Kau - Unknown Waveforms [Sdban Ultra]

Unknown Waveforms is the upcoming album from Belgian trio KAU, set for release on October 10, 2025. Marking an evolution from their 2023 work, The Cycle Repeats, this new record captures a more personal, immediate, and unfiltered version of the band's sound. In an increasingly digital world, KAU takes a distinct path, with an album rooted in human connection, live energy, and creative spontaneity. Here, the trio reflects their vision of instrumental music, drawing deeply from jazz, hip hop, and electronic influences.

At the heart of Unknown Waveforms is the starting point of three musicians in a room, writing and composing music in the moment. For KAU, this idea mirrors their working method: long sessions of improvisation, free experimentation, and shared moments of inspiration. Songs often take shape slowly, developing over hours or days, but always collaboratively built as a trio.

The album title reflects the mystery behind how music forms, but it is both literal and symbolic. “Unknown waveforms” are the sounds that emerge when machines and people interact in unpredictable ways. Whether you're a seasoned musician or just starting out, the creative process often feels elusive and difficult to fully grasp. But there are also certain moments: creative sparks that cannot be planned or programmed. In the end, it's more than notes, gear, or structure; it's about the process, the tension, and the energy that arises when people connect and create in the same space.

The album’s title track, Unknown Waveforms, captures precisely that process. It opens with a quote from synthesizer pioneer Wendy Carlos: “I’m just trying to show you how we get some of these sounds,” directly inviting the listener into the creative space. The track focuses less on a polished outcome and more on the moment before a song is “finished”: it's a portrayal of experimentation, sensation, and raw expression.

This commitment to honesty permeates the entire album. KAU kept overdubs to a minimum, avoided excessive editing, and prioritized spontaneous decisions over calculated ones. At a time when the future of live improvised music seems uncertain, the trio leans even more into the physical, the real, and the immediate. The album resists the pristine gloss of modern production, favoring the warmth and imperfection of analog synthesis. The band embraces the character of their instruments, especially vintage gear, where small flaws add beauty, depth, and personality.

One of the stand-out tracks, cr_eye, is driven by the Moog Subphatty, a key instrument in the band's arsenal for its analog warmth and powerful sub-bass. The track revolves around the dialogue between bass and drums, allowing the keyboards to recede and create space. It takes emotional threads from previous KAU tracks like Kampala and Kautokeino, uniting past and present with a shared atmosphere and characteristic rhythmic interplay.

Another highlight, Stratford, finds inspiration in London's transport system and the UK jazz scene that has influenced KAU for years. A field recording snippet from the London Underground opens the track, connecting it to the rhythm of everyday commutes. Built around a hypnotic sequencer line from the Roland JX-3P, the track evokes the movement of a subway journey. Artists like Nubya Garcia, Yussef Dayes, and Alfa Mist, key figures in a scene the band has admired for years, subtly resonate throughout the piece.

Above all, Unknown Waveforms is a statement of intent from KAU: a celebration of imperfection, creative honesty, and a window into the process.