How to make plugins active while recording?

To record the affected signal either use a send or output the track to an aux track and record the aux track. It might be a good idea to record the dry and aux track just in case.

Here is some additional information about aux tracks http://www.cakewalk.com/Documentation?product=SONAR&language=3&help=Mixing.14.html#1750199
 
To record the dry and aux track at the same time, click the record button on each track the hit the record button in the transport.

Thanx. I found this within that document. Hope it works. I think I had tried this earlier but the effected sound wasn't recorded on the aux track for some reason. Will this work for Pro Channel FX or recording the TH3 guitar plugin?
 
 
To record an audio track that contains effects
1.
Insert the desired time-based plug-in effect(s) in the effect bin on the audio track.

2.
Click the audio track’s Output control and select New Aux Track on the pop-up menu.

3.
Arm the Aux track for recording. For details, see Arming tracks for recording.

4.
Begin recording. For details, see To Record Audio.

Progress being made. I think I stumbled upon how to record the FX, AND get rid of the latency. On the aux track, simply pull the fader all the way down to mute the FX while recording. It's still present and recording but you won't hear it. I further discovered that I was able to record the built-in Pro Channel FX as well as third-party FX dropped into the FX bin. Now I can hopefully get rid of a bit of harshness as I record and not have to put an outboard EQ into the signal chain.
 
Actually, I spent some bucks last year and bought a Neumann TLM 103 and a "pro" preamp, UA LA-610 MkII, that does have some EQ tweaking ability but not in the range of vocal harshness. The UA has EQ on the extreme low end (200 HZ and lower) and on the high end (4.5khz and higher) but nothing in the middle where vocal "harshness" resides, around 1 to 2 k. I looked into trading it in for one of those even more expensive Avalons with sweepable EQs but thought I'd first see if I could tweak from within Sonar, and I'm glad I can. Hopefully the results will be pleasant to my ears.
 

Contrary to what some are claiming on this thread, the FX can be recorded if you have Platinum. Perhaps this is not the case for a lower level of Sonar but it sure works if you have the latest version of Platinum and have it up-to-date like I do. I just did some vocal recording with the harsh 2K reduced by about 10 db on track 1 and it recorded that reduced version onto the AUX track (track 2) and it came out nice. I know my voice is harsh in that range so why not fix it before it needs fixed? It's especially harsh when I sing the "Eee" sound which is in many songs. Now it's not so harsh and I don't need to tweak it much at all. A real time-saver.
 
Also I experimented with the TH3 guitar plugin and it recorded the FX on the AUX track without any glitches, and of course, you can also simultaneously record the "dry" signal as well. Thanx Sonar!