Please also make sure that the Volume is set to max both the Windows MIDI volume and the EarMaster volume setting for Chords, Rhythm and Metronome. All of them can be changed in the EarMaster Program settings. EarMaster uses the MIDI-sounds in your soundcard. A soundcard with wave table technology will give you a better sound. The best solution is to use an external or internal MIDI module.
Some sound cards has a delay when they play tones.
EarMaster can compensate for this. Please notice that the clap sound from the space bar will be disabled when setting a delay. This is because the delay from pressing the space bar until the clap sound cannot be compensated. If no driver is listed then you need to install one that fits to your sound card or MIDI interface. Often Windows cannot handle if two programs want to use MIDI in at the same time.