Download of Blue Tubes Analog TrackBox 3.3 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the program is Nomad Factory. The most popular versions among the program users are 3.5 and 3.3.
Blue Tubes Analog TrackBox lies within Multimedia Tools, more precisely Music Production. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
The Tube-Emulator section has the unique option of being able to switch between two different sounding tube options from Single-Triode to Dual-Triode. The independent Amount and Color controls permit overdrive of the Tube-Emulator stage to vary the harmonic content of the signal. The Gate/Expander section tames the noise floor so that you hear only the audio you want to keep.
You may want to check out more software, such as Blue Cats ParametrEQ DX Demo, Blue Cat's Phaser - VST or Blue Cat's Stereo Parametr'EQ DX Demo, which might be related to Blue Tubes Analog TrackBox.