At some point a couple weeks ago, I lost the ability to hear Midi Tracks. The meter shows it is playing but there is no sound. When I Bounce to Track(s), converting Midi to Audio, There is negative output, No Audio, can't see anything or hear anything.
I can hear TTS-1 Piano & CakewalkSoundCenter. And convert them both to audio.
Its just the Midi tracks I am having issues with.
I am using a PreSonus AudioBox iTwo and have all the sound going through it. Even when I put the sound on my laptop back to the default speakers, still cannot hear Midi.
Please advise.
NOTE: I only work on this program on my weekends (Sunday and Monday)

I have followed the KB and still have this issue when I am on MME or WDM Drivers.

BTW, I have uninstalled all Cakewalk Products with Revo. 
When I went to reinstall Music Creator, it detected a previous version.
So, I deleted everything related to cakewalk in the registry.
Then got a fresh install.
Still cannot hear Midi or Convert to Audio.

Welcome to the forum.
When not using TTS-1 and Sound Center, what synth are you using for MIDI (what are the MIDI tracks's outputs set to)?
 

When I go to Insert, MIDI Track
I am using the same outputs as the other tracks. Midi Track Outputs are set to the AudioBox
Using any of the Default Patches such as Acoustic Grand Piano, Violin, Pad 2 (warm), etc. I see the meter go up/down but no sound.
Could it be something wrong in the Registry?

My guess is the MIDI tracks at one time were playing through the Microsoft GS Wavetable synth. Then the iTwo was added and now the tracks are going out to the iTwo which does not have any way to produce sound from the MIDI data. The best solution is to route the MIDI tracks to TTS-1 and add audio tracks to handle the TTS-1 output.

Thanks, I'll check on that next weekend

You should also try a clean uninstall/reinstall of the Audiobox driver software.

swfred_2000
When I go to Insert, MIDI Track
I am using the same outputs as the other tracks. Midi Track Outputs are set to the AudioBox
Using any of the Default Patches such as Acoustic Grand Piano, Violin, Pad 2 (warm), etc. I see the meter go up/down but no sound.
Could it be something wrong in the Registry?

The OP has been silent for some time, but still...
Why don't you start simply by Insert>Softsynth. Every MIDI track needs a soft synth to be audible, anyway.
That way you get all routings created automatically.
Setting the output of a MIDI track to the Audiobox isn't fruitfull, because MIDI does not contain any audio. You are using the default patches of which synth?? GS Wavetable? If so, forget it, and use TTS-1 or any others you have.