adc => LiSa looper => dac.chan(0);
fails.
That's a bug in 1.2.1.4 then, that should work. What OS are you on?
linux and jack
It could be a RtAudio issue.
rtaudio.h tells me // RtAudio: Version 3.0.2 (14 October 2005) seems to be old :-) I would assume the bug is in LiSa and/or multichannel code, because it depends on the way it is connected, remember this works: LiSa looper => dac; chuck's multichannel code seems to have some problems anyway.
looper.rate(2);
on further testing I found it's because the parameter should be a float (as you also suggested). Sorry, I was fooled by the fact, that 1.2.0.8 worked.
If you mean that line then you might want to try rate(2.0) to force it setting the rate, instead of getting the rate of the default (first) voice. I think that might make a difference. LiSa's functions are rather overloaded which can cause some confusion with implied casting.
indeed... Do you mean the function is overloaded with a function rate(int x) ? if so what is the purpose of x? Or will a rate(2) be delegated to rate()?