Playing a 5-string chord on a guitar with 6 strings is not inherently a problem. However, it may result in a slightly different sound or voicing compared to playing the chord on a 5-string instrument. Here are a few considerations:
Extra string: When playing a 5-string chord on a 6-string guitar, the extra string can add additional harmony or tonal richness to the chord. It can create a fuller sound by adding additional notes or duplicating existing ones.
Muting the unused string: If the 6th string is not part of the chord you're playing, you'll want to ensure that it is muted. You can achieve this by lightly touching the string with a finger or using the palm of your strumming hand to dampen the string's vibrations.
Chord voicing: The specific voicing of the chord may be affected when playing on a 6-string guitar. You might need to adapt fingerings or find alternative positions to accommodate the additional string. This can influence the chord's overall sound and playability.
Context and musical intent: The appropriateness of using a 5-string chord on a 6-string guitar depends on the musical context and your artistic intention. Sometimes, musicians intentionally explore unconventional voicings or modify chords to achieve specific effects or unique sounds.
Ultimately, whether playing a 5-string chord on a 6-string guitar is a problem or not depends on your musical goals, the sound you're aiming for, and the specific context in which you're playing. It can be a creative choice that leads to interesting results, but it's important to be mindful of the resulting sound and adjust your technique accordingly.