Tools

Free, professional-grade audio tools for live sound engineers. No signup, no tracking, works offline.

Ear Training

Two ear training games. Name the boosted frequency band from four candidates, or find a feedback tone by moving faders on a 1/3-octave graphic EQ.

  • 26 ISO 1/3-octave bands, 50 Hz to 16 kHz
  • Selectable frequency range
  • Room effect for realistic feedback tone
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Delay Calculator

Calculate speaker delay times from distance, temperature, and BPM. Supports ms, metres, feet, and samples.

  • Distance to ms and samples
  • BPM to beat/note durations
  • Temperature compensation
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dB Converter

Convert between dBu, dBV, dBFS, and volts. Reference level presets for European broadcast and SMPTE RP 155.

  • dBu, dBV, dBFS, volts
  • European broadcast and SMPTE presets
  • ± toggle for negative values
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Storage Calculator

Calculate audio storage requirements for sample rate, bit depth, and channel count. Estimate recording times for SD cards and SSDs.

  • WAV and MP3 file size estimation
  • Multitrack storage planning
  • SD card and SSD capacity checks
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Limiter Calculator

Calculate limiter settings for loudspeaker protection. Set RMS and peak thresholds from AES power ratings and impedance.

  • RMS and peak limiter thresholds
  • Multi-way sections with crossover HPF
  • AES power rating and impedance inputs
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BPM → ms

Convert BPM to delay and reverb times in milliseconds. Tap tempo for live detection. Reverse-calculate BPM from a known delay time.

  • BPM to ms for whole, half, quarter, dotted and triplet notes
  • Tap tempo detection
  • Reverse ms to BPM
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