Optical input/DAC and noise

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Hello,

I have a problem I hope someone can help me with.

I have a samsung 40" tv with optical output.

I connected the output to a chinese DAC/Class D Amplifier
(search "TDA7492 Class D Power amplifier 50W+50W support Bluetooth" on ebay).

The problem is that whenever the tv is playing something (movie from usb pendrive/tv signal) the amplifier sounds fine. Not great but there is no obvious noise.

When the television is in standby or I am changing channels or I am on the menu, then I can here a strong hiss/buzz from the speakers. The noise goes away as long as there is a signal coming through.

What can I do?

is the cheap DAC/amplifier the problem?

Do I need to invest in a better DAC? is it jitter?

Thank you very much to all

ClassZ
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.