The Rhodope folklore evokes the pain and suffering of the most tortured part of the Bulgarian population during the Ottoman rule. Every song and dance expresses some mysticism, sorrow and pain, but also hope for the future. The hills of the Rhodopes are alive with the sound of kaba (low register) bagpipes. Here the open throat singing is replaced by the semi-closed softer tone formation. Coming from the mountain tops one can hear the chahns, copper sheep bells, which make you forget about time and space.