This app can change default system sounds ( Touch , lock, unlock and onscreen keyboard keypressing ) to star-trek like sounds, all changes are applyed on the fly, just the "touch sound" needs a phone reboot to work perfectly.
BusyBox and ROOT permissions are needed.
tested on Onda Tq150
Sounds are saved on SDCARD, after the customization the sounds files on SDCARD can be deleted.
If you receive the Busy-Box error but the Busy-Box is already installed: just delete del SystemSounds folder on SD-Card.