The AP Instrument Tuner AP Instrument Tuner is the the cousin of AP Guitar Tuner. It is faster and more accurate than any other PC or hand-held tuner in the market because of API's new pitch recognition technology. AP Instrument Tuner also reliably detects the octave of notes, eliminating the octave confusion present in other tuners. Faster and More Accurate As used in a Windows® environment AP Instrument Tuner can detect and display the pitch within 50 milliseconds and updates the pitch 20 times per second for a smooth and fluid response. AP Instrument Tuner resolves pitches to within one percent of a half step without sacrificing speed. Support for Different Keys AP Instrument tuner contains all the funtionality needed to represent concert pitches in the key of the instrument. Selecting the key of the instrument, enables Instrument Tuner to show the note being playing in the key of that instrument, regardless of its concert pitch. System Requirements Windows 95 or 98 Pentium 100 MHz processor or better 16 MB of RAM 16 bit sound card or better Speakers optional but useful For guitars with a pick up: 1/4" to 1/8" adapter. For guitars without a pick up: Any microphone that can be connected to the sound card.