Problem with DAC ES9018 and Raspberry.

Hello, I just downloaded and flashed Volumio on my RPi 2 mod B.

I bought an ES9018 DAC from Aliexpress with I2S interface, connected all pins, and select from settings “generic I2S DAC”.

Now, when I click play on a WAV file that simple contains a 1kHz sinusoidal wave (16bit 48k) I see in my oscilloscope random oscillation at the output:

The FFT:

And the volume control seems not to work. Any idea of the problem?

P.S. if there is anything playing, i see nothing on the oscilloscope.