I have to disagree with 90db on saying that you don't need an interface if you're not recording. Half of what a sound card does is playback as far as function and probably 90% of the music through it is in the playback mode.
I mentioned that I encountered issues with latency when I used Real Band and had synths on the tracks. Latency is a playback issue more so than a recording issue.



Actually, no. “Latency” relates to the time delays between a signal entering and then emerging from a computer soundcard. All sound cards and interfaces exhibit latency to some degree. In playback mode this latency is determined by the speed of the D/A conversion, and is so small as to be a non-issue. In recording mode, latency is determined by the quality of the A/D conversion, drivers and buffer settings.


So... if you are only using BB to create and play the backing tracks, you'll probably be OK..... but if you are using Real Band or some other DAW as the source, you'll need ASIO and an interface that can use that driver if you use plug in soft synths in the tracks of the project.


The OP has already stated that:

“I am currently using CoyoteWT synth I run direct from laptop to Amp/monitor. then into church system mixer.”


The Coyote Forte that Matt recommended will work perfectly on whatever laptop the OP gets.


If BB plays fine, and you need to get a midi source in for live piano or something else, the interface does that PLUS.... it gives you sturdy 1/4" output jacks as opposed to the wimpy 1/8" headphone jack.



The OP didn't say anything about MIDI. Only playback of tracks. And that “sturdy” ¼ output jack is an unbalanced line level signal prone to noise and electrical interference. In fact, it carries the same signal as the 1/8 jack. The unit I recommended provides two balanced, low impedance outputs on XLR's.