Rev 4847-4852 There is interface in Clover GUI to tune startup sound parameters Computer will play a sound before enter Clover GUI. To do this you have to 1. Use CloverX64.efi revision 4852 or up. 2. Place AudioDxe-64.efi into drivers64 and drivers64UEFI. Playing is possible in both legacy and UEFI modes. AudioDxe.efi is included into Clover project and will be differ from original by Goldfish64 but almost compatible. 3. Place sound.wav and may be sound_night.wav into your theme folder, for example /EFI/CLOVER/theme/Clovy/. The sound must be 16bit, and 44100 or 48000Hz. But I also made conversion on the fly so 8000Hz is also supported. 4. Tune sound output in Clover GUI as on screen above. The settings will be stored in NVRAM and used next restart. With legacy Clover or systems without nvram you have to use EmuVariableUefi.efi and rc.scripts to save nvram.plist. For very new systems like Z370 where nvram is not working in macOS there is a chance that the nvram is working on Clover level and so all will works. SIC! Legacy Clover saved Variables only with Apple guid so why it will not work. After some discussing I may rebuild the system to use AppleBootGuid. In this case the system will not be compatible with the original driver but will work with legacy systems.   No more needs in BootChimeCfg and BootChimeDxe while the compatibility still remains.