RSMCGUITAR

Kev999
Neither. It's due to the fact that the amp sim is a mono effect.

Amp sims are not mono effects.

 
All the ones I have seem to be mono.

Amplitube, GTR3. TH3 are all stereo.

RSMCGUITAR

Kev999
Neither. It's due to the fact that the amp sim is a mono effect.

Amp sims are not mono effects.

 
I've just checked and all the amp sims I looked at are definitely mono. They include optional stereo effects as part of a chain (e.g. chorus or reverb), but the first two stages (amp and cab) are always mono. You won't be able to pass a stereo signal through without it losing panning positions.

TH3 is definitely a stereo guitar amp sim. Maybe it is the only one. I ran a bass track and a guitar track into a single instance of TH3 one left one right, and they came out still panned left and right and effected.
 They may not be stereo in the sense that if you input a mono signal it may not be "stereo-ized" but if you input a stereo signal the two channels will be processed independently and they will retain their panoramic placement.
 
From page 24 of the TH3 manual:
WIDTH: sets the stereo width of the input channel. 0 equals to Mono, 100 to stereo and -100 to inverse stereo (swap of L and R inputs) PAN: sets the panpot or panorama position of the input channel at the output. For stereo signal it acts as a balance control: at minimum it will only pickup the left channel signal, at maximum only the right channel will be preset at the mixer output. LEVEL: the reference level of the channel. BALANCE: this control allows you to dial-in a real-time balance between the two mixer channels. MONO/STEREO: sets the output mode of the mixer. Mono merges all inputs to mono.
http://www.overloud.com/d...3-user-manual_5841.pdf

stevesweat
TH3 is definitely a stereo guitar amp sim...

 
So some ampsims are stereo? Well that's a good thing. It's certainly desirable. But the usual design philosophy seems to involve slavishly copying the hardware counterparts, including the unwanted restrictions.

UAD supplies a set of mono versions of all their plugins as well as the regular stereo set. When I compared the stereo and mono versions of their (now discontinued) ampsim Preflex, I found no difference, i.e. they were both mono!