In response to the OP, I too have wondered why the record button keeps disappearing when I route a soft synth's output as the audio channel's input. I wondered it for about 8 seconds and then just did a loop-back input to record the audio stream. There are some limitations to this, however, as ALL audio will be recorded. It's almost like the old, "What You Hear" thing in Windows. So all other tracks must be muted. OK for some things, but limiting in others. Therefore, I agree the ability to record a soft synth directly would be a valuable feature. Maybe if we
all submit a feature request, it will appear that these things will take higher priority.
ULTRABRA
Saffire 24 Pro has a loopback which allows this? How does that work in Sonar - what is the process setting up the necessary tracks?
Easy peasy. In MixControl set your loop back channels to DAW1 and DAW2 respectively. Make sure those channels are enabled and available in Sonar's audio preferences. Create a new audio track and set its input to that loop-back (either L/R/Stereo).