FrettedSynth updates FreeAmp to v3.5 newseffect plugins Feb 18, 2008 0 FrettedSynth has released version 3.5 of FreeAmp3, a freeware guitar amp VST plug-in for Windows PC. Changes in v3.5 Limiter system implemented. Tweaked control ranges and internal fixed values. Some bugfixes. Visit FrettedSynth for more information and a link to download FreeAmp3.