Aspect change macro

I have a macro to change the Aspect and I want to (temporarily) turn the sound effect off.
/console Sound_EnableSFX 0
/cast [noflying,nomod] Aspect of the DragonHawk
/cast [noflying,nomod] Aspect of the Viper
/cast [mod] Aspect of the Cheetah
/cast [mod] Aspect of the Pack
/console Sound_EnableSFX 1
problem is this is not defeating the sound. Can anyone suggest a (macro code) way to do this?