AudioEngineerToolkit
dB, delay, phase, RT60, BPM
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$4.99
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About
A complete set of offline calculators for audio engineers — on stage, in the studio, no internet required. No login, no ads, no tracking.
■ Electrical
· Ohm's Law calculator
· Power calculator
· Speaker impedance (series/parallel)
· dB ↔ power ratio converter
■ Delay
· Distance ↔ Time ↔ Phase
· Haas Effect zone finder
· Multi-zone speaker delay alignment
· BPM-based reverb pre-delay
■ Acoustics
· Frequency ↔ Period ↔ Wavelength ↔ Quarter-wavelength
· Octave band calculator
· Distance ↔ time delay
· Room volume calculator
· Room mode calculator
· RT60 reverberation time
■ Tempo & Pitch
· Tap tempo (BPM) finder
· Note length calculator
· Playback speed ↔ pitch converter (turntable-style)
· Loop BPM finder
· Bar duration calculator
· Sample rate / buffer size latency calculator
Keep your go-to calculators in the Favorites tab and open them in one tap.
Available in Korean, English, Japanese, Spanish, Simplified Chinese, German, Brazilian Portuguese and French. Runs on iPhone, iPad and Mac.
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What's New in AudioEngineerToolkit
1.1.2
October 5, 2026
• Now available in German, Brazilian Portuguese and French. • Decimals now work with a comma in regions that use one: you can type them, and results are shown with your decimal separator. • Some result labels and the Quiz tab are now translated.
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