mimigarKEEN vs Live Spectrum Analyzer

KEEN is a sound pressure level (SPL) meter specialized for the 18–20 kHz ultrasonic band. It lets you easily check sounds near the upper limit of the audible range — often outside the scope of ordinary sound level meters — using an iPhone and a measurement microphone. FEATURES - Real-time sound pressure level (dB SPL) display for the 18–20 kHz band - Switchable time weighting (Fast 125 ms / Slow 1000 ms) - Supports USB measurement microphones (such as the Dayton Audio iMM-6C) - Automatically applies per-microphone calibration data - Detects the microphone's serial number on connection and fetches its registered calibration data - Also supports entering the identifier printed on the microphone or scanning its QR code - Calibration files can be imported as well - Manual calibration with a pistonphone (94 dB SPL @ 1 kHz) NOTES - For accurate measurement in the 18–20 kHz band, we recommend using a supported external measurement microphone with its calibration data applied (high-frequency sensitivity is not guaranteed with the built-in microphone). - Microphone access permission is required for measurement.

Live Spectrum Analyzer is a real-time audio visualization tool for musicians, students, teachers, sound makers, and anyone who wants to see sound clearly. Use the microphone for live input, or import an audio file from Files to inspect how frequency, amplitude, pitch, and dynamics change over time. Switch between waveform, FFT, sonogram, spectrum bars, VU meter, pitch, octave bands, peak hold, envelope, waterfall, phase, Lissajous, and XY Scope views. Each mode is designed for quick visual reading while you listen, tune, practice, demonstrate acoustics, compare sounds, or check a recording. The app also provides practical analysis readouts, including RMS, peak level, decibels, detected pitch, strongest frequency peaks, spectral centroid, zero crossing rate, dynamic range, estimated BPM, beat strength, mel bands, chroma, noise floor, and clipping status. Results are intended as helpful visual references rather than certified measurement data. Key features: • Live microphone waveform and spectrum visualization • Import audio files for playback and local visual analysis • Waveform, FFT, sonogram, bars, VU, pitch, waterfall, phase, and scope modes • Adjustable gain, time window, FFT floor, sonogram brightness, contrast, and speed • Pitch reference, tolerance, microphone gain, and noise gate settings • Record audio locally, review saved recordings, and share or delete files • Capture visualization snapshots as PNG images • Local-first workflow with no account required Subscription and purchase information: The app offers a free experience and optional Pro access. Actual prices, trials, promotions, and availability are shown in the App Store. Privacy and data information: Your microphone input, imported audio, recordings, snapshots, and analysis results stay on your device by default. The app does not require an account and does not upload your media to a server operated by us. Privacy Policy: https://sites.google.com/view/livespectrumanalyzer/home/privacypolicy Terms of Use: https://sites.google.com/view/livespectrumanalyzer/home/term_of_use Contact: gongchengyong70@gmail.com