^ definitely as the jam feature is too restrictive on the mobile phone.
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So after a few hours:
Really enjoying the jam feature; which was the primary reason for the buy as I play exclusively alone.
I have read a lot of feedback issues due to grounding on the PSU but I've not noticed any significant feedback unless going for the high gain settings but I suspect that's simply due to sensitivity as muting the strings, kills the feedback. I am little confused as to when or how the amps controls are used in conjunction with the app and tone settings. I've had a few "hangs" if you can call it that when the amp doesn't do anything; both the on and tap lights are persistently on and the amp requires a power cycle to fix.
Lastly; I cannot seem to get the tone sounds as heard on yt vids; especially clean bluesy tones. I've noticed on a few unboxing vids my tone selection does not match the presenters!? There's definitely a lot of stuff on the tone-cloud so further experimentation is required. This is where I suspect the amp controls need some twiddling along with the app tonal settings.
e: yowsers; some amp and tones produce outrageous feedback! Not sure if it's the PSU grounding issue or not.