Hello out there,
Does anyone know what to use to retain the sound with the True-Blast Plus sound units during the
Forward-Neutral-Reversing cycling of the electronic e-unit?  In HO I have heard of adding "Keep Alive" boards but have no idea of what to add nor where to add a capacitor like device to the 3-rail sound units from Bachmann/Williams. 

Please advise if anyone out there has any advice. Pictures/diagrams of what to use and where to soldier would be greatly appreciated.  Love the sound but hate it going away briefly when cycling during switching.

Thanks