@InactiveX, never seen spring reverb in action myself, but sounds like a very intriguing thing - an analog (and perhaps more naturally sounding) precursor of something that is now achievable electronically. On similar note, I've heard from another Gecho owner who constructed his own "acoustic spring board" and got some very interesting results. It was actually what motivated me to implement "reversed" mode (hi-pass filters), to not cut off the more interesting part of the spectrum.
No probs, this forum software is a good one - it just works. I'll aim to continue delivering our firmware in the same ways

@insektgod, welcome - and happy to hear you confirm it can be used for loud playing. By the way, outdoor usage is possible too (apart from sensors blocked by too much light). Sometimes I take it for a walk in the forest, keeping the lid closed will trigger all four controls halfway, which increases sensitivity to ambient noises optimally.
makes me wish there was a proximity controlled cutoff and resonance in 342 and 344 channels... especially the 344 channel.
Do you mean there should be just one filter active, with these two parameters associated with two sensors? That is quite easy to do. Or, to make use of all sensors, have each pair controlling left and right channel respectively (now I see that calling the preset numbers "channels" too, was perhaps not the best idea...

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Yes, looking forward to see what can the 321 (listening to IR) and 322 (listening to magnetic sensor) be used for. Perhaps there are some interesting sources of modulated IR radiation or alternating magnetic fields waiting to be discovered.