The auto downloading of sounds are controlled by two separate cvars, one for the quake sounds and one for the server sounds.
Quake auto download cvar
// mani_quake_auto_download is a cvar to control whether quake sounds // are auto downloaded to a client. If set to 0 you must provide your own .res files // to initiate transfers to a client. If you change this value from 1 to 0 while the // server is running you must restart your server. mani_quake_auto_download 1
Server sounds auto download cvar
// mani_sounds_auto_download is a cvar to control whether server sounds and action sounds (not quake sounds) // are auto downloaded to a client. If set to 0 you must provide your own .res files // to initiate transfers to a client. If you change this value from 1 to 0 while the // server is running you must restart your server. mani_sounds_auto_download 1 // 1 = on, 0 = off
If you do not wish to auto download the sounds you must manually create .res files to do this.