These devices are mostly inaccurate due to acoustics and/or dust that gathers on the microphone which can have a negative effect on the frequency that is being captured. All pianos are different and have to be tuned according to their unique situation.
Hierdie toestelle is meesal nie betroubaar nie weens die akoestiek en/of stof wat op die mikrofoon kan versamel en sodoende die frekwensie negatief kan beïnvloed. Elke klavier is uniek en behoort daarvolgens gestem te word.