The br1600 is a Boss daw. I have changed the gain on both devices with no real affect. The tape outs are supposed to be for connecting to a midi controller, according to the fostex manual, and apparently are not being amplified by the unit. I was hoping to be able to do this without a lot of cash for a preamp, a good one anyway. I thought maybe a headphone amp, but not sure of the signal degradation or soun quality issues going through another device with more volume controls and possible eqs. I was hoping someone knew of a simple 4 input 4 ouput amp or something similar. Once I convert I will really have no need for one more piece of equipment collecting dust. Thanks for any input.