recording multiple tracks simultaneously?

I should know this, but I don't...
I've always used CW to record one track at a time and just layered.
Now, I want to record vocals on one track, bass on another, but I want to record them at the same time.
What is needed for that? I've got MC, my laptop or desktop, but wouldn't I need some kind of interface to do that? 
I have the Delta44 with the breakout box too.

Not sure how I'd set this up.

The question i would ask is why. If you play the bass and sing at the same time you risk bleed over into the mike. Especially if you mike the bass, but even from the finger movement on the strings if you go direct to the system with it. Mike pick up a lot of stuff.

Sometimes we do this so that we get that "live" feel but you can still do that by singing along while you play the bass, or guitar, and then using that time as practice time to get the vocals right them once the bass track is good fire the mike up and let 'er rip!

you won't be able to do simultaneous inputs with the laptop unless the laptop has a separate MIC and LINE input, which is highly unlikely.  most laptop soundcards come with a combo MIC/LINE input and you switch in the windows mixer.  so yeah, you'd have to get an external USB soundcard to hook up to the lappy.

My old CWP8 software with Proteus was like that. I had to spend quite a lot of time setting it up every time I sat down to record..... what a pain. By the time I got it working properly, the creative spark had gone out....

This looks right to me, but I'm hearing the BT track on the others when recording and the bass and vocal track aren't very loud at all.

ok - how do you have the bass and microphone connected to the Delta 44?  and what microphone are you using?

my guess is that you're trying to connect them directly to the D44's inputs, but those are LINE inputs and the bass needs a preamp to bring it up from INSTRUMENT LEVEL to LINE LEVEL and the mic needs a preamp to bring it up from MIC level to LINE LEVEL.  and if it's a condensor mic it also needs phantom power.

you want the new track to record only it's input..... I forget what it's called but I think there is a box you need to check or uncheck to keep the existing tracks from being echoed into the new ones.....

Beagle will answer this I'm sure.....

if you solo the bass track, you should be able to hear it clearly. At times the other tracks will interfere with the sound so ALWAYS solo a track when you are trying to troubleshoot something.

That said, the signal going in should be recorded exactly like it goes in. The drivers used should not change the sound.... they simply determine how efficiently the software and hardware work together...or not.

With a decent interface, ASIO is the preferred driver. most of the factory cards will not work well with ASIO so if that is the case, a lesser driver is needed.

From what I saw in the screenshot, you needed to get the bass levels up considerably. The wave for the bass should be about the same relative size as the track above it.  Once you get that level, you can hear the bass for what it is.

A short cut would be to select the track and use normalize to bang the bass track up to a reasonable level..... HOWEVER.... that IS NOT the solution to the problem. That is a shortcut to see what the bass really sounds like. Ultimately, you want the levels coming in to be much stronger to give you a good signal to noise ratio in the track.  Using normalize on such a weak signal will also boost the noise, which is what you don't want to happen.

Also remember: you can export the musical clip and post it online and provide a link so we can also hear exactly what you're referring to and possibly help you solve the mystery.

Correct, but as Beagle mentioned, they're line inputs and I was going direct with the mic and bass. Dumb mistake on my part for sure.

As far as ASIO and the D44, it seems like that whole thing could be so much more straight forward.