Inspect the chord as separate notes
Hold the chord and pick each intended string slowly. Identify whether a problem note is muted, buzzing, or simply not being struck. These are different problems. A muted string often touches the side of a neighboring finger. Buzzing may come from a finger placed too far behind the fret or from insufficient clean contact. Avoid squeezing the whole hand harder before you know which string needs attention. Excess pressure can make changes tiring without fixing the actual contact problem.
Diagnose the open G string in C major
Play C as x32010 in standard tuning, from low E to high E. The intended sounding notes, beginning on the A string, are C, E, G, C, and E. Pick those five strings separately. If the open G is dull, inspect the finger fretting E on the neighboring D string: its side may be touching G. Lift that finger momentarily and pick G again. If G rings when the finger lifts, you have isolated a contact issue instead of guessing that the entire chord needs more pressure.
Replace the finger with a slightly more upright fingertip and retest both D and G. Change its angle or position a little at a time, staying close behind the intended fret without sitting on the metal. Then check the B and high E strings; improving one contact can accidentally block another. Finally strum from the A string downward. The omitted low E is intentional in this voicing, so do not count silence on that string as a fault.
Change one variable at a time
Move the relevant fingertip slightly closer to the fret while keeping it behind the metal rather than directly on top. Adjust the finger angle so that nearby open strings have room to vibrate. Let the thumb support the hand without clamping aggressively. Pick the strings again after each small adjustment. If one stretch remains uncomfortable, try another accepted fingering or a smaller voicing. A diagram describes where notes belong; it does not require every player to use an identical hand position regardless of anatomy.
Check clarity during a real change
Release the shape, form the preceding chord, and move back into the problem chord on a slow count. A shape that sounds clear after several seconds of adjustment is not yet a reliable playing habit. Repeat the transition with light pressure and inspect the previously muted string after each arrival. Then strum the chord normally and listen to the overall sound. Do not chase microscopic perfection at the expense of comfort or pulse. If buzzing persists across many positions despite careful technique, the instrument may need an experienced setup check rather than more force from your fretting hand.
A clean chord needs a clean landing
Now alternate C and Am, x02210, for four beats each. If the C chord is clean when placed slowly but muted after the change, the problem is the landing rather than your ability to form the shape. Practice one arrival, pick the five notes, release, and repeat. If the same open string is dull even with no fretting hand contact, stop adjusting your fingers and inspect tuning, string condition, or instrument setup with an appropriate teacher or technician.
Separate your guitar from the mix
A Suno mix can hide an unclear guitar note when you play along loudly. Check your instrument alone before comparing it with the recording. When your account permits an authorized Suno download, upload the MP3 to AudioChords and use its guitar diagram as a reference for the chord you are testing. A diagram does not diagnose contact or guarantee that a detected label is right. Keep the original recording quiet enough to distinguish your own strings, then restore the complete phrase once the isolated notes ring clearly.