I have around 15 SACD's and also the 47Ai player and there are no problems on my end. Sounds like it is your player since it only happens with SACD discs. A buddy of mine has the Toshiba 9200 and it made a whirring sound when spinning discs, he had to take it to a shop for a fix. The 9200 has been widley known for this, but the 47Ai has had no such problems mentioned.