Say it with a duet

We teamed up with adam&eveDDB and Meta to bring Twix Harmoniser to life – a playful WhatsApp feature that turns ordinary voicenotes into delightful duets using AI and custom sound design. From concept to sonic execution, Plan8 handled the full production, helping Twix launch its global platform "Two is more than One" with a uniquely musical twist.

To make Twix Harmoniser sing, we built everything from the ground up. Using high-end audio processing, we transformed WhatsApp voicenotes into rich, layered duets. From custom pitch detection and harmony generation to the full backend infrastructure – servers, APIs, and deployment – every part of the experience was crafted by Plan8. A full-stack sonic journey that turns even the dullest message into music.

Twix Harmoniser took home 4 Cannes Lions – including Silver in Brand Experience & Activation – and 5 shortlists. We’re proud to have led the full audio and tech production for this playful, AI-powered WhatsApp experience. Big thanks to adam&eveDDB, Meta, and the team at Mars for making it twice as good.