If you look through the forum using the search function you will find a lot of information posted in the last 2 years.
Bears will either come in rushing or take their sweet time. I have even had bears in visible on the other side of a clear cut and totally ignored the call. Calling is not a guarantee that the bear will present its self
You can use the spot & squawk or blind calling in good habitat. If you blind call make sure you call for an hour, longer if you have confidence in the location.
I start off with a softer call (fawn bleat) for the first 5 minutes then I put more panic in the call. I try to build to a high point then soften up for a time. What I try to do is pattern the "lost child" with a soft Mom?....Mom...Mom!...MaMa..MaMa...MAMA (cry)...MaMa (whimper)
With a tape system you are limited to playing with the volume. I have both but prefer the hand calls because I can control the script. What I have seen a fawn do is run back and forth looking for its mother bleating at each end of a 30 yard run. So having ground sounds along with bleats would be great.
I hope this helps