Frequency Loom — Audio measurement bench

Features

What it does

Real-time spectrum analyzer with octave-band views and NC overlay

SPL-style level views with A, C, and Z weighting plus Slow, Fast, and Impulse response

Field Setup readiness score with source links and measurement limits

Scrolling spectrogram for seeing frequency over time

Chromatic tuner with reference pitch controls

LUFS loudness views for podcast, streaming, and broadcast checks

RT60 reverberation workflow with multiband RT60

Tone generator with sine, sweep, noise, and impulse modes

Standing-wave heat-map workflow for low-frequency room issues

Crossover, mains hum, speaker time-align, polarity, delay, and vocal warmup tools

Noise-dose reference log with CSV export and in-app source notes

Offline reference signals with built-in playback and usage notes

It brings practical sound inspection tools into one focused iPhone and iPad app: spectrum analysis, level monitoring, tone generation, tuning, loudness, reverberation, room checks, and reference workflows for common audio problems.

Version 2.1 adds Field Setup, a measurement-readiness workflow that helps users document calibration, input path, quiet baseline, mounting, FFT size, and export plan before a session. It recommends a tool chain for studio tuning, live-venue checks, noise logs, and vocal range work, then creates a copyable session brief for notes or client reports.

It also adds an Offline Reference Pack with bundled 48 kHz WAV test signals: white noise, pink noise, brown noise, speech-band noise, low-end room noise, and a 20 Hz to 20 kHz log sweep. These signals help check playback paths, room behavior, rattles, spectrum response, and field setup without relying on connectivity.

Core tools:

Privacy

Private by design

Frequency Loom does not require an account and does not include third-party advertising or analytics SDKs. Content you create stays in the app on your device unless you explicitly export or share it. See the privacy policy.