7th extensions are the most useful chord color in electronic music; minor-7 and major-9 define the deep-house/dub-techno pad sound

Chord extensions add color tones above the basic triad. The source singles out 7ths as ‘the single most useful extension in electronic music’ and names the types: major-7 (+11, lush/jazzy), dominant-7 (+10, bluesy pull), and minor-7 (+10 on a minor triad, smooth/deep-house). Further color comes from 9th/11th/13th tones, and sus2 (+2)/sus4 (+5) replace the third for an open, unresolved sound useful in non-committal pads. The source states that minor-7 and major-9 chords ‘are the deep-house/dub-techno pad sound,’ making the 7th/9th extension a genre-identifying timbre choice, not merely a theory idea.

Examples

chord('Am7') = A+C+E+G (minor-7). chord('Fmaj9') = F+A+C+E+G (major-9). Both are idiomatic house/dub-techno pad voicings.

Assessment

Identify the 7th extension type for each: (a) lush/jazzy, (b) bluesy pull, (c) smooth/deep-house. Name the interval each adds above the root. Which two extensions define the deep-house pad sound?