radioCREEP vs CreamAudio Analyzer

RADIO CREEP: Audio Signal Analyzer transforms your iPhone into a professional-grade acoustic analysis tool. Built with Apple’s high-performance Accelerate Framework (vDSP), it enables researchers, audio engineers, and students to record audio and instantly generate core signal processing metrics for deep insights into sound dynamics. Key features include: - Real-time recording and analysis: Record up to 90 seconds of audio directly on your device. The app analyzes the recording rapidly upon stopping. - Loudness dynamics (RMS profile): View a detailed plot of the Root Mean Square (RMS) energy over time, showing normalized loudness dynamics and identifying patterns of steady sound (music) versus transient spikes (speech/sports commentary). - Acoustic stability score: Automatically calculates a stability metric based on the variance of the RMS energy, predicting the content type (scores below approx 0.15 indicate steady Music; higher scores suggest dynamic Talk/Sports). - Frequency fingerprint (Average FFT): Instantly compute and plot the Average Fast Fourier Transform (FFT) magnitude spectrum, revealing characteristic frequency components masked.

CreamAudio turns your Mac, iPad, or iPhone plus a class-compliant USB or Thunderbolt audio interface (such as a Focusrite Scarlett 2i2) into a complete professional audio measurement bench. The interface's analog inputs become the front end; its outputs drive the built-in signal generator. Multiple precision instruments share one calibrated signal path: OSCILLOSCOPE • Live two-channel display in normal (Y-t) and XY (Lissajous) modes • Adjustable volts/division and time/division with pinch and scroll zoom • Edge triggering with Auto / Normal / Single modes and single-shot capture • Graticule with division labels and live Vpp, RMS, frequency readouts • Per-channel DC/AC coupling and vertical offset FUNCTION GENERATOR • Sine, square, triangle, sawtooth, white and pink noise • Per-channel frequency, amplitude, offset, phase, and duty cycle • Sweep, chirp, and burst programs • Test Tape: an automated alignment-tape sequence (reference tones 400 Hz to 12.5 kHz, sweep, chirp, burst, flutter tone) to record onto a deck and measure back • Route to the same interface (loopback) or a separate output device SPECTRUM & SPECTROGRAM • Real-time FFT spectrum with selectable size and windowing, log/linear axes • Spectrogram heatmap across the recorded timeline FREQUENCY RESPONSE • Measure response with white / pink / swept stimulus that drives the generator automatically; curves accumulate for easy comparison DISTORTION & LEVEL • Automatic THD, THD+N, and SNR measurement • Vpp, Vrms, mean, frequency, period, and duty-cycle readouts • Built-in analog-style AC millivoltmeter (1 mV to 30 V, dual volt/dB scales) WOW & FLUTTER METER • Speed-stability analysis for turntables, cassette, and reel-to-reel tape • DIN / IEC 386 (3150 Hz) and JIS (3000 Hz) reference tones with auto-detect • WRMS, DIN 2-sigma quasi-peak, and unweighted readings; deviation waveform RECORD, SCRUB & EXPORT • Record the raw two-channel stream and scrub the timeline to find transients • Re-run any analysis offline on a selected window • Save recordings to WAV (lossless) or AAC (.m4a) CALIBRATION • Map normalized samples to real volts with manual entry or a guided reference solve, so every reading is in true voltage units; profiles persist per device Sample rates up to 192 kHz where the interface supports them. Everything runs locally on your device — no account, no network, no data collection. Requires a Metal-capable device. An external audio interface is recommended for real measurement work; the built-in microphone can be used for casual signals. Requires a subscription or one-time purchase. Start with a 3-day free trial, after which a monthly subscription begins automatically and renews each month unless cancelled at least 24 hours before the period ends. Prefer to pay once? Unlock everything with a one-time lifetime purchase — no trial, no subscription. The free trial is available to new subscribers. Subscription and lifetime prices are shown in the app and on this product page. All features described below are included once unlocked; there is no separately-priced content. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/