Octaves

Octaves by AudioThing is a passive bandpass filter plugin created with composer Hainbach. It recreates the rare Brüel & Kjaer 1613, a vintage laboratory tool that splits audio into octave bands using massive metal coils. The result is a unique spectral filter that lets you isolate and emphasize specific frequency ranges with a character you won’t find in standard synthesizer filters. Use it for avant-garde sound design, lo-fi textures, or to add a retro-scientific edge to your tracks. Its stepped octave bands make it perfect for pinging techniques—short bursts that turn the filter into a colorful percussion source. Whether you’re crafting experimental electronic music, ambient soundscapes, or looking to break down audio like the BBC Radiophonic Workshop, Octaves delivers that timeless, hardware-inspired sound. Ideal for producers and sound designers seeking distinctive, characterful filtering.