Playing sound is distorted and delayed by about one measure

I am using Musescore 2.0.2 on several versions of openSUSE under KDE. My sound system has two interfaces. One is the rather simple line-out Analogue Stereo. the second one is the HDMI interface of the graphics card. I use Fluid3Mono_GM.sf3 in the synthesizer.
Playing the score via line-out this normally starts with sound of the notes, but it is distorted. However about one measure later there is a delayed kind of echo playing the same notes. When I start System Settings and choose the module Multimedia there are test buttons in one of the tabs to test left and right speakers. After pressing one of the buttons during playing of Musescore or before playing Musescore, the sound of Musescore is no longer distorted and the echo is gone. So I have a good sound which is in sync with what the cursor in Musescore is showing.

When I use the HDMI device for sound, the sound is about one measure delayed from what the cursor is showing. Also clicking on a single note, the sound for that note is delayed by the same amount. Pressing the button for left or right speaker gives no sound. However in the configuration module for the sound system the test button for a test sound produces the sound as it should.

I found the commend 'aplay -l' to show the configuration, which gives:
**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: VT1818S Analog [VT1818S Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 2: VT1818S Alt Analog [VT1818S Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 3: VT1818S Digital [VT1818S Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 0/1
Subdevice #0: subdevice #0

The command 'ls /dev/snd/' gives:
# ls /dev/snd/
by-path controlC0 controlC1 hwC0D0 hwC1D0 pcmC0D0c pcmC0D0p pcmC0D2p pcmC0D3p pcmC1D3p seq timer

Any help on how to get proper sound highly appreciated.