Tools

This is an index, not a set of bare calculator pages. Each tool lives inside its article, so the assumptions behind the numbers are on screen next to the inputs. Once an entry is live it links to the article that hosts it.

Core tools

• Published

  dB / Level Converter

  dBFS, dBu, dBV, dBm, dB SPL and linear V rms, all six representations at once.

• Published

  IEEE 754 Float ↔ Hex Converter

  32- and 64-bit bit patterns, with the decoded fields and the rebuild check shown separately.

• Published

  Dither and Quantisation Calculator

  SNR, noise floor and usable bits for any depth, dither type and signal level, with the quantisation step shown in dBFS.

• Published

  Window Function Generator

  Coefficients, time-domain shape and magnitude response for Hann, Hamming, Blackman, Blackman-Harris, Nuttall, Blackman-Nuttall, flat-top and rectangular windows.

• Published

  FFT / RMS / Peak Spectrum Analyser

  Windowed spectrum with peak, interpolated peak, RMS, crest factor, noise floor and noise density — including capture file import.

• Published

  Dual-Channel Coherence Analyser

  Magnitude-squared coherence and cross-spectrum phase with user-set averaging, the significance threshold drawn on the plot, and a delay you can dial in.

• Published

  FIR Filter Coefficient Generator

  Windowed-sinc low-pass, high-pass, band-pass and band-stop coefficient sets with measured transition width, attenuation and group delay.

Extended tools

• Published

  THD / Distortion Analyser

  THD, THD+N, SNR, SINAD and ENOB with a harmonic table, from a generated tone or a capture.

• Published

  Biquad Coefficient Generator

  Eight filter types with Q, bandwidth or shelf slope, plus magnitude, group delay and coefficient output for C, Python or CSV.

• Published

  SPL & Power Calculator

  Level against distance from a sensitivity and a power, with air absorption, cabinet stacking and the power a target level needs.

• Published

  Level Summation Calculator

  Correlated and uncorrelated summation, source stacking, noise-floor subtraction and power averaging.

• Published

  Loudness & True Peak Analyser

  ITU-R BS.1770 integrated loudness with the K-weighting curve, gate levels and EBU Tech 3342 range, plus 4x true peak.

• Published

  Weighting & Leq Calculator

  A, C and Z weighting at any frequency, the level each network reports, and Leq across two segments of different level and duration.

• Published

  Room Mode Calculator

  Rectangular-room mode frequencies by type, coincidence analysis, the Schroeder frequency and modal density.

• Published

  RT60 Reverberation Calculator

  Sabine and Eyring side by side, mean free path, the absorption a target RT60 needs, and the resulting Schroeder frequency.

• Published

  SBIR / Boundary Interference Calculator

  Front and side wall path difference, the first null and first peak each produces, and the comb that follows.

• Published

  Loudspeaker Impedance Calculator

  Reflection coefficient, SWR, return loss, delivered power and the DCR tolerance band, for a load of any magnitude and phase.

• Published

  Speaker Cable Calculator

  Loop resistance from run length and conductor area, the equivalent AWG, damping factor with and without the cable, and the loss in dB.

• Published

  Closed-Box Alignment Calculator

  Box volume for a target Qtc, with Fc, f3, the peak at resonance and the volume as a fraction of Vas.

• Published

  Passive Crossover Calculator

  Component values for any order and alignment, with the measured response and the shift a complex load causes.

• Published

  Subwoofer Alignment Calculator

  Distance, delay and polarity for a subwoofer and main speaker, with the summed response and what the geometry alone leaves behind.

• Published

  Band-pass Level Calculator

  The passband peak of a channel with a high-pass and a low-pass in series, each filter's contribution, and the headroom a correction costs.

Music production

Tempo, pitch and delivery level, in the units musicians actually use. The three are collected on the music calculators page.

• Published

  BPM to ms Calculator

  Every note value, dotted and triplet, with reverse lookup and tap tempo.

• Published

  Cents & Tuning Calculator

  How far off a pitch is in cents, and what your tuning reference means.

• Published

  LUFS Normalisation Calculator

  The gain that hits a delivery target, and whether the true peak survives it.

Supporting tools

• Published

  CRC Calculator

  CRC-8, CRC-16 and CRC-32 with the standard parameter sets, custom poly/init/refin/refout, and both wire byte orders.

• Published

  Nyquist Sampling Calculator

  Alias folding, samples per cycle, oversampling gain in dB and bits, and jitter-limited SNR.

• Published

  Acoustic Time-Distance Calculator

  Distance, time and samples against air temperature and humidity, with wavelength readouts.

• Published

  Audio File Size Calculator

  Uncompressed size for any rate, bit depth, channel count and duration, with per-minute and per-hour rates and hours per gigabyte.