By the example of the Ennstaler Polka I show here all three parallel voices and additionally the counter melody. Click on the note sheet, in order to be able to hear these voices (with bass company).
On the sides "Volkstanz" I published this melody and/or "Griffschrift" without counter melody, and many other dances. There, and here, you can hear the Midi file with two voices without the counter melody.
You can hear the same Midi file here with three voices without the counter melody.
If you want to hear only the counter melody, then click please here.
With the Midi files offered above I adjusted the counter melody much too loud, in order to let it become clear. If you want to hear, like it to sound real could, in adapted volume, then you click please here.