# Sustainable Hand-Crafted Keyboards This Working Synth is Crafted from Cardboard and Walnut Keys By Amy Duong | Published 2025-11-17 | Lifestyle Source: Trend Hunter, https://www.trendhunter.com/trends/working-synth References: [instructables](https://www.instructables.com/How-to-Build-a-Working-Synth-With-Handmade-Wooden-/)  The cardboard walnut synth demonstrates a handmade approach to instrument building by pairing a cardboard body reinforced with fiberglass and a steam-bent walnut frame with a [fully functional electronic system](https://www.trendhunter.com/trends/phase8). The keyboard features individually cut [wooden keys](https://www.trendhunter.com/trends/skiller-sgk50-s3-wood) mounted on simple pivots, each linked to a flexible printed circuit that sends signals to a microcontroller. A compact computing module processes the inputs through [open-source synthesizer software](https://www.trendhunter.com/trends/synth), allowing the unit to operate as a playable musical device despite its unconventional construction. The layout and proportions follow standard keyboard dimensions so the instrument functions like a traditional tabletop synth. The exterior shell uses shaped cardboard panels and laminated fiberglass to create a rigid housing that supports the keys and electronic components. Walnut detailing forms the perimeter structure and includes patterned cutouts that reference speaker elements. The project highlights how common materials and basic fabrication methods can produce a functional electronic instrument that departs from typical plastic-bodied synthesizers while preserving familiar interaction and sound capability. Image Credit: Gabriel Mejia-Estrella ## Trend Insights (Trend Hunter) - Score: 3.5/10 - Popularity: 20% | Activity: 29% | Freshness: 56% - Audience gender: 50% men, 50% women - Primary generations: Gen Z, Millennial, Gen X - Top markets: North America, South America, Europe, Asia, Africa ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Lifestyle](https://www.trendhunter.com/lifestyle) ## Key Themes ### What Makes This Trend Stand Out - **Eco-friendly Instruments:** The synthesis of sustainability and functionality in building musical instruments from unconventional materials is gaining momentum. - **DIY Synthesizer Movement:** Empowering individuals to craft their own musical instruments, the DIY synthesizer movement is challenging traditional manufacturing processes. - **Open-source Audio Technology:** Open-source software solutions are revolutionizing the audio industry by enabling personalized and flexible synthesis of sound. ### Sectors Adopting This - **Musical Instrument Manufacturing:** This industry is being transformed by incorporating sustainable materials and personalized crafting techniques. - **Sustainable Materials:** The use of eco-friendly materials in product design is reshaping markets traditionally dominated by less sustainable options. - **Open-source Software Development:** Innovation in open-source platforms for various applications, including music synthesis, is disrupting proprietary software models. ## Related on Trend Hunter - [Sober Sauna Experiences](https://www.trendhunter.com/trends/sober-sauna.md) - [Guitar Retail Expansions](https://www.trendhunter.com/trends/gibson-garage-miami.md) - [Creator Streaming Tools](https://www.trendhunter.com/trends/creator-streaming.md) - [Social Music Platforms](https://www.trendhunter.com/trends/meloday.md) - [Music Control Hubs](https://www.trendhunter.com/trends/tuneful.md) - [Comprehensive Musician-Honoring Publications](https://www.trendhunter.com/trends/gibson-publishing.md) - [Gen-Z-Forward Vinyl Collections](https://www.trendhunter.com/trends/singles-day-vinyl-series.md) - [Honorary Mexican-Singer Apparel](https://www.trendhunter.com/trends/chalino-sanchez.md) - [Iconic Cognac Partnerships](https://www.trendhunter.com/trends/hennessy-x-bad-bunny.md)