SiC Tuner — A browser-based reference tone generator for musicians and audio engineers. Select any note across octaves 0–7 on the interactive keyboard and play a clean sine-tone reference through your speakers. Set the A4 reference pitch to standard 415, 432, 440, or 442 Hz — or dial in any custom frequency — and fine-tune microtonally with a ±50 cents slider. The live LED display shows the exact note, octave, and resulting frequency in Hz. Fully self-contained, no install required.