Hi,
- how do you do the power supply to the terrarium and do you cut the USB connection to the PC when playing?
- What kind of noise are we speaking of? I can hear some overdrive noise in your post. Do you mean that kind of noise?
What amplitude in mVpp is “~10dBFS” ? Did you use exactly the same level? - Is this an exact clone of Terrarium, same parts and schematic?
One significant difference between Rev5 and Rev7 is in my opinion, that the codec of Rev7 is running at 4.5V and if it’s supply comes from USB then Daisy’s regulator has very low voltage difference to operate, so an additional 9V battery (6*AAA) can make a difference. But this in my case was about background noise. ( Rev 7 noise floor vs Rev 4 - Troubleshooting and Support - Daisy Forums (electro-smith.com) )