I’d like to see bass, organ and rhythm guitar too.

ORIGINAL: juicy

Gtr (without scripting)could be difficult as the best approach for this is sampled and time stamped,broken down snippets of actual rhythms like Virtual GTr from Steinberg.
If you sampled single notes and the placed them across a keyboard it would be very very limiting unlike a piano or organ.
If they did do it the VG way and did it better i would love it too.

I was half-kidding about guitar. Still, the Motif series does some surprisingly good arps, especially the acoustic guitars. An arpeggiated guitar like “Hey You” or “House of the Rising Sun” would be fairly easy to do. For me, distorted guitars are the hardest to pull off via VST and I avoid them like the plague.

Strings would probably be harder than guitar. (Disclaimer: I’m a pro violinist and orchestrator). For starters, they couldn’t be “played” by a string section or string player, string midi sucks and the latency due to the bow attack makes it useless. They would either have to be played on a keyboard or better yet, sequenced. The best results I get with strings: I do them in Sibelius then import the midi into Sonar. That way I can do slurs and basic articulations, then edit them in the DAW. Depending on what VST is used etc, they usually have to be slid back about a 64th note (Sonar does “ticks”). I also break up the parts into a few midi channels: one for sustained, one for spiccato etc. It’s easier and more accurate than keyswitches. At the end I overdub real strings and keep the synth strings lower in the mix.

At the end of the day, it’s voicing, range and how they react to specific samples that matters. They wouldn’t translate as well from sample to sample as keyboard parts. Toontrack: if you make a string version, I’d like to be considered as one of the makers of the midi. I’ve got some serious credentials.