I don't know what software it is but it be pretty easy to make it.
The barcode in text format could be *grnday1* of course thats just stupid so it be *2342* as a barcode
when a barcode is scanned using a PC it scans text or numbers and sends a carriage return.
So say you wanna play Green Day american Idiot and the code is 4332
The barcode would be 4332.
To do this all u need is to make a program where when 4332 is typed in and enter is jhit it plays that mp3
when you scan it the scanner with send 4332 and hit enter for you.
Pretty simple
I hope you understand this lol
Best barcode format to use is code 3 of 9 (used in retail alot) i can send a windows font if you want so u can print labels if you are gonna make this.
I use barcodes for alot of things i made a time card clock at work where the person scans there plastic ID crd which records there name and time so when payroll comes gets the csv file it gives them the info on when they came to work and when they left.
And we use it in our warehouse for stock sheets there is alot of stuff i've done with it.
But i'll shut up now
Hope this is understandable lol