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Calculate audio compressor output levels from threshold, ratio, and input level. Visualize gain reduction for mixing and mastering.
Calculate room acoustic modes and standing wave frequencies from room dimensions. Identify problematic bass frequencies for studio treatment.
Calculate RT60 room reverb time using the Sabine equation. Estimate acoustic treatment needed for studio and live room design.
Q determines filter narrowness. High Q = narrow notch or peak. Low Q = broad shelving or gentle peak.
Q = Center frequency (f) ÷ Bandwidth (BW)Bandwidth in Hz at −3 dB points for peaking filters. Q of 2 at 1000 Hz = 500 Hz bandwidth.
BW = f ÷ Q1 octave bandwidth ≈ Q 1.41. 1/3 octave ≈ Q 4.3. 2 octaves ≈ Q 0.71. Useful for translating graphic EQ to parametric.
Q ≈ 1.41 ÷ Octaves (for moderate Q)Updated: July 2026
Room resonance at 80 Hz — set parametric cut: center 80 Hz, Q 4 (20 Hz bandwidth) for surgical 6 dB cut without affecting adjacent frequencies.
Boost at 4 kHz with Q 1.5 (2.67 kHz bandwidth) — broad enough for natural presence without nasal honk.
31-band 1/3-octave graphic EQ slider at 1 kHz ≈ Q 4.3, bandwidth 233 Hz — replicate with parametric EQ settings.
Parametric EQ settings require understanding the relationship between center frequency, Q factor, and bandwidth. Enter any two values to calculate the third, and convert between octave bandwidth, semitones, and Q for precise equalizer adjustment.