Treble Raises $18M to Expand Audio and Voice Development Platform for Physical AI

Frumtak Ventures continues its backing of the Reykjavík-based acoustic simulation company as it expands into the US market.

Reykjavík, 17 September 2026 – Frumtak Ventures is pleased to share that portfolio company Treble Technologies has raised $18 million (approximately €15 million) in a Series A-2 round. The round was led by Paladin Capital Group, with participation from Frumtak Ventures and fellow existing investors KOMPAS VC and the European Innovation Council (EIC) Fund. The financing brings Treble's total funding to €36 million.

Founded in Reykjavík by acoustic engineers Finnur Pind and Jesper Pedersen, Treble has built a cloud-based platform for high-accuracy sound simulation, acoustic digital twins and synthetic audio data generation. The new capital will support the company's growth in the United States and its expansion into physical AI, where its simulation technology helps device manufacturers and AI developers train, test and improve products across a virtually unlimited range of real-world acoustic conditions.

Why sound matters for physical AI

Physical AI – intelligent systems that perceive, understand and act in the physical world – has so far focused mainly on vision and touch. But as voice interfaces and audio intelligence become standard in everything from wearables and head-worn devices to humanoid robots and autonomous vehicles, these products need to hear and interpret sound reliably. That means coping with background noise, reverberation, varied room configurations and differences in microphone placement, often while the device itself is moving through the environment.

This is where Treble's technology comes in. By recreating how sound physically moves through space, the platform lets developers build digital acoustic versions of rooms, vehicles, materials and devices, and evaluate how a product or AI model will perform before building physical prototypes or launching large-scale recording programmes. Teams can generate consistent, labelled datasets, test edge cases that are difficult to reproduce in the real world, and compare product configurations under controlled conditions. The result is that prototype testing and data collection can shrink from months to days, while audio AI models become more robust.

Trusted by industry leaders

Treble already works with some of the world's leading developers of voice-enabled devices, including Amazon and Logitech.

"In many stages of developing Alexa as an AI assistant, we rely on virtual acoustic environments to accelerate product design and model development," said Wontak Kim, Senior Audio Research Manager at Amazon. "Treble provides an accurate and scalable way to model those environments. Its platform and expertise have made Treble a trusted partner and a valuable extension of our team."

Andy Harper, Head of Audio AI and Signal Processing at Logitech, added: "Treble allows us to accurately simulate complex acoustic environments that are difficult to reproduce or test at scale in the real world. Crucially, the fidelity of the underlying physics gives us confidence in those simulations, enabling stronger engineering conclusions and ultimately better-performing products."

A differentiated approach to acoustic intelligence

"Audio and voice interaction is becoming a fundamental interface for the next generation of intelligent products, but the physical world is acoustically complex," said Finnur Pind, co-founder and CEO of Treble. "AI models and devices that perform well in a laboratory can struggle when they encounter reverberation, background noise or an unfamiliar physical environment. Treble gives development teams a faster and more scalable way to model those conditions, generate the data they need, and test products to ensure they work reliably in the environments where machines operate and people interact with them."

François Ruether, Vice President at Paladin Capital Group, said: "Today's robots are largely limited to visual perception. They may detect what is in front of them but cannot interpret critical sounds, such as someone falling in another room or a crash around a corner. The Treble team has developed a simulation platform designed to help physical AI models and robots integrate visual and auditory inputs. This multimodal capability will be essential to making robots more useful, productive and safe in human environments."

Icelandic deep tech on a global stage

"Treble is a great example of what Icelandic deep tech can achieve on a global stage," said Ásthildur Otharsdóttir, General Partner at Frumtak Ventures. "Finnur, Jesper and the team have combined rigorous physics with a clear commercial vision, and as physical AI moves into homes, workplaces and streets, the ability to hear and understand sound will be essential. We are proud to continue supporting Treble alongside Paladin, KOMPAS VC and the EIC Fund."

Treble is a strong example of the kind of company Frumtak looks to back: deep technical expertise rooted in Iceland, applied to a global problem with a rapidly growing market. From its origins in architectural acoustics, the company has broadened its platform to serve product manufacturers and AI developers, and is now positioned at the intersection of two of the most significant trends in technology today – physical AI and voice as a primary interface between people and machines.

We congratulate Finnur, Jesper and the entire Treble team, and look forward to supporting the company's next chapter.

For more information about Treble, visit www.treble.tech.