Melodyne 4 studio works great as a stand alone, but when used as a plug-in, there is no audio output when I click on a blob.  the meters register as if there should be a sound, but I hear no tone. I have a very simple 2 track project and when playing the tracks, I hear the music played as it should.  Using Melodyne 4 as a stand alone, I hear the notes played as I click on the blob. 
 
any thoughts?  I am probably missing something very simple here, but I seem to be in a creative mode, not a track this issue down mode!
-b

I have Melodyne Studio latest update (4.04 I think)
Until the latest update I could not use melodyne at all inside Sonar. With the latest update I can use it as an FX via the FX bin, but cannot use it as a Region FX - soon as I try to create a FX region, Sonar crashes. Also if I do manage to get it to work via FX bin route  but forget to mix down and delete, when I go to open the project next time, Sonar will not open - I have to open in safe and not load Melodyne.
I have been waiting for the next Sonar update to see if that improves things before starting to try and deal with Melodyne, which i don't think I will enjoy much.
Nigel
 

I am using Melodyne editor 2.1.1 (64-bit). Since reinstalling X3 onto my new SSD with Windows 10, Melodyne will insert OK into the Track FX or into the audio clip as an audio effect but I cannot see Melodyne in Region FX which is the only way that I know how to use it? It sits in C > Program Files > VSTPlugins > Celemony.

Try enabling Input monitoring on the audio track you are on. Seems like I noticed the same thing once and that solved the issue. Hope that helps!

Thanks Blogo but no different I'm afraid.

To get Melodyne as a Region FX install the VST3 format of the plug-in.

Sorry, mean to reply to bwbalint ... my bad

Are the VST3 options only available in 64-bit as I suspect cos I did uninstall everything and reinstall 64-bit options only?

petgod1
Are the VST3 options only available in 64-bit as I suspect cos I did uninstall everything and reinstall 64-bit options only?

have you changed any paths in your VST scanner ?
they should be located in: Program files\ Common files\ Vst3 \ Celemony


check this folder to make sure they are there.

I have reinstalled Melodyne Editor and made it install to Program files\ Common files\ Vst3 \ Celemony with still no luck.
Does the VST scanner scan the sub folders of your chosen file path?