> Do you know how to configure the new EaglePlayer version to make it work on MorphOS?

I use the default configuration, except that I activated the AHI Amplifier as the only Amplifier engine. In the AHI Amplifier settings, I selected a HiFi 16 bit stero++ mode and 44.1 kHz mixing frequency. That's it. If it still doesn't work for you, it may be worth tinkering with the Configuration -> Timing settings.