Keith Bromley Chord Book - Fourths Tuning
tl;dr
There is a fantastic free PDF by Keith Bromley that contains chord voicings specifically for all-fourths tuning. If you play in fourths tuning and want a comprehensive chord reference, go download it now:
About the Book
I stumbled across this PDF while searching for fourths tuning chord resources. Keith Bromley put together a thorough collection of chord voicings adapted for P4 (all-fourths) tuning. It covers everything from basic triads to extended jazz voicings, all laid out clearly with chord diagrams.
One of the most common misconceptions about fourths tuning is that you lose access to many chord voicings. While it is true that standard tuning shapes do not transfer directly, the reality is that fourths tuning opens up its own set of voicings, many of which are more logical and consistent than their standard tuning counterparts. Keith's book does a great job of demonstrating this.
Chords in Fourths Tuning
The beauty of all-fourths tuning is the symmetry. Every chord shape is moveable across all string groups without modification. Once you learn a voicing on one set of strings, you can use that same shape anywhere. This is something that guitarists like Tom Quayle and Alex Hutchings have talked about extensively. They have shown that fourths tuning is not limiting at all when it comes to chordal playing. In fact, the consistency can make it easier to voice-lead between chords once you internalize the shapes.
If you are new to fourths tuning, I highly recommend grabbing this PDF and working through the voicings. It is one of the best free resources available and a great complement to the chord tools here on Fourths Hub.