I understand that your thread is a year old, and you're still in search of an economical way to control your two SA pedals, the Spectrum and Ultrawave, for an even more enjoyable musical experience. While your initial inquiry was made in 2022, it's worth considering that advancements in technology and product offerings may have occurred over the past year.
I recommend revisiting the Source Audio community forums or exploring websites like lalightingandsound.com for updated information on budget-friendly MIDI control options. Since your original post, new solutions might have emerged that are tailored to your specific needs.
