I turned my Linux desktop into a tube amp.
Well, not literally. I *emulated* a tube amp in software, then routed the whole thing through an external DAC and into my receiver.
I started with EasyEffects and Calf Exciter, but that was the wrong tool for what I wanted. The Exciter only works on the upper part of the frequency range. I wanted the whole signal going through something more like a tube stage.
So I installed Carla and loaded Calf Saturator.
Carla is basically the host, and Calf Saturator does the dirty work.
Inside Calf Saturator, I kept the effect fairly subtle. Input Gain stayed at 0 dB. Blend moved toward Tube. Mix stayed at 100% Wet. Pre and post filters went off. Tone controls stayed neutral.
For Saturation, I started around 2.5 instead of the default 5.
This is because I wanted colouration, not obvious distortion.
Then came the next problem: getting Strawberry Player through the plugin.
Strawberry wasn’t showing up in Carla’s routing view, so I switched Carla to JACK and used qpwgraph to handle the actual PipeWire routing.
With music playing, qpwgraph showed Strawberry connected directly to my FX-AUDIO DAC.
So I disconnected those direct connections.
Then I routed it like this:
```text
Strawberry output_FL
→ Calf Saturator in L
→ Calf Saturator Out L
→ FX-AUDIO playback_FL
Strawberry output_FR
→ Calf Saturator in R
→ Calf Saturator Out R
→ FX-AUDIO playback_FR
```
So my final setup is:
**Strawberry → qpwgraph/PipeWire → Carla → Calf Saturator → FX-AUDIO DAC**
Carla hosts Calf Saturator.
qpwgraph handles the routing.
Calf Saturator adds the tube-style harmonic coloration.
Once everything was connected, I could open the Calf Saturator GUI and hit Bypass to compare the processed sound with the original.
So why bother doing any of this?
Because I already have a receiver. A good one. I don’t want to buy another piece of gear just to stick it physically between my DAC and my receiver.
And apparently, I don’t have to.
If I can emulate the gear in software, why buy the damn box?
And it WORKS.
I have spent the ENTIRE DAY trying to get Linux to simulate tube amp effects because I do NOT want to buy a tube amp.