I know the basic concepts of BIAB (I should, I've been using it for more than 25 years) smile

But I would still like to know what is happening now with my current version BIAB 2021).

I installed BIAB and didn't hook up any Midi instruments yet.
So if BIAB is using Midi it is doing so with its 'in house' Midi.

I entered the chords to a song and also a lyric layer.

I wanted to render .wav files for the three part (bass, drums, piano).
I figured out how to do that.

Now for my questions.

Are my song parts midi parts or audio parts? I was under the assumption they were all audio. They sound like audio, but these days midi has gotten quite sophisticated in its sound.

How can I quickly tell if my parts are midi or audio?

When I look at my Mixer I see an added line at the bottom saying:
'Audio'.

I wasn't asked about it when I created my song and don't know what it is?

When I played back my song it sounded OK but I just realized that two layers of the song are being played back, the bass, piano drums 'layer' and the audio 'layer'. When I muted the audio 'layer' it sounded more pure.

Similarly, I could mute the bass, piano drums 'layer' and just playback the audio 'layer' and it sounded exactly the same as just the bass, piano drums 'layer'.

So what the heck is going on here? smile

A BIAB user for more than 30 years (if you can believe it) !