I wonder if Zidoo team still working on X9S firmwares. Because I have audio drop problem almost every movie one or twice. Drop issue takes about a second since last 3-4 firmware. Each time when I decide firmware update, I always did factory reset before the update.
Don't think there will be any updates. Return to 2.1.28 - this is the last version without audio drops. .30/.36./.40/.42 are crap and the audio drops that .30 intoduced are still not fixed. Furthermore they don't add any real benefit anyway. So just do a downgrade, .28 is the best firmware for this device.