AcoustaLab vs Live Spectrum Analyzer

AcoustaLab is a local signal generator and audio-checking toolkit for speakers, headphones and audio equipment. Quick Checks & Archives: • Rattle Finder: mark a candidate frequency during a slow sweep, fine-tune it, confirm it by listening to a steady tone and narrow the search range. • Retained spectra: capture microphone spectra, keep the last result after stopping, and save snapshots with time and capture conditions. • A/B comparison: overlay two saved spectra on a shared scale, inspect per-band differences and optionally remove the overall level difference. Warnings identify changes in input, output, gain and other recorded conditions. • Test archives: organize spectra, listening findings and guided checks into device or room projects. Rename records, add notes, move them between projects and export CSV. Signal and test tools: • Single tones with sine, square, triangle and sawtooth waveforms, logarithmic frequency control and fine adjustment. • Linear, logarithmic and stepped sweeps, with single, counted or continuous repeat modes. • White, pink and brown noise with filter controls. • Stereo, left-only and right-only routing. • Guided listening checks for reference tones, sweeps, noise, channels and low frequencies, with local history and share cards. • Save, import and export presets. External loopback calibration supports PDF, CSV and PNG reports. • Input, output and sample-rate information to help verify your audio path. Measurement notes: spectrum levels are relative digital dBFS. They include microphone, placement and room effects and are not calibrated acoustic dB SPL or an isolated device response. Keep input, volume and placement consistent when comparing. Rattle findings are confirmed by the user, not automatic fault diagnoses. Phone speakers have limited low- and high-frequency performance. External loopback calibration requires suitable equipment and cables. Signal generation, microphone analysis, presets, history and archives are processed and stored locally. Raw microphone recordings are not uploaded; spectrum snapshots do not contain raw recordings. Files leave the app only when you choose to export or share them. No advertising, user tracking or account registration. Includes 3 days of starter access. After starter access ends, Monthly Pro, Yearly Pro or a one-time Lifetime Unlock provides continued access to core testing features. The purchase screen includes localized pricing, Restore Purchases, Privacy Policy and Terms of Use. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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