Turn your computer into an advanced reference quality instrument tuner. Here are some features:

• Use your computer as an advanced instrument tuner.
  
• Works with almost any instrument.
  
• Short response time!
  
• Range: 9 octaves: C1 to C10 (for sine waves - may be smaller for complex sounds).
  
• Precision: Better than 0.1 Hz up to ~C8.
  
• Supports more than 30 different temperaments and scales; including historic tunings such as pythagorean, meantone, just, and well tempered tunings, traditional folk scales, stretched piano tunings, and of course also the modern equal temperament tuning.
  
• You can select the root key for all tunings as well as add octave stretching if you want!
  
• You can add your own custom scales and temperaments!
  
• Automatic or manual note selection modes.
  
• Reference tone option.
  
• 'Beat tone' option - tune without looking at the computer screen!
  
• Easily readable tuning meter.
  
• Full screen mode option.
  
• 'Report' feature - create a table of measurement values (useful for instrument makers).
  
• 'Power button' makes it easier to share the 'audio input' with other apps.
  
• 'Power save' mode conserves battery power on portables.
  
• Optional real-time spectrum analyzer graph.
  
• Note hold time control - good for instruments that produce very short tones.
  
• Optional calibration of input noise level, microphone type and low frequency filtering.
  
• Use the internal clock or calibrate the pitch to an external reference source.
  
• Tuning report creation option - useful for instrument makers.
  
• Optional MIDI input: Selecting notes from a keyboard (in 'manual mode').
  
• Optional MIDI output: Send the detected note to a synth.