Adjustable pickup sensitivity: finetune response to different instruments, pickup types, and playing styles. This prevents signal clipping for strong inputs and ensures clear, consistent pickup signal at varying distances or playing dynamics. Realtime spectrum analysis with LED display: the device captures the signal from the pickup, analyzes its frequency spectrum, and presents the results through LED indicators. This provides immediate visual feedback on tonal balance and spectral content, helping you adjust gain, EQ, or technique on the fly. Integrated module with core components: a compact design that combines the pickup, amplifier, MCU, and LED display into a single assembly. This simplifies installation and reduces the need for separate parts, while maintaining reliable operation across typical instrument setups. Use scenarios Live instrument performance: attach to a guitar, bass, or other pickupequipped instrument to monitor spectrum in real time and make quick tone adjustments during a gig or rehearsal. Home studio or practice room: visualize spectral content while recording or practicing to better understand how playing technique, pickup placement, and gain affect the frequency balance. Educational or workshop demonstrations: demonstrate spectrum analysis and LED visualization concepts in music technology or electronics classes, showing how pickups translate string vibration into measurable frequency content.