CloudSeed

CloudSeed is an algorithmic reverb plugin designed for creating huge, endless spaces and modulated echoes. Originally developed as an open-source project by Valdemar Erlingsson, it has since been refined into a commercial product by Ghost Note Audio with an improved user interface while keeping the core algorithm available on GitHub. The reverb engine draws inspiration from classic 1980s studio units like the Lexicon 224, focusing on lush, atmospheric textures rather than realistic room simulation.

Special Effects Reverb

CloudSeed is not a general-purpose reverb for adding subtle room ambience. It excels at transforming simple inputs into rich, evolving pads and atmospheric washes. Feed it a single note or chord and it blooms into massive, shimmering textures. The modulated delay networks create movement and depth that standard reverbs cannot match. This makes it particularly suited to ambient music, sound design, and any production where you want reverb to become an instrument rather than just an effect.

Algorithm and Sound

The algorithm builds on the principles of classic digital reverbs but pushes toward more extreme, spacious results. Decay times extend into territory where reverb becomes drone. The modulation section adds pitch variation and movement to the tails, preventing static or metallic-sounding results. High and low frequency damping controls let you shape how the reverb evolves over time, from bright and shimmering to dark and murky.

Open Source Heritage

The original CloudSeed was released as open-source software, and the core algorithm remains available on GitHub. This has spawned several forks and adaptations, including CloudReverb by Xunil-Cloud which brought Mac and Linux support to the free version. Ghost Note Audio's commercial release adds a redesigned interface and expanded platform support while respecting the open-source origins.

Platform Support

The Ghost Note Audio version supports VST on Windows and macOS, plus Audio Unit on macOS. It runs on Windows 10/11 and macOS 10.15 or later, with native Apple Silicon support for M1 and later Macs. The plugin requires a 64-bit processor with AVX support, which includes Intel and AMD processors from 2013 onward.

Who Is This For?

• Ambient and drone producers who want reverb that creates evolving, infinite spaces
• Sound designers looking for atmospheric textures and pad-like transformations
• Electronic musicians who use reverb as a creative instrument rather than just spatial positioning
• Budget-conscious producers who want to try the free open-source version before purchasing
• Developers and tinkerers interested in exploring or adapting the open-source algorithm

At £35 from Ghost Note Audio, CloudSeed offers excellent value for a reverb with genuine character. The free open-source versions remain available for those who want to explore before committing, though the commercial version provides a significantly improved user experience.