Question Does Voice Rack FX have any additional features that are not already part of VoiceJam Studio Are the vocal effects in the Voice Rack FX the same as in the VoiceJam Studio Answer No, Voice Rack FX is essentially a more stripped-down version of VoiceJam Studio, featuring just the vocal effects selection. Yes, Voice Rack FX features all 50 of the original vocal effects as featured in the VoiceJam Studio.