How to send only certain notes to a delay - headscratcher

you could mute all the other notes, then bounce the delay bus, or bounce the synth with the other notes muted and send that to the delay bus.  either way, you'd want to keep the original synth sound out of the bounce
 
Possibly you could use a midi delay, or just replay the notes more and more quietly to make something like a delay.

Is it an audio or midi track?  if it's a midi track, it may not take that much effort to create a copy of the midi and just select the few notes you want to keep to paste into new track?

Sharke, personally I just make a copy of the track, it gets the job done and is easy enough.  I usually name the track something descriptive like Synth1 MD.
 
I make copies of tracks, to effect sections with different effects or more track editing when it is required.  I often send them all to a buss for compression and further effects.  But that's just how I do it.
 

dubdisciple
Is it an audio or midi track?  if it's a midi track, it may not take that much effort to create a copy of the midi and just select the few notes you want to keep to paste into new track?

It's a MIDI track. Yeah it wasn't that much effort to copy the MIDI over to a new track. It just meant another instance of Prism, which can be a fairly CPU heavy synth.

Not sure if this is possible but....

Is there a way to use a step sequencer to turn on and off the delay on the notes you require? Obviously you may have to create multiple patterns to get the job done?

Or possibly record automation of the on/off of the delay? or dry/wet.

If you are using Rapture or DimPro and are only relying on one single element, then you could set it to Multitimbral mode and copy & paste the element setting to Element 2 and add the synth's own built-in delay effect.

 
Or Lo/Hi Key to create zones in each Element without using multitimbral and MIDI channels.  If the notes are in a narrow range, it may only take 2 or 3 Elements.  If they're isolated and scattered, you may need a few more copy / paste operations, plus the key range adjustments.  In .sfz, it'd only be a few lines of text.

I"m not on X3, but I've never had that particular problem.  It seems the effect isn't being allowed to finish out, which doesn't make sense to me.  In my old dinosaur version of 7PE, you could "play tails", but that typically was when you stopped the song and the tails of effects would still play out.
There seems to be something else happening that is preventing that in your scenario, as you ought to be able to have an automation envelope, to control your delay send, that doesn't cut off the effect, when it is back to zero again... MIDI or audio....either or...


Having two instances of a VSTi, doesn't seem like the solution, as like you said, it eats up available CPU.

MIDI option 1: Put the notes in a separate track and use the MIDI delay plug-in.
MIDI option 2: Create a number of tracks equal to the number of repeats you want. Copy the notes and paste in one track, then paste and offset in the next track, paste and offset in the next track, etc. Change velocities on the subsequent pastes then bounce them all together. Con: Takes more work. Pro: Sometimes you can get really cool delay effects if the velocity level changes rather than the output level...depends on the patch. This also allows for polyrhythmic echoes.
Audio: Split the clip before the notes you want to echo, then insert a delay effect in only the clip with the notes you want to echo. Note: if the delay tails need to extend beyond the clip, you'll need to lengthen the clip for the duration of the delay you want reproduced.

Anderton
MIDI option 1: Put the notes in a separate track and use the MIDI delay plug-in.
MIDI option 2: Create a number of tracks equal to the number of repeats you want. Copy the notes and paste in one track, then paste and offset in the next track, paste and offset in the next track, etc. Change velocities on the subsequent pastes then bounce them all together. Con: Takes more work. Pro: Sometimes you can get really cool delay effects if the velocity level changes rather than the output level...depends on the patch. This also allows for polyrhythmic echoes.
Audio: Split the clip before the notes you want to echo, then insert a delay effect in only the clip with the notes you want to echo. Note: if the delay tails need to extend beyond the clip, you'll need to lengthen the clip for the duration of the delay you want reproduced.

 
I've actually been having great fun with #2 since last night. The creative possibilities are much better than just using a conventional delay setup. For instance, you can apply a delay to the second track that's not necessarily the same time value as the gap between the first and second lines. So the second track might be offset an eighth note from the first, but you apply a dotted eighth delay to the second track. Or anything you want. Also, you don't have to treat the second track as a "delay" at all times. At select parts you can use it to harmonize the first track. Or you can make the notes of the "delay" slightly different, e.g. apply a little flourish or ornamentation to a chord that's in the first track. If you have both tracks up on the PRV and lock one of them, it's really easy to compose intricate lines that delay, ornament and interweave with each other. And since the "delay" track is a whole new instance of the synth, I can mess with the patch a little bit to get a different sound. For instance since I'm using Prism, I can apply a little feedback to the second track, or mess with the attack or impulse settings. From initially just wanting to apply delay to certain notes, I'm now weaving two separate but related lines around each other. I love how technology inspires creativity like this.