how can I record stereo track with my guitar or mic?

That's easy. Just record it twice and than pan tracks as you wish.

Hi. You can right click on the clip, and choose convert to stereo. 
All the best.

Zargg71
Hi. You can right click on the clip, and choose convert to stereo. 
All the best.

This^^^  A guitar or mic is inherently mono, so you need to convert it to stereo. However, if you insert a plug-in that's stereo, most will generate a stereo output from a mono input so that's another way to get stereo. 

karma1959
 
 
Another option is to record it once (in mono), clone the track you just recorded and pan the two resulting tracks left and right.  Bear in mind, this won't sound any "fatter", as it's the exact same signal, just taking up a wider portion of the stereo spectrum, and it will sound louder, since you're adding more of the same signal. 
 

This. After you create two tracks, you can fiddle with the equalization to achieve a broader sound.

a stereo track where one side is a 100% clone has no advantages.
Use mono for mono instruments and mics, and then pan left-to-right.
 

frkfir
Sorry, but I don't quite understand what you told me to do.
I am new to this software :(

A picture is worth a thousand words.
 https://vimeo.com/149988041

Something this thread hasn't touched on, or not in detail at least, which might be useful to the OP, is that there's almost never a good reason to record a guitar in stereo. I think I'd like to go back to the start and find out why the OP is trying to do this.

John T
Something this thread hasn't touched on, or not in detail at least, which might be useful to the OP, is that there's almost never a good reason to record a guitar in stereo. I think I'd like to go back to the start and find out why the OP is trying to do this.

I was thinking the same. My guess is, it's the very, very common misconception among beginners that every track needs to be stereo because you're making a "stereo record". It comes as a surprise to many, that usually most of the tracks are mono.
To the OP: Recording a mono source as mono leaves you the options to pan the instrument wherever you want in the stereo field.
A stereo track, one that has different material left and right, can not be panned as easily, as the panning is actually balance setting. Then you need a plugin like Channel Tools to pan it in a controlled way (ie. not fading away the right side material when you pan to left). Piano is a good example: If you record (stereo) the right hand parts on the right channel and left hand parts on the left, when you pan it to one side, the material on the opposite side does not move to  the panned side, but simply fades inaudible.

Which version of Sonar ? check your routing on your Tascam.
load a stereo file in to sonar and pan that stereo file left to right. make sure you have sound in L + R speakers.
you need to eliminate the Tascam as a problem then you can go on to other things.

Kalle Rantaaho, kiitos paljon! :-)
 
I bounced (right click "convert to mono") the track to mono. Now I hear in both speakers!!! Problem solved. Hurraay!
 

It is worth noting for anyone else who has a similar question and comes across this thread, that each audio track has a little stereo/mono button. This should be set to mono when recording/playing a single channel/mono source and set to stereo if the source is stereo.
 
You can not just convert a mono source to stereo by some kind of magic button. However, adding an effect such as reverb that is stereo will result in a stereo sound. It's a good idea to think with the mindset of those who, back in the day, recorded with analogue mixers and multi-track tape machines - every mixer channel and tape track was mono. You would plug a mic or DIed guitar/bass into a single channel on the mixer and record it to a single track on the tape machine. Only if you were working with a stereo signal e.g. synth or stereo pair of mics, would you plugin to two inputs and record to two tracks. On playback/mix, you would pan the mono signals to where you wanted them in the stereo field and hard pan (left and right) the stereo paired tracks. The only difference with Sonar is that you can use a single stereo track for stereo sources instead of two mono tracks.
 
One simple trick to fatten and stereoize a mono sound, is to copy the mono audio clip to another mono track and nudge/slide it very slightly to the right (10 - 100 milliseconds) and hard pan the 1st track left and the second track right. This will create a short stereo delay effect - the longer the delay, the wider the stereo spread will be, but the more noticeable the delay effect will be, so don't over do it. This works well for guitar for example.