Strange sound on Windows 7

[Hubert]

Hello,
this is my first posting in this forum, please accept my far from perfect English...
I run Minimserver successfully on Linux (Ubuntu 14.10) and on the new preview of Windows 10. Perfect in operation and quality of sound.
There is however a strange phenomenon in Windows 7. The audio sounds as if it is cut into tiny pieces, like a staccato. I know it is hard to explain, graphically e.g. like IIII--IIII--IIII--IIII-- (III the signal, --- some milliseconds of silence) or as if the audio was superimposed by a "grrrrrrrrrrrrr..."
This cannot be caused by the sound card because the same "staccato" is heard on my smartphone when I use any UpnP player app like Mediahouse or ArkMC. It must be the combination of MinimServer 0.8.3a x64 and Windows 7.
Is there any "switch" in the server's property sheet which could eliminate this strange phenomenon?
Grateful for any advice,
Hubert