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For the uninitiated this is using Neural Amp Modelling (NAM) captures of guitar amps (yes guitar amps all sounds different and people like to use different ones for different things).
NAM (an open source project) is about 8x more expensive to run that a standard C++ amp simulator (which emulate tone characteristics of a guitar amp using standard DSP algorithms).
However, I'm not seeing a link to the code here. Without that it's just an article and could be entirely fictional.
Always great to see folks modding their audio interfaces. How's the power draw with NAM running on that hardware?
Oh excellent! Once I get a bit of time I will try hooking NAM A2-l to a controller and then putting THAT inside of one of my old drive pedals for style.
MCUs are getting crazy. ESP32-S31 running Linux. 40MSPS/12b ADC+DSP on dsPIC33A. New Renesas parts running a 1GHz. RP2350 roflstomping things with PIO. The Cortex M7 in this story is actually pretty old now: circa 2019.
Fun times.
I was surprised seeing a 500Mhz MCU in the iRig. That seems seriously overpowered for what it does?
It depends. This product is pretty niche, and when a ~$3 MCU gives you the headroom you need without a team of career engineers on the payroll, it can make sense. Also, it's running USB power as opposed to batteries.