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Calculate EQ center frequency, bandwidth, and Q factor for parametric equalizer settings. Octave and semitone spacing for mixing.
Calculate delay time in milliseconds from BPM for rhythmic delay effects. Quarter, eighth, dotted, and triplet note delay values.
Calculate RT60 room reverb time using the Sabine equation. Estimate acoustic treatment needed for studio and live room design.
When input exceeds threshold, excess level is reduced by ratio. 4:1 ratio means 4 dB input above threshold produces 1 dB output above threshold.
GR = (Input − Threshold) × (1 − 1/Ratio)Below threshold, output equals input (no compression). Above threshold, output increases at 1/ratio of the rate input increases.
Output = Input − GR (when Input > Threshold)Apply makeup gain to restore perceived loudness after compression. Typical: match peak or RMS level to uncompressed signal.
Output_final = Output + Makeup gainUpdated: July 2026
Input peaks 10 dB above −20 dBFS threshold → 7.5 dB gain reduction. Peaks compressed from +10 to +2.5 dB relative to threshold.
Light 2:1 on drum bus with −10 dB threshold tames transients without audible pumping — 3 dB GR on loudest hits.
Effectively brick-wall above threshold. Input 5 dB over threshold with 20:1 → 4.75 dB GR, output only 0.25 dB above threshold.
Audio compressors reduce dynamic range by attenuating signals above a threshold. Enter input level, threshold, ratio, and knee settings to calculate output level, gain reduction in dB, and effective compression for mixing decisions.