Source Audio SA 249 One Series C4 Synth

The presets are a nice example of what this thing can do but, to get the best out of it, you need to be willing to learn how to use subtractive synthesis. And it is absolutely worth it!

There are plenty of presets made by other people, which you can download, and these explore yet further possibilities - from kalimba+flute, to a remarkably aggrotech-compatible growling sound. Use these as they are, or as inspiration and jumping-off points.
It will take you a very long time to reach the limits of what it can do.

The tracking is startlingly good, as long as your muting is good enough. If it's not, well, now you have a reason to work on it :)
It even keeps up with slide guitar and fretless bass!

Cons? It's _mostly_ monophonic, so your options are limited if you want to play chords through it.
However, since it's basically a Spectrum filter pedal with a synth section bolted on, you could always play a HOG2 through it...

I was looking for a synth pedal for my bass but at the same time I wanted something unique to play around. This checks all the boxes.
I can store "only" 6 sounds to be easy accessible but I can create and store in the memory 128 sounds to play around with but then the pedal has to be connected to my PC or smartphone.
It requires a lot of reading and experiments to create your own sound but it is totally worth it. On the other hand at the moment there are already 6750 uploaded sounds from other users in the cloud that you can store in your pedal. Good luck if you want to go through all of them. The list is huge.
What Source Audio has created here is pure fun for people who like to experiment and be creative with their sound.
Some sounds are a bit "cold and dry" but it is up to you to change them.
The biggest disadvantage is that there is no built in bluetooth to be able to connect it to your smartphone. The connection can be done only with a cable. That is a bit of a disappointment.
If you are willing to spend some time with it go for it otherwise choose a more straight forward boring pedal.

Pros:
- The pedal itself has 6 presets on board, 3 main ones and with the help of a toggle switch on the back panel 3 additional ones
- The sounds themselves are gorgeous, Good stability, ive used some synth pedals before and i liked C4 the most
- You can use App to make our own sound
- Well made

Cons:
- It is inconvenient to switch presets during a performance, because if you just switch the toggle switch on the front panel, the sound itself will not change, you need to press the pedal, turn off the sound and turn it on again, then the preset will change. You can buy a Neuro adapter and use simple controllers to switch presets, but I don't see the point because the sounds are very similar to each other, and I don't understand why there are 128 presets.
- t's a pretty bad octaver. There's a big delay in the signal, and while the lower octave is still fine, the upper octave sounds cheap and unnatural.
- Neuro App doesn't mention that you can only log in to your account from one device. I had the app installed on both my laptop and smartphone, but I kept getting strange errors until I logged out of my smartphone account. The pedal didn't show up in the app for several hours, but then it suddenly became visible. I submitted a ticket to the developers, but six months later, I still haven't received a response.