@treynterrio I had to go into HISE's source code to change this some time ago. Look up SimpleEnvelope.cpp or AhdsrEnvelope.cpp. There you can change the max values of the parameters. I believe you also have to add a preprocessor for it to work HISE_SCRIPT_SERVER_TIMEOUT=yourMaxTimeHere or else it kinda cuts off. Finally rebuild hise.
⚠ PD: play with HISE's source code at your own peril.