Ukraine: Igor Shamo

Ukraine issued this post card in 2000 honoring composer Igor Shamo (1925-1982). The stamp image itself features various music-related elements, but the image on the lower-left of the card shows the composer with a background of organ pipes. I have not been able to determine what Shamo's relationship to the organ may be. This helpful site goes into some detail about his training and musical career, and an extensive list of compositions, but no clue as to how or why organ pipes might figure into a post card honoring him. I am not sure where or when I got this post card, and it does not appear in my Scott catalog. I would be happy to hear from anyone who can help detail Shamo's relationship to the organ, or why organ pipes feature on the card in his honor.