<!-- Code generated from the comments of the HWConfig struct in builder/virtualbox/common/hw_config.go; DO NOT EDIT MANUALLY -->

-   `cpus` (int) - The number of cpus to use for building the VM.
    Defaults to 1.
    
-   `memory` (int) - The amount of memory to use for building the VM
    in megabytes. Defaults to 512 megabytes.
    
-   `sound` (string) - Defaults to none. The type of audio device to use for
    sound when building the VM. Some of the options that are available are
    dsound, oss, alsa, pulse, coreaudio, null.
    
-   `usb` (bool) - Specifies whether or not to enable the USB bus when
    building the VM. Defaults to false.
    