Recently Amazon sent me a Sandisk 32 GB class 10 sdhc card with a 30MB transfer rate instead of the 32 GB class 4 sdhc card with a transfer rate of 15MB's that I originally ordered. Has anyone used a class 10 with those specs and had any issues recording audio? It was the same price so I would rather not send it back unless I have to. BTW, I use an Edirol R-09HR if that makes a difference. Thanks!