Hear the upper note as part of the arrangement
A strummed chord has a top note that can become prominent, especially on a bright instrument. Play the chord slowly and listen to its highest pitch against the sung phrase. The chord may be correct while the upper note competes with a sustained melody note or creates a tension you did not intend. Do not immediately change the harmony. First consider whether another voicing, lighter attack, or selective string choice would support the voice more clearly in the same key.
Compare two playable versions
Find a second voicing of one important chord using a reliable diagram or your knowledge of its notes. Play both versions under the same short vocal phrase at the same volume. Keep the rhythm simple so that you can focus on the relationship between the chord and melody. A higher voicing is not automatically brighter in a useful way, and a lower one is not automatically warmer. The result depends on the surrounding notes, the singer's register, and what the accompaniment does immediately before and after the chord.
Choose consistency across the progression
Connect your preferred voicing to the neighboring chords and check the hand movement. A beautiful isolated sound may not be practical if it creates a large jump at every lyric entrance. Use AudioChords as a harmonic reference while making the register and fingering choices yourself. Record a verse and listen for whether the singer remains the clear foreground. If the arrangement works with simpler shapes, keep them. The purpose of exploring voicings is to gain useful options, not to replace every comfortable chord with a more elaborate grip merely because it exists somewhere on the fretboard.