, providing an easy, plug-and-play experience. Thanks to custom DSP and the latest BOSS innovations, the SY-1 offers latency-free performance that’s a natural extension of your instrument, letting you to play freely and organically without altering your normal technique in any way.

A Universe of Synth Sounds Inside

With its 11 categories and 121 total sounds, the SY-1 puts an enormous array of synth colors at your fingertips. Expressive leads, sweeping pads, layered organs, fat basses, and more are all on tap, plus a variety of rhythmic synth patterns that are a blast to jam with. And with the grab-and-go Tone/Rate and Depth knobs, you’re able to adjust any synth voice just how you like, including changing the pitch on some sounds.

At Home in Any Rig

As a standard BOSS compact, the SY-1 drops into a serial pedal chain like any other stomp. But with the send/return loop and dedicated mix controls, it’s also possible to blend one or more pedals in parallel with the SY-1’s synth voices. For example, you can patch drive pedals in the loop, and then send the combined output to mod, delay, and reverb pedals for overall processing. The send can be used as a direct out as well, enabling you to route synth and guitar sounds to separate destinations.

Enhance Performances with Real-Time Control

The SY-1 offers a numbers of ways to make your synth performances even more dynamic and expressive. Pressing and holding the pedal switch sustains the last-played synth sound, allowing you to jam with regular guitar over the top. You can also connect an external footswitch for tap tempo and octave-shift effects, or plug in an expression pedal for continuous Tone/Rate control.

SY-1 Sound Types

• LEAD 1/2—A wide range of sounds suitable for single-note soloing.

• PAD—Full tones that work great with chords, from layered pads to synth brass and more.

• BASS—Fat synth bass sounds, including filtered and sub-octave tones.

• STR—Classic analog-style strings, including layered voices and sweeping textures.

• ORGAN—A large selection of organ sounds, including many with rotary-style modulation.

• BELL—Percussive synth sounds with metallic resonance.

• SFX 1/2—A variety of synth sound effects, including explosive one-shot sounds, animated pitch/filter voices, and more.

• SEQ 1/2—Pulsating sounds with rhythmic pitch or filter changes.

Nominal Input Level

    INPUT, RETURN: -20 dBu

Input Impedance

    INPUT, RETURN: 2.2 M ohms

Nominal Output Level

    OUTPUT, SEND: -20 dBu

Output Impedance

    OUTPUT, SEND: 1 k ohms

Recommended Load Impedance

    10 k ohms or greater


    Buffered bypass


    Pedal switch

    GUITAR/BASS switch

    TYPE knob

    VARIATION knob

    TONE knob

    DEPTH knob

    EFFECT knob

    DIRECT knob


    CHECK indicator (Serves also as battery check indicator)


    INPUT jack: 1/4-inch phone type

    OUTPUT jack: 1/4-inch phone type

    SEND jack: 1/4-inch phone type

    RETURN jack: 1/4-inch phone type

    EXP/CTL jack: Stereo 1/4-inch phone type

    DC IN jack

Power Supply

    Alkaline battery (9 V, 6LR61)

    AC adaptor (PSA series: sold separately)

Current Draw

    85 mA

Expected battery life under continuous use

    Alkaline: Approx. 3 hours

    *These figures will vary depending on the actual conditions of use.


    Owner's manual

    Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information")

    Alkaline battery (9 V, 6LR61)

Options (sold separately)

    AC adaptor: PSA series

    Footswitch: FS-5U

    Dual footswitch: FS-6, FS-7

    Expression pedal: FV-500H, FV-500L, EV-30, Roland EV-5

Size and Weight


    73 mm

    2-7/8 inches


    129 mm

    5-1/8 inches


    59 mm

    2-3/8 inches

Weight (including battery)

    450 g

    1 lb



In stock
SKU:  ae00-2771^SY-1
Manufacturer Part #:  SY-1
Weight:  2.00
Price: $242.99

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