AudioSpectrumWaterfall vs BenchPro Testing

A real-time audio analyzer for iPhone and iPad. Five panes cover spectrum, waterfall, oscilloscope, peak list, and note/chord detection — pick any combination and arrange them in a custom layout. PANES Spectrum — live magnitude spectrum in three drawing styles (Trace, Line, Bars), peak-hold trace, peak markers, and a drag-anywhere cursor showing frequency, level, and nearest note. Waterfall — scrolling spectrogram with six color maps and adjustable scroll speed. Time Domain — oscilloscope with rising-edge trigger, automatic vertical gain, and min/max envelope drawing. Notes & Chords — detected fundamentals with cents-accurate tuning meters and chord name readout. Peak List — top N interpolated spectral peaks with frequency, level, nearest note, and cents offset. Panes stack vertically and split into two columns on wide, short windows (iPad landscape, phone landscape). Five built-in layout presets are included: Spectrum + Waterfall, Scope + Spectrum, Musician, Analyser, and Everything. ANALYSIS CONTROLS FFT size from 256 to 32768 points. Window functions: rectangular, Bartlett, Hann, Hamming, Blackman, Blackman-Harris, flat top, Kaiser. Exponential averaging and adjustable refresh rate. Live readout of frequency resolution (Hz/bin) and window length (ms). Amplitude scale: linear or dBFS, with adjustable level range. Frequency scale: linear or logarithmic, with adjustable frequency range. Spectrum style: Trace (every FFT bin plotted individually, no resampling) or Line/Bars (per-pixel peak or average detector). NOTE AND CHORD DETECTION Harmonic-comb analysis with iterative spectral subtraction identifies fundamental frequencies and matches them against 19 chord templates across all 12 roots, including slash-chord naming. A spectral-flatness gate skips pitch detection on broadband, non-tonal input (percussion, breath, room noise), with an adjustable sensitivity threshold. The spectrum, waterfall, and peak list always display the raw, unmodified spectrum — harmonic reduction is applied only to the note and chord readout. AUDIO INPUT Works with any input source exposed by the system: built-in microphone (including individual top/bottom/front/back elements where supported), wired headsets, USB audio interfaces, and Bluetooth headsets. Sample rate can follow the hardware or be fixed at 8, 16, 22.05, 32, 44.1, 48, or 96 kHz. Automatically handles route changes (headphones unplugged, Bluetooth reconnects) and interruptions (phone calls). SIGNAL GENERATOR Built-in generator produces sine, sawtooth, square, triangle, white noise, pink noise, a logarithmic sweep, or a major triad — useful for testing scale settings and window behavior without external audio. Nothing is routed to the speaker. DISPLAY CONTROLS Freeze the live display at any point, and start or stop capture manually. A status bar shows RMS/peak level with a clipping indicator, the current audio route, sample rate, FFT size, Hz/bin resolution, and window length. PRIVACY Audio is analyzed in real time on-device only. It is never recorded or transmitted. REQUIREMENTS iPhone and iPad, iOS 17.0 or later. Microphone access required for live audio capture. English only.

BenchPro Tester is the companion app used alongside Bench Pro repair shop diagnostic stations. When you bring your phone in for service or a trade-in evaluation, your technician connects it over USB and this app walks through a complete guided hardware check — results are sent straight to the shop's diagnostic report. WHAT IT CHECKS • Screen — dead pixel and display check • Touch screen — full coverage test • Multi-touch — simultaneous finger detection • Front and rear camera • Speaker and earpiece • Top and bottom microphone • Vibration / haptics • Physical buttons • Charging port • Flashlight • Proximity sensor • Wi-Fi and Bluetooth radios • GPS • Gyroscope • Battery health (real load test, not just a snapshot reading) HOW IT WORKS Plug your phone into the shop's diagnostic computer with a USB cable. This app opens automatically and walks you through each test with clear on-screen instructions — tap Pass, Fail, or Skip as you go. No account, no sign-up, no data entry required. No cable handy, or a port that won't connect? The app also supports a hand-tested mode your technician can use directly on the shop computer, so a diagnostic can still be completed without a working USB connection. WHO IT'S FOR This app is intended for use at a participating repair shop running Bench Pro Tech Station — it isn't a general consumer diagnostic tool and has no functionality on its own outside of that pairing. PRIVACY Test results are sent only to the shop's own computer over your temporary USB/local connection — nothing is uploaded to Bench Pro's servers or any third party, and no account or personal information is required to use the app.