[linux-audio-user] Interfacing a Sound Blaster Live

I've been connecting my Sound Blaster Live card to an old Fostex X-26 Multirack tape deck. I don't record to the tape deck, just use it as a small amplifier and run the guitar signal through it and into the sound card. This means I have to use a Radio Shack Y adapter, ( 1/8 inch sterio plug to two phono plugs) to connect the sound card to the tape deck. This works but its awkward. I was wonder what setups other people use to get a signal into their sound card. Maybe I could improve on this, without spending too much money. Are there any small, clean signal amps out there that allow you shut off the speaker and have an audio line-out? Any information would be welcome.