Audio Resampling in Live TV

Is it somehow possible to monitor the frequency of the audio resampler in Live TV? I am experiencing constant fluctuations in audio frequency. It is very audible on constant tones.

There are no visible frame drops/skips and also respective counters are not increased. So I assume clocks not to be that much off.

Any ideas? How can I debug it?

I am on a Sony Android TV (6.0.1) with MediaTek MT5891 (with a rather poor dual core ARM Cortex A17 @1GHz).