Automatic bass line

[Robert Deluce]

Only 300+. I am 74 years young but find requests for obscure little known songs to be occasionally problematic.  I am a guitar vocalist, not a karaoke artiste.

[Robert Deluce]

Here is a block diag of what I think my thoughts look like:

 

[John Vere]

Backing tracks you made yourself are a far stretch from Karaoke. It is a true one man band. 
Karaoke is a full band and backing vocals and often has no solid beat.  

My tracks are Drums, me playing bass and then some keyboards or horns if needed. 

The bass and drums are tight and mixed to be punchy and get people dancing. I also have to be very together with my guitar playing. My singing and guitar playing are what is upfront. Nobody generally notices that I use tracks. 
The videos may seem like Karaoke but they are really just my digital song book similar to using OnSong. 
Bass is important for dancing. Are you playing at dances? 
If what you’re doing is just coffee house gigs then just play your guitar with a boost on the EQ around 300-400hz. 
 

Don’t get me wrong as I really like your idea and yes all the technology is sort of there but these days the focus is on making music with electronics and it is all synchronized using a laptop, synths and drum machines. 
Keyboards make ideal interfaces because they output digital data but with a guitar you first need to convert the audio to midi data. 
Your drum machine would need to be synchronized to whatever creates the bass.  
 

Edited 17 hours ago by John Vere

[Glenn Stanton]

in theory, you oculd already use VI like Toontrack EZ Bass which has MIDI input from keys (or MIDI guitar) and drums to create accompanyment... also the TT Audio Sender plugin let's you send audio to the EZ Bass Audio Tracker input. combined with a decent library of styles and instruments, this might be worth looking into. i use it to create basslines by creating the song in the standalone app, use the libraries to select what i like foro a given section, then export the MIDI for use in the DAW.

Edited 14 hours ago by Glenn Stanton