I am going to assume that you are talking about audio to MIDI, thus you will need either hardware or software like the following:

Software:
http://www.widisoft.com/english/widi-audio-to-midi-vst.html
Or this http://audio-to-midi-vst.en.softonic.com/
I do not have any experience with either of this. Also google/bing audio to MIDI and you will find a number of other software programs that do this. The best audio to MIDI program I have come across is Melodyne Editor http://www.celemony.com/cms/index.php?id=editor2

Hardware:
http://www.sweetwater.com/store/detail/T...CFcpDMgodECQAXA
Again google/bing for others just remember good audio to MIDI software and hardware is expensive.


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64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware