Rule 1: if it doesn’t work go back and eliminate all possible causes
DEVICES > DEVICE SET UP > VST Audio system- are you using the correct driver - is the latency usable, like 10 msec or less. Some generic drivers are really slow and are useless for this type of work
Are you plugging the guitar and mike into the right sockets, it’s not powered mike is it ?
Start a new project
You should have 2 audio tracks 1 for guitar and one for vocal. You don’t need anything else to start with.
The mixer should show 4 channels - Input, the 2 audios and the output.
Plug in the guitar, open mixer. Strum guitar, you should see indication of the sound on the input channel
Click on the small loudspeaker symbol in the audio track you want for the guitar, strum guitar, you should see the indication of the sound on the input, the monitored audio channel and the output channel. Now change audio channels, click on the loudspeaker symbols of both audio tracks in turn to select second and deselect first.
Strum again, the level indicators should work for the input, 2nd audio and output.
- Disconnect the guitar and plug in the microphone - repeat the exercise - with no monitored track only levels in the input channel, with one channel selected fro monitoring then input, the channel and output show levels.
Now this time, plug in guitar, select an audio channel and play a few chords with the record button selected. back on the main screen a recorded track should have appeared.
Now check to see if this is recorded properly. Deselect monitor.In the mixer there should be levels showing when the play button is pressed, on the audio channel of the guitar and the output (it might also show on the input depending on your set-up, I have any external mixer which will feed the output back into the input)
Switch to mike, deselect channel you’ve just recorded on, select the other channel, redo the check above with the * to make sure everything is connected right.
Now try with the recorded channel playing back at the same time.
Here’s where it gets tricky: I don’t know how you are listening in. Do you hear what’s in the input channel or the output channel. If you are playing back you need to hear the recorded sound, as well as the sound being recorded
So set the system to hear the output channel and select monitor on the channel you are recording (beware of feedback loops) . Play the recorded sound, there should be no level indicator movement on the mike channel.
Play again, this time make a sound into the mike. You should see two different movements on the level meters and hear both sounds together. It is all to do with how the signals are routed on your set up. You only need to do this once.
Reading you last post again, are you recording the guitar with a mike ? If so you are probably not selecting the right channel when recording the second track.
Just go through everything slowly, one step at a time making sure you know what is happening to the sound and where it is going. Once it is properly set up, it should always work for you