The newest innovation in guitars for sometime is the Digital Guitar.

 

A Digital Guitar is connected to a computer with a USB cable and then controlled by software.

 

 

 

Guitar tuner

Digital Guitar Tuner is a free Windows software, which let's you accurately tune your guitar using direct input or microphone. Version 2.3, featuring 27 tuning types, is available for downloading.

Features:

• High accuracy (uses 16 bit / 44100 Hz input!)
• You can tune guitars with no signal output (through microphone)
• 27 different tuning types (standard, lowered, dropped, open tunings, Hawaiian etc.)
• Modulation of root frequency
• Tuning with midi tones
• Nice and simple environment
• it's free!

You can download the full version by clicking the DOWNLOAD button.