To answer my own question: yes, I was trying to do something strange. I think I was running dspsr in parallel with digifil on the same ring buffer. I don't know why the variant without time scrunching did work. Feel free to discard this ticket
Digifil 'invalid input state'
I worked around this by running FFLAGS='-O2 -fallow-argument-mismatch' ./configure
Lua build error on CentOS 7
Add explicit std::move for compatibility with older gcc
CMake: GTKMM feedback
Pow10 not defined on ubuntu 18.04
Use new add_aterm function in IDG api