i have power tracks 11 pro
and i like the harmony efx
can you use that efx in another
DAW like reaper

thanks

No

Now if you had BiaB and could use the BiaB plugin in another DAW, you may get close .. but the harmonizer in PT 11 is only for PGMusic products.

of course you can always open PT, generate the harmony, save the harmony as a wav file and import into your DAW