Thanks Pamadu. It is indeed still a tracker action-organ! It was completely restored to it's original state by the dutch organ builder "Flentrop" in 1983, which is rather extraordinary considering Latvia was a communist state at that time. But basically the Riga Cathedral Organ was considered
the pipe organ in the Soviet Union. I have in my collection many Melodia records recorded on this spectacular instrument.
The reason I "bump" this old thread is that I just today discovered that there has been a lot of interesting reviews of this mp3 download at amazon.com. Nice