Cmaj7. The dreamy, jazzy, sophisticated upgrade to plain old C major. Adds that floating major seventh (B note) for a lush, resolved-yet-open sound - C • E • G • B. Super common in pop, jazz, R&B, indie, classic rock, and singer-songwriter tunes because it brings emotion and color without much extra effort. Beginners love the easy open versions; intermediates dig the movable shapes for smoother changes.
Common ways to play Cmaj7 on guitar:
The easiest and most beautiful - just lift the index finger off the B string from a regular C. Rings clear and full.
Add the pinky on the high e for extra sparkle and a fuller voicing.
Drop the low strings for cleanest changes - great for strumming or quick transitions.
Root on A string.
Root on E string.
These scales live inside or perfectly complement Cmaj7 (same C major notes, but emphasizing the major 7th vibe):
The home scale - play it over Cmaj7 for that resolved, happy-yet-dreamy feel.
e|------------------0-1-3-5-7-8-|
B|--------------1-3-------------|
G|----------0-2-----------------|
D|----0-2-3---------------------|
A|--3---------------------------|
E|------------------------------|Safe, melodic, no clashing notes - perfect for leads or fills over Cmaj7.
e|------------------3-5-8--|
B|--------------3-5--------|
G|----------2-5------------|
D|------2-5----------------|
A|--3-5--------------------|
E|-------------------------|
e|---------------------------0-1-|
B|-----------------------1-3-----|
G|-----------------0-2-4---------|
D|-----------0-2-3---------------|
A|-----0-2-3---------------------|
E|-1-3---------------------------|e|-------------------------0-1-3--| B|-------------------0-1-3--------| G|---------------0-2--------------| D|---------0-2-3------------------| A|---0-2-3------------------------| E|-3------------------------------|
e|------------------------0-1-3-5-|
B|------------------0-1-3---------|
G|--------------0-2---------------|
D|--------0-2-3-------------------|
A|--0-2-3-------------------------|
E|--------------------------------|
e|---------------------5-8-|
B|-----------------5-8-----|
G|-------------5-7---------|
D|---------5-7-------------|
A|-----5-7-----------------|
E|-5-8---------------------|Cmaj7 adds that magical touch to tons of hits. Try swapping plain C for Cmaj7 in I-IV-V progressions (C-F-G) for instant sophistication: