Qobuz (highest available signed bit value/sampling rate for appropriately engineered music, downloaded and streamed) and ripped CD's. Both wonderful to listen to. Store ripped/downloaded music on Innuos Zenith SE. Slight edge to downloaded equal bit/sampling frequency format, but thoroughly enjoy ripped CD's. Some music in my collection and of interest to me isn't available in Qobuz USA. Biggest determinant of sound quality in my rig is full dynamic range and excellent sound engineering during recording/mixing. My configuration is Innuos Zenith SE->IsoRegen->MScaler->Wave Storm BNC->Dave->Moon Audio Black Dragon->Focal Utopia.