Is your ? It’s a frustrating roadblock, especially when you’re ready to practice or record. Whether the needle isn't moving, the app isn't "hearing" your guitar, or it’s displaying incorrect notes, most issues stem from microphone permissions , background noise , or calibration settings .
Check for lint or dust in your device's microphone port. A quick blast of compressed air or a gentle brush with a dry toothbrush can often fix "deaf" tuners. guitar toolkit tuner not working