1386 posts since 7 Oct, 2005, from Auckland
The best free digital synth for such sounds IMO is Carbon 2, but you need to install the free Reaktor player then the free Reaktor Factory Selection.
Reaktor synths are unrivalled in this field. For me it is much easier and faster to get the sound I want from these synths.
Sometimes, I need a monster's sound or a scary voice and Razor/Prism/Massive (ok this is not a Reaktor one
) are the commercial ones that I like for any digital sound, but I also highly recommend Carbon 2. I can easily buy it for $50!! It is really a powerful synth
S1 v2.6.5, Reaper 5, Sonar X3, Cubase Elements 8 & Reason 7
FM8, Absynth, Massive, Padshop, Retrologue, Sunrizer, Codex, ARP 2600V, SEM V,Harmor, Air AIEP & Korg KLC; AD 2 & Battery 4
Casio PX-5S, Oxygen 49, PreSonus e4.5, HD 280 pro