A slight popping sound during audio playback on the Redmi Pad Pro can be due to several factors as below:
1. The audio processing system introduces minor artifacts, especially when adjusting playback speed or skipping through tracks. For example, after recording audio with the default recording format of m4a, play at 0.5X speed and tap the [3 seconds forward] icon, then there will be a slight popping sound. This popping sound is a result of how the audio engine processes these commands by invoking Google's interface and it will not affect the functionality of the recordings;
2. If the system is overloaded or there is not enough space for storage, there will be slight lags in keeping up with audio data, so it will produce occasional popping sounds as it catches up;
3. If you use the third-party audio player for the playback, software-related issues will affect the playback, such as bugs or compatibility problems with the third-party audio player.
If the issue persists, consider checking for software updates, restarting the device, or using a different audio player to check if the problem is resolved.