Click track from 2488 won't sync with click in Sonar.

Hi. I believe that you can use audiosnap for that. Choose extract beat from chosen track.
Best of luck.

Ok watched 3 videos, back to Sonar....

Try using audio snap to extract midi. Paste it into a midi track, then sync to that midi track.

I don't know what a 2448 is... I'm assuming some kind of outboard synth/gear. If that is indeed the case you need to learn about MIDI Sync and/or Internal vs External Sync.
 
To put it simply... when you are recording/doing stuff all inside Sonar it will always sync up because it is using the "internal" clock. Once you start using outboard stuff that have their own clocks you have to "sync" it to Sonar... otherwise things will drift or otherwise go nutty. This applies to synths or things like tape/ADAT machines.
 
I do everything inside Sonar so I cannot help you beyond that but if this is indeed your problem then you gotta read up on how to sync outboard gear to Sonar. There are large swaths of the manual dedicated to this topic. It's not THAT complicated but you have to know what to set and how.
 
If that is not your problem then my apologies.
 
Cheers.

I have a Tascam 2488. It has spidf. It can also be midi synchronized so it moves with sonar now time. Start rewind fast forward. And you can use it as a catch hardware controller. The faders are not motorized, but when you move it past the current value at catches and now controls the value.

It is only 44.1. When I use it with the RME, I slave the RME to the Tascam and the Audient to the RME. This works. I generally do not midi sync. You cannot slave the Tascam to the RME via spidf. This gets me to 24 inputs at 44.1 24 bit.

You can export many tracks at once by using the insert button to select multiple tracks but they export to the fat partition in real time mono. This means exporting eight one hour tracks takes eight hours. I leave it overnight.

You can do something similar in sonar by opening project.. insert tempo change.