Hi,
To do random sound i usually do this with arrays and audio play
So i have my audio into an array (sounds) and i use 'array get random indexed'
(this is a custom action i made, because the standard 'array get random' is not storing the index number) and store the sound and the index nr.
Then i have another array (Volume) with a float value for the volume for each sound.
and i get the volume with 'array get' and use the index number.
Then i use audio play with the sound and volume variables.
If you don't need separate volumes you can just use one array (sounds)