Version 2.1 adds Field Setup, a measurement-readiness workflow for real audio sessions. New in this build: - Field Setup readiness score for calibration, external mic, quiet baseline, mounting, FFT size, and export planning. - Offline Reference Pack with six bundled 48 kHz WAV test signals for playback-path, room, and spectrum checks. - Profile-specific recommended chains for studio tuning, live-venue checks, noise logs, and vocal range work. - Copyable session brief for notes, reports, or client handoff. - In-app source links and clearer reference-tool limits for phone-based SPL and noise-dose readings. - Safer Noise Log and Hearing Sweep wording to clarify the app is not a certified compliance meter or clinical hearing device. - Fresh App Store screenshots showing the current RTA, SPL, Field Setup, Reference Pack, and tools screens.

This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged; still fully on-device.

Frequency Loom 2.0 — five new pro measurement tools, still 100% offline. • THD / Distortion Meter: plays an internal test tone and reports THD, THD+N, SINAD, and ENOB with a harmonic breakdown and CSV export. • Dynamics / Crest Factor: live peak vs RMS in dB with a session aggregate and a reference rail. • Room Mode Calculator: enter L/W/H and see axial fundamentals, mode pile-ups and gaps, and a ratio-quality score. • Polarity Checker: emits a positive-leading pulse and tells you in-polarity vs inverted. • Delay / Distance Finder: a click plus cross-correlation gives lag, distance, and confidence. All DSP runs on-device with synthetic-signal-verified math. No account, no network — your audio never leaves the device.

Version 1.2 - Multiband RT60 per octave band. New in 1.2: - Multiband RT60: after any impulse capture, tap "View Multiband RT60" to see T20 reverberation time computed independently for each of 7 octave bands (63 Hz through 4 kHz). Uses IIR biquad bandpass filtering + Schroeder backward integration per band - the same method used by Room EQ Wizard and professional acoustic software. Tap any bar to see its full Schroeder decay curve. Results are compared against EBU R 68 / ISO 3382-1 control-room targets with pass/fail indication per band. All previous tools (from 1.1): - Real-time spectrum analyzer with 1/1 through 1/24 octave resolution and NC curve overlay - A / C / Z weighted SPL meter with Slow / Fast / Impulse integration and LEQ - Scrolling spectrogram (magma colormap, adjustable FFT) - Chromatic tuner with YIN pitch detection and cents readout - LUFS loudness metering (momentary / short-term / integrated, ITU-R BS.1770) - RT60 room reverberation (Schroeder integration, T20 method) - Tone generator (sine, log sweep, pink / white / brown noise, impulse) - Standing-wave heatmap - 12 listening positions - Audiogram hearing sweep, Crossover designer, Phantom 48V tester - Hum ID, Time Align, Vocal Warmup, OSHA Dosimeter with CSV export - Room History, Room EQ Advisor with treatment recommendations - PDF export from the RTA screen Real DSP throughout. No tracking. No account. Microphone only.

Frequency Loom 1.1 adds an NC (Noise Criterion) curve overlay on the spectrum analyzer with a live NC rating, PDF export of an octave-band report, a Room Measurement History with trend chart and per-measurement treatment notes, and a Room EQ Advisor (pick a room type for RT60 and NC targets plus ranked treatment recommendations). Real DSP throughout — microphone only, no account, no tracking.