Drones are a really useful tool for helping you learn how to improvise. They allow you to hear the quality of a variety of scales over a drone, so you learn how each note sounds in relation to a root note - the drone.
Here we present for your delectation some trippy drone tracks for you to practise with. We've covered all the notes of A major. This means there are drones for each of the notes of the A major scale - A B C# D E F# and G#.
Each track contains just the drone note - there are no chords. So for example the C# track just contains the notes C# at various octaves and set to a beat. This means you can play absolutely any scale or chord that contains the note C#. For all you modal thinkers out there (and you should come for some lessons to see how you're making things hard for yourself!) this means you could play C# Lydian, C# Dorian or any other scale that contains C# - so yes even F# Lydian b7 or G Lydian b7. For Express Guitar students just do your usual thing connecting shapes all over the neck, any way you like as long as there's a C# in there somewhere.
So, here are the drones: