BakTrak the Ultimate MP3 and WAV Backing Track Pedal - 'Matt the Riff Master' Review - YouTube
What is a simple synth that you could plug into a guitar amp that could create backing track drones while you play along? Instead of having to use one of these pedals :
BakTrak
Idoru P-1
How to use a looper pedal for playback of backing tracks - menga.net
Backtrack - Radial Engineering
Monoprice LP3 Looper Guitar Pedal - 3 Tracks and 90 Minutes of Recording Time, Unlimited Overdubs, True Bypass Design - Stage Right Series - Walmart.com
Amazon.com: Positive Grid Spark Control Wireless Guitar Footswitch Pedal/Controller for Spark Guitar Amplifier and Mobile App with Backing Tracks : Musical Instruments
BakTrak Backing Track Player - Contact Page - BakTrak