[PROBLEM] Choppy Audio at HDMI

[Eikatis]

Hi all

I still have choppy/disrupted audio using the HDMI output of my RPi.
It is connected to a Philips 40PFL6606 TV which is connected to my Onkyo audio receiver via digital coaxial.

1. It happens only at music streaming (MP3 from NAS or webradio). Video/Film streaming is fine!
2. It happens not regular - sometimes i have hours without any stutter, sometimes i have several breaks in one music title.
3. It happens only at HDMI output! Using analog output direct to the receiver works fine (but it is much lower in volume and quality)

This issue happened already at the Alpha version. Currently i'm running at beta 1.1.

And - by the the way - the beginning of each song in a playlist is cropped - at least 1-2 seconds. That's annyoing.

Is that a common behaviour - or a specific problem with my setup (audio via TV to receiver)?