RYUN Engineering & Research
Blog & Engineering Notes
Things we built, measured, or got wrong. Written by the developer, dated, and updated in place when code or benchmarks change.
Articles (1)
#ADHD·8 min
Brain.fm and Endel Alternatives: Free Procedural Soundscapes for Focus Without a Subscription
Tired of paying $60 to $90 a year for background study audio? Discover how procedural acoustic masking and the Web Audio API provide non-repeating focus soundscapes with zero logins, zero trackers, and zero paywalls.
Oct 28, 2026Read