Free The Tone SG-1C Silky Groove Compressor

The Free The Tone SG-1C Silky Groove is an analog compressor pedal from the Japanese builder Free The Tone, a company better known in some circles for its digital delay pedals¹. It became available worldwide on November 15, 2021, released alongside the CC-1B Crunchy Chime booster².

The pedal is based on the original Silky Comp SC-1, which Free The Tone discontinued in 2018¹³. According to Pedal of the Day, the Silky Groove "inherits the former's sound, enhancing and ease of use" while adding a Dry Mix circuit². The maker's own description promises compression that stays out of the way of what you actually play: reviewers describe it as producing "silky-smooth and natural compression without impairing important elements during performance" such as the true character of your guitar or bass and your subtle plucking and picking nuance².

A silky, natural compressor with a dry mix

The core idea of the SG-1C is compression you can set without losing the feel of your own touch. Where some compressors clamp the whole signal and flatten dynamics, the Silky Groove's Dry Mix control lets you blend your uncompressed dry signal back in with the compressed one, so the sustained, evened-out compressed sound sits alongside the original attack and nuance².

Free The Tone positions the pedal as a refinement rather than a redesign. Delicious Audio notes that the SG-1C "replaces in their roster the similarly named Silky Comp SC-1," and that it "is based on the SILKY COMP which was highly appreciated in our Custom Series"¹. The original SC-1 ended production in 2018³, so the Silky Groove is the current home of that circuit in the standard lineup.

The pedal also carries Free The Tone's original HTS (Holistic Tonal Solution) circuit, which the maker says prevents sound degradation even when the effect is switched off²⁵. In practice that means the SG-1C acts as a buffer in your chain whether the compression is engaged or bypassed, which is worth knowing if you already run a dedicated buffer elsewhere on the board.

The controls: Attack and Sustain

Four knobs handle everything⁴:

The Attack and Sustain controls are designed with a gentle curve rather than a sharp one. Free The Tone says this avoids abrupt changes and makes the knobs easy to adjust, and Pedal of the Day echoes that the pair offers "an easy-to-adjust gentle curve to prevent rapid changes, for smooth operation at any settings"². For a player new to compressors, that means small knob movements produce predictable, gradual shifts rather than sudden jumps in feel.

Power and connections

The SG-1C runs on either a 9V 006P-type battery or a DC9V AC adapter with a center-negative plug, through a dedicated DC9V input jack⁴. That is the same arrangement as most compact pedals, so it works with a standard pedalboard power supply. The input impedance is rated at 500kΩ or higher and the output load impedance at 10kΩ or higher⁴.

The Silky Comp connection and the Custom Shop version

The SG-1C's family tree matters if you are comparing Free The Tone compressors. The original Silky Comp SC-1 was discontinued in 2018³⁴, and the Silky Groove carries its sound forward with the added Dry Mix control²¹. There is also a Custom Shop model, the SG-1C-CS, which Free The Tone says inherits the Custom Series Silky Comp sound "in a more natural, smoother form"⁵.

The Custom Shop version shares the standard pedal's practical layout:

• The same Attack and Sustain controls with the same gentle adjustment curve⁵
• The same DC9V adapter jack and 9V 006P battery support⁵
• 1/4-inch standard jacks for input and output⁵
• The HTS (Holistic Tonal Solution) circuit, preventing sound degradation with the effect off⁵
• A package exclusive to Custom Shop models⁵

What reviewers said

Pedal of the Day reviewed the SG-1C alongside the CC-1B Crunchy Chime booster and was positive about both²:

That placement advice, early in the chain, matches how most players run a compressor: before drive and time-based effects, so the compressed signal feeds those later pedals evenly.

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