I own an RD2000.... nice board. Manual is awful. Below is a vid I found very helpful.
- I am unaware of any expansion capabilities/packs other than the Axial site. The RD 2000 has two spaces for for two packs. A pack is a set of sounds... can not add/remove single sounds. If you want to install another pack, you have to delete one.
- I am unaware of any capability to export sounds from your RD 2000. However, I am not sure why you would want to do this as the RD 2000 can play 8 sounds (zones) at the same time if you want, and each can be configured to play a different sound triggered/fed from your DAW. It is pretty darn powerful.
- I use Ableton DAW and have zero latency issues (I use a fairly powerful Asus Windows Laptop)
- You do not need an audio interface at all. One USB cable from your RD 2000 to your laptop can do amazing things. For mine, I have it record analog audio (a wav) to track 1, then MIDI to track 2 both at the exact same time... I then have the best of both worlds. For playback, you can play MIDI back to your RD2000, or play the analog audio (wav) file, or play both back at the same time. All using just one USB cable... and you can play along with all of that going at the same time
- It has another capability, to record a 44.1 wav file directly to a USB stick you plug directly into the back of the RD2000. Then you can play it back directly from the USB stick through your RD 2000. You can also put WAV files on the usb stick of tunes ripped from a CD or whatever, and play those back from the USB stick and then play along ..... The RD 2000 will mix the sounds. It can scroll through a list of tunes on the USB... pretty darn powerful.
Bruce in Philly https://youtu.be/aur-eSLiaWs