Have a printed launch code? 
KVR Audio recently covered the release of FreqTube FT1-EMU, Freqport’s tube saturation and harmonics plugin built using a SPICE-based reference model derived from the FreqTube FT1 hardware.
The plugin operates as a standalone software solution, with the option to switch to real analog processing when the hardware unit is connected.
Built from the Circuit, Not the Result
As outlined by KVR, FreqTube FT1-EMU is developed using component-level SPICE (Simulation Program with Integrated Circuit Emphasis) modeling.
This approach captures:
- Tube saturation
- Harmonic generation
- Dynamic response
Unlike methods based on impulse responses or transfer functions, this model represents the behavior of the circuit itself at the component level.
A Direct Extension of the FT1 Hardware
The plugin is derived from the architecture of the FreqTube FT1, carrying over its dual-tube structure.
It includes:
- E83CC tube model for bold saturation
- 12AT7 tube model for smoother harmonic content
Each tube can be independently enabled or disabled:
- One active tube for mono
- Two active tubes for stereo
A Tilt control adjusts the balance between the two tube paths.
One Plugin. Two Realities.
A key aspect noted in the release is the integration with hardware.
When the FreqTube FT1 is connected, the plugin switches from software emulation to real analog tube processing using an on-screen Analog toggle.
- Same plugin instance
- Same controls
- Same DAW session and automation
This enables a direct transition from software to hardware processing without changing the session structure.
Why This Matters
The KVR article positions FreqTube FT1-EMU as an alternative to traditional analog-modeling plugins, particularly in how the circuit behavior is represented.
It combines a fully software-based workflow, component-level circuit modeling and optional transition to real analog hardware.
Within a single system.
Final Thought
As presented by KVR Audio, FreqTube FT1-EMU introduces a SPICE-based approach to tube saturation, derived directly from the original hardware design.
It operates as both a standalone plugin and a hardware-integrated solution — maintaining the same controls and session environment across both.
Hybrid made simple.
Read the full article: HERE.