Audiffex has updated their Summing Tube Amplifier (STA) Effects plug-in bundle to v1.5.2.
This set of five valve simulation plug-ins ($49) is based on combining the wet and dry signals and it adds a nonlinear distortion resulting in more vintage sound.
In version 1.5.2 Audiffex tuned up the Preamp gain to get more realistic valve saturation effect. The new version also fixes the plug-in functionality within the most recent issues of Pro Tools and Studio One 3.
The update also includes the free member of the STA family - STA Phaser, that can be obtained here.