Joe check very carefully on these. I did a search and found and it showed the Behringer model has no MIDI I/O, thus it is not an audio to MIDI converter. I could not find any information on the Promotions unit but I suspect it to be the same.

Google/Bing audio to midi converter software and you will find a number of them. Some are free so you can try them if you want. Be sure to check if they are mono or polyphonic. I have tried a couple of free ones and they worked somewhat, I had to do a lot of MIDI editing, but that was quite a while ago.

The absolute best polyphonic audio to MIDI converter I have found is in Melodyne Editor, however it is quite expensive. I have done a number guitar and bass audio to MIDI conversions with no editing what so ever. I have found that this software does a better job than my old Casio strat MIDI guitar!

The other options are either a MIDI guitar controller or a guitar with a MIDI controller built in. Fishman http://www.sweetwater.com/store/detail/TriplePlayPU/
has what is supposed to be a good MIDI guitar controller but again it is quite expensive.

I hope this helps.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

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