TELESCOPE

Integrated, short-term and momentary LUFS, LRA and true peak — also per channel. Against ITU-R BS.1770 gating, EBU Tech 3342 for LRA and the literal FIR table of BS.1770 Annex 2 for true peak.

How much headroom is left: PSR over the last 3 s, PLR since reset (AES TD1004), a 61-bin short-term histogram and clip events on a 10-minute timeline.

FFT from 1 024 to 32 768 points with Hann, Blackman-Harris or Kaiser, and free, ⅓-octave (ISO 266) or Bark bands — every bin in dBFS referred to a full-scale sine, with an exact coherent-gain correction.

Level over time: 512 log rows from 20 Hz to 20 kHz, 10 / 30 / 60 s of history and level as colour — the instantaneous power, never an average.

The same data in depth: level as height, time receding from now. A 2.5D oblique projection drawn in software — no GPU — with an occlusion proven identical to the painter's algorithm.

The spectrum by note: constant-Q at 24 bins per octave from A0, a chromagram and a key estimated against the Krumhansl & Kessler profiles — never shown without its confidence and its share of time.

The same constant-Q coiled, one turn per octave: equal notes line up on one radius, so the octave structure of what is playing reads at a glance.

Correlation, width, balance and mono loss over 100 / 300 / 1000 ms, as Lissajous, POLAR SAMPLE or POLAR LEVEL: a half-circle with one ray per degree, where what is out of phase folds onto the base and prints its percentage.

SCOPE's figures per ⅓-octave band, so mono bass and open highs stop averaging into one number. Its band-wide figure, computed from the STFT bins, matches the time-domain meter to 0.00076 in correlation.

The sonogram with phase as colour — red out of phase, green wide, white mono — and level as brightness. A cell with no energy is black, not dim red.

Energy by pan direction × frequency on a 64 × 96 grid, with decay and a trail, in a 2.5D view. The label under its axis cannot be switched off: energy by pan direction · not localisation.

Your mix against a reference track you load, each normalised by its own integrated LUFS: tilt at equal loudness, so the delta sums to zero — checked band by band to 0.006 dB.

21 deterministic rules over a per-second history: within range, how it will feel, where it translates, and what to check and where — every line with its number and its rule. Measurement, not taste.

It reads L and R, pushes them to a lock-free bus and writes nothing back: 0 samples of latency, 0 tail. Deterministic noise through all 13 lenses, with bypass on and off, in blocks of 1 / 7 / 64 / 4096 samples and from a mono source — 0 mismatches.

The literal 4 × 12 polyphase FIR of BS.1770 Annex 2, and a K-weighting recalculated per sample rate, checked against the published 48 kHz table to 8.9·10⁻¹⁶. The known 4× under-read is written down, not rounded away: EBU test 3341-17 reads −6.3160 dBTP against a real −6.0.

Drop a track and it is measured offline with the same classes: integrated, LRA, true peak, the 30 measured ⅓-octave bands and the per-second history come out equal to the bit. 60 s of audio in 0.24–0.63 s on an M4.

FIELD and POLAR LEVEL show energy by pan direction: no HRTF, no ITD, no azimuth. Recovering where a sound was from a finished stereo mix has no unique solution, and TELESCOPE does not pretend it has one.

VERDICT is a threshold table with the source of every number — no model, no network, no telemetry: the same signal gives the same report, word for word. Its per-device checks are generic, with no speaker curve inside. No findings is not the same as finished.

Every lens is timed against 4 ms median / 8 ms p95 at size L — 6 / 12 ms at Retina scale — and published with the load factor k of the machine that measured it: k 0.92–1.05 on the house M4.