AKoff Guitar Assistant can assist in visually tuning your guitar with a microphone or an electric guitar connected to your PC's sound card. It analyzes in real time a stream of audio signals from the WAV input of your sound card and then calculates the main frequency. This frequency is shown by a pointer on the graphic guitar signature stamp (frets), comparing it to the proper frequency. Tuning a string now simply means centering the pointer on the appropriate graphic fret.