Hi Keetakawee,

Upgrading Fidelizer to Fidelizer Pro on Control PC of Jplay has apparent impact on sound, more depth, more air, and more contrast. I think it is an essential software for PC audio, and one of the most cost-effective investment. It is worth installing Fidelizer Pro on both Control and Audio PCs for Jplay dual setting.

Regards,

Hiroshi Ichino