Why do Reaper and iZotope RX freeze playback when TD is runniing?

Beginners
1

I’m stumped as to why I’m having this problem.

I’m pasting my post from the Reaper forum here, just in case anyone has any advice…

Here’s what happens:

This is a test with a fresh install of both Reaper and TD - no MIDI communication between the two, no LoopMIDI, no Rearoute – both programs are in their ‘vanilla’ state. I’m using my Komplete 6 ASIO driver in Reaper (TD doesn’t have a driver ‘choice’, but rather sees everything in the system, and you then choose what to interact with via its nodes - since it’s really a programming environment much like Max). [I wonder if this has anything to do with the issue?]

So, in a nutshell: if TD is running (as in the program is running - doesn’t matter if it’s in ‘play’ or not), then Reaper’s playback freezes. the way to unfreeze it is to stop playback in TD, stop playback in Reaper, then start TD, then start Reaper… then the same things happens again.

I’ve tested against: Ableton, Bitwig, Audition and iZoptope RX10.

Interestingly, RX also freezes playback in a similar manner, whereas the other three are fine.

What to make of all this?!

I’m really interested to know if this is a problem specific to my system or whether anyone else can replicate the issue. If this is a ‘real’ problem, I’m amazed that nobody’s noticed… in fact, it would be impossible for anyone to actually use Reaper with TD, so I would have thought it would be a known issue… yet I see examples of people (well, at least one guy on youtube) happily working away with Reaper and TD.

2

Follow-up:

It seems if I’m ‘careful’, i can get by like this:

STOP playback in TD before making any changes, both in Reaper and in TD.

START playback in TD, start playback in Reaper… runs fine, no freezing.

In essence, avoid making any live changes. Which seems to go against the ethos of TD completely, but for now, actually suits me fine because I’m creating time-line sequential music videos.

[EDIT]
Ahh… I spoke too soon: still occasional freezes are happening. However, what does seem to work is following the above approach AND turning off Realtime in TD.
Seems like maybe Realtime causes an aggressive ‘hostile takeover’ of the audio driver in Reaper (but not in other programs like bitwig/ableton/audition, despte using the exact same ASIO driver ??)