Thank you to ToneGym for sponsoring this video. If you want to improve your ear training then head to. You can check out my original music over on Spotify:. Upper chord extensions are notes we add to a chord which extend beyond the octave, so for example, 9ths, 11ths and 13ths. Chords like these can frequently appear somewhat intimidating if you've not been presented to them as they come with an entire range of…