Media
Level a mixed meeting recording, reduce low rumble and keyboard-like clicks, and produce a meeting-ready audio file.
audio-meeting-recording-normalizerMedia
Clarify listening audio with low-frequency cleanup, speech-presence EQ, conservative denoising, and level protection.
audio-assistive-listening-enhancerMedia
Mix an audio-description narration into program audio while ducking the program when narration is present.
audio-audio-description-duckingMedia
Shift SRT or WebVTT captions to a likely speech onset or by a manual offset.
audio-caption-timing-shifterMath & Numbers
Calculate the overall efficiency of a multi-stage transmission. η_total = η₁·η₂·…·ηₙ. Enter one stage efficiency per line (decimal, e.g. 0.98). Optionally add an input power to get the total loss and per-stage output power.
power-transmission-efficiencyMath & Numbers
Calculate the critical (resonance) speed of a rotating shaft using the single-DOF rotor model. ω_n = √(k/m), n_cr = (60/2π)·√(k/m) rpm. Also returns the natural frequency f_n in Hz.
shaft-critical-speedMedia
Compare SRT or WebVTT cue timing with likely speech activity and flag timing drift.
audio-caption-sync-checkerMedia
Find likely simultaneous speech-like activity by detecting multiple balanced voice-frequency bands.
audio-overlap-speech-detectorMath & Numbers
Calculate the power transmitted by a rotating shaft. P = T·ω = 2π·n·T/60. Solve power from torque and speed, or torque from power and speed. Supports W/kW/hp.
shaft-power-calculatorMath & Numbers
Calculate the elastic potential energy and force of a spring in compression or extension. U = ½·k·x², F = k·x. Solve energy from displacement, or displacement from energy.
spring-compression-energyMath & Numbers
Calculate the stiffness (spring rate) of a cylindrical helical compression/extension spring. k = G·d⁴ / (8·D³·n) in N/mm. Includes shear-modulus presets for common spring materials.
spring-rate-calculatorMedia
Split a long sermon or lecture at reliable silences and optional timestamped topic, applause, or music hints.
audio-sermon-lecture-splitter