Dominant 7th chords are the most exciting and colorful chords in jazz. The fundamental voicings are used in all jazz standards, and altered extensions provide endless varieties to get creative.
When I started my study into jazz harmony I learned just how important the modes of the major scale are. It's a bit of a deep topic, and in this post I'll demystify it for you.
The overtone series is the physics behind all western music, including jazz. It is the bedrock of everything we do as jazz musicians.