The Strap 3 is marketed for music listening, so I would imagine it would be workable? I've yet to try any of their stuff, though. The appeal seems to be around ease of use, and the targeted chest vibrations.
And the ButtKickers are purely mechanical, so no DSP. I would steer towards their Concert line as it's meant specifically for music, whereas the LFE has a stronger response from 20-30hz for home theater type applications.
I wrote few of these algorithms myself for some other products.
There is always a trade off between fidelity and immersive feeling because the basses were not meant to be used with such product in mind.
With my company, Interhaptics, we built a full stack pipeline only for haptics. Our tech is at the basis of the MPEG haptics encoding standard coming out shortly.
We have been recently acquired by Razer, look out for news of you are interested to build for touch natively
If he is looking to get the bass feeling of the music you want the pure input.