Why does my headphone amplifier produce a noise when it is not working?

[Kombuhe]

Hi, is it proper to post here? As this is a question about my headphone..I wonder if anyone can help me.

In order to try to use a high quality headphones-amp TI TPA6111A2, I'm connecting the input to 0V (i.e. no audio input) to first see if I get a clean very-low-noise silence sound in the case no audio is flowing.

According to the datasheet of TPA6111A2, it gives something like this:

 

 

I payed attention to "Typical Application Circuit" (page 1) and page 14, 15, 16 for the choices of the resistors / capacitors.

Still, I get an audio buzz. It is clearly too much, as the TPA6111 is said to be really better than I have according to its specs.

How to debug such a buzz, even when no audio is flowing?

Thanks for taking time to read this.I'll be grateful if you can answer me