I have audio dropouts where listening when connected to a TCL TV with an Apple TV. No audio dropouts when using a Marantz NR1200 instead of the ZD3.
I am in contact with Fosi Audio support to help me. Here is the question I asked them :
Is it possible to change the DPLL setting ?
ZD3 and SMSL DL200 have the same DAC chip ESS ES9039Q2M.
You can read from the SMSL manual :
https://www.smsl-audio.com/upload/portal/download/DL200Manual.pdf
DPLL 1~9, the lower the value, the smaller the clock jitter.
This DPLL setting is a unique function of ESS series products. It can adjust the bandwidth
of the DPLL digital phase-locked loop circuit inside the chip, so that the chip can achieve
a balance between anti-clock jitter and input tolerance.
Effect:
- When the clock stability of the input signal is good, this value can be reduced, so
that the clock performance of the system is better;
- When the clock stability of the input signal is not good, the sound may be
interrupted. Increasing this value can avoid the occurrence of audio interruption!
Especially when using TV as the signal source.