Establish the correct reference
Confirm the tuning intended for your instrument and strings before adjusting anything. Common high-G GCEA tuning is not the only setup, and baritone instruments often use different pitches. Use a tuner in a quiet setting and pluck one string at a time with a moderate attack. Let the reading settle rather than chasing the first instant of movement. If you are uncertain about the correct octave or string type, check with a knowledgeable teacher or technician before tightening toward an assumed target.
Recheck after the first few minutes
Play a few familiar chords, then check the open strings again. New strings or changing conditions can require additional attention. If a fretted chord sounds sour while open strings seem correct, inspect finger pressure and placement before assuming the chord chart is wrong. Excess pressure can affect pitch, and one poorly contacted string can make an otherwise valid harmony sound unclear. Compare a gentle fretted note with a harder grip to hear whether your technique is contributing to the problem during actual chord changes.
Keep tuning separate from harmonic diagnosis
When a detected AudioChords label seems not to fit, first confirm that your instrument and the audio reference are at compatible pitches. A recording may also be offset from your tuning reference, so test several stable notes rather than changing individual chords at random. If the whole track seems consistently between pitches, note that observation and choose an appropriate practice reference. Finish each session with a quick chord check and store the instrument according to its maker's care guidance. Reliable tuning does not solve every harmonic ambiguity, but it removes one avoidable source of confusion from ear training and accompaniment practice.