On some certain devices, Piano+ may produce distorted sound, wrong notes or latency due to the sound engine. In order to solve this problem, we suggest you some solutions:
1. Turn On/Off Beta Sound Engine:
Open In-App Settings > Advanced options > Switch option between On or Off New Sound engine (BETA)
Restart Piano+ and check the sound accuracy
2. Using Soundfont file:
Soundfont not only helps to fix note inaccuracy but also brings a real HQ sound quality.
See more about Soundfont on