Hi… Thank you for your interest. I am at desktop Pc. I have Texas fw but I change the driver to the legacy. It didn’t work but after that I tried the utility again and change the type 400 to 200. After that It’s better. Most of the time the “stutter thing” is gone now. But it’s unstable. Sometimes I can hear it again. Strange thing is with specific vst’s specific notes are doing this. I don’t think that my fw card is bad becouse 1: It’s new, 2. I use the presonus studio live 16.4.2 with no problems like this. I never had problem with this programs before. Even with my old terratech ews88. I don’t know what can I do now. I really want that card and when I finally buy it I have crunchy sounds. I am really sad. Do you have another suggestions for make it stable?