Chord Voicings
Quartal voicings
Quartal voicings are built using perfect 4ths.
When starting out, learn the 2+3 voicing where the lower 4 notes should be perfect 4ths apart and the 5th note a major third higher:

Chord voicings by chord type
Based on mDecks video: https://piped.oracle.steamr.com/watch?v=oLfkz93rMgY
Voicing 1 - 7b9
Use a triad upper structure.
For example, with a Ab7b9 chord, we can use a F major triad as the upper structure to get a 13th chord like so:

Voicing 2 - 7#9
Fmaj7b5 over Db7#9.
Altered sound with the #9 and b13. The top is just a rootless voicing of G7 which is a tritone substitution of Db7. We can use the 3rd of the chord as the lower note of the right hand, which we can call it as a Fmaj7b5.

Voicing 3 - 7#11
Bbmaj7#5 over C7#11.

Voicing 4 - Major7
Am7 over Fmaj7

Voicing 5 - 7#11
C-augmented over Bb7#11. Left hand is playing root and guide tones and right hand is playing an augmented on the second degree of the dominant chord.

Voicing 6 - 7#11
Play the major triad over the second degree of the dominant chord.
B over A7#11

Voicing 7 - Half diminished
Major triad over half diminished chords sounds good. This turns the 9 into a natural 9.
D triad over Em7b5.

Voicing 8 - 7b5
Augmented triad of the b7 of the chord. The left hand plays the b5 triad in closed position.
Db-augmented over a Eb7b5

Voicing 9 - Minor6
Minor 6 chords are inversions of the minor 7b5 chord. They use the same notes.
Asus2 chord (the substitute chord on the 5th of the minor 6th chord) over a B diminished chord (diminished chord of the minor 6th chord)

Voicing 10 - Major7
Esus4 over Amaj7.
If you play 2 perfect fifths one half step above each other between, you get a nice sounding voicing. Leveraging on this fact, we'll play the two perfect fifths on the right hand as a sus4 chord.

Voicing 11 - Major7#11
Gsus4 over AbMaj7#11 (ie. lydian).

Voicing 12 - Major7#11
Play the major7 of the 5th of the maj7#11 chord, without the 5th. This makes the cluster stand out even more by making the upper voice more isolated.
Create an inner cluster with the #11 on the left hand.
F#maj7 over a Bmaj7#11.
