Herbs and Stones is a small-batch analog synthesizer builder based in Vittorio Veneto, Italy, founded by Gianluca Herbertson. The company is best known for Liquid Foam, a monophonic analog groovebox built around a dual sequencer and routed with banana-type patch cables, which earned a following after early demos by players like Hainbach. The instruments pair raw CMOS-flavored sound with handmade wooden enclosures, often assembled with help from family and friends, and many designs are also offered as DIY kits.

The lineup has expanded beyond Liquid Foam to include the Gentle Wham analog drum and drone voice, the Pathways modular matrix mixer, and the Mousse semi-modular dual groove synthesizer, alongside smaller utility modules such as Soft Memo, Three Stems, Arms, Legs, Tongues, and Solid Felt. A Eurorack edition of Liquid Foam (Euro Foam) brings the same CMOS overdrive, two-stage waveshaping VCO, and 2-pole resonant low-pass filter into a 32HP format using standard 3.5mm jacks.

Design across the catalog leans toward playful, unconventional circuits that favor happy accidents and pattern exploration over strict traditional synthesis, giving the instruments a distinct acid-adjacent and percussive character that has made them a recurring reference point in the DIY and banana-patch modular communities.

Herbs and Stones has 6 products cataloged on Equipboard, including Synthesizers and Modular Synthesizers.