I'm using the same Midi Fx that I used in Sonar X3. I got them to behave correctly by editing "MfxLookahead" in the file TTSSEQ.ini. In X3, this was located in %AppData%/Cakewalk. However, the file is nowhere to be found in the new Sonar. Is there no way to edit The Midi FX lookahead? I'm getting really bad overlapping and what seems like missing notes in looped playback when using Midi FX as it is now in the new Sonar.
 
EDIT: TTSSEQ.ini is mentioned in the new documentation....but it's nowhere to be found where it should be.

It's in your user folder: can't recall offhand but something like

C:\Users\<username>\Roaming\Cakewalk\SONAR Platinum

I may have missed out part of the path - apologies if so.

KPerry
It's in your user folder: can't recall offhand but something like

C:\Users\<username>\Roaming\Cakewalk\SONAR Platinum

I may have missed out part of the path - apologies if so.

That's the first place I looked, as per my original post. It's not in there.

Copy and paste from old installation?

Have you checked the online help?

Have you looked in C:/Program Files/Cakewalk/Sonar "your version"

https://www.cakewalk.com/...help=INI_Files.2.html#

I did all of that, guys.
 
Even weirder: After starting up Sonar this morning when I turned on my computer, the file appeared in the Sonar Platinum directory. Very strange.
 
But now, I don't think this solved my issue with missing notes in Addictive Drummer 2. Seems like it only happens when using a midi humanizer plugin on the track, which isn't something that happened in X3 with Slate Drums 4 nor Superior Drummer 2. But I see there's already a thread for that.

Did you see this one?
http://forum.cakewalk.com/Midi-Notes-Not-Playing-back-SOLVED-m3154613.aspx
 
Fingers crossed - this should help...

Yeah, I tried that. :( I tried the TTSSEQ.ini option of mfxlookahead, and setting Preferences > Midi > Playback and Recording's buffer to > 250. Neither of those worked. These MIDI effects worked just fine in X3 and my other DAW, so I know it's not my machine that's the problem.
 
I've spent since last night on it and I can't figure out why Platinum is giving me this issue. The one MIDI plugin I'm trying to use is called "Frank's MIDI Humanizer" and it's REALLY good at what it's supposed to do with some options that aren't in other humanizers, that's why I'm trying so hard to get this work correctly.
 
This issue is present with any VSTi that uses any humanizer mfx on it's MIDI track, including Cakewalk's (I tried it).
 
Without any MFX, the MIDI playback works as expected.

After further experimenting, I found that if I set the MIDI buffer in the preferences to something really high like 1500 ms that this issue is resolved. I'm not sure what changed between X3 and Platinum, but there ya go.