I'm new to Reaper and PC-recording in general (this may already be available. not sure), but here goes: Would it be feasible to have a special effect limited to a prescribed frequency band? For instance, if my vdrum module only has stereo outs and no way to directly control individual samples, I would love to be able to add heavy reverb to the snare, but not the kick drum. What if you could pick the sweet frequencies of the snare to put reverb on and only those frequencies so that my kick remains dry? You could have so much more control over the sound for those of us who are limited on gear, or for live recording with limited channels. Just a thought. I'm sure this either isn't feasible or already exists, but what the heck. Thanks again for your awesome approach, Reaper! I'm definitely buying it before my 30 days are up. It was so easy to setup with my m-audio fast track ultra usb2 interface onto my $299 acer netbook, and I'm a novice! Too kewl, man!
Look at the lowpass and highpass sliders here: (Picture may not be visible sometimes, try reloading the page) In other words, Reaverbate has a simple EQ which is good for demonstration. Low+highpass is basically what you want, cut off the kick down there and get rid of the HH... alas that works for the kick to some extent but HH and snare are something different. With a quite narrow band you lose much of both but the resulting sound is more "special FX" material. Better would be cutting off the kick with the EQ and using automation to unmute the send mute button only when the snare is on. Somewhat tedious but drums with only one stereo out has always been a PITA. Recording MIDI and sending that to a drum sampler VSTi with multiple outputs would be a way out.
Try using a gate on the drum signal. ReaGate has lowpass and highpass sliders, so set it so the gate only opens for the snare hits. Then use EQ on that signal to remove some lows and possibly some highs (the hi-hat is probably hit at the same time as the snare). But don't over use the EQ. Keep it minimal. Then send the gated, EQed signal to the reverb. Finally apply a bit of EQ to the reverb, probably rolling off some lows. And as hopi may be hinting at, you could use the MIDI out signal to open a gate to the reverb only while your snare is hit. Or, another way, perhaps have the MIDI snare note trigger a snare sample (you could re-sample the snare sound from your vdrum), then have that "fake" snare go into a reverb. You wouldn't need to hear the fake snare, just the output of the reverb, so you could set it to 100% wet.