The cheapest graphics card you can play it on is an NVIDIA GeForce 6100. An Intel Pentium 4 2.00GHz CPU is required at a minimum to run GraviSound. GraviSound system requirements state that you will need at least 512 MB of RAM. In terms of game file size, you will need at least 150 MB of free disk space available.
GraviSound will run on PC system with Windows 7 SP1, Windows 8.1 or later, Windows 10 and upwards.