I can't answer you that question but them being a real company the need to ask permission when they want to use anything or stuff like that.
Plus sound Engine in DCS isn't the greatest but it does it job.
All we can do is just wait and see what they will come up with
Hey cobra I don't know if you guys noticed but there is a ambient engine sound when you spawn in Viggen from Coldstart.
Lilke the engine is turned on even tho it isn't.
Think this might be a bug
Mode to ANF
Selector to ATTACK
Weapon USAFE
Look at your gun sight change
Aim towards the ground, wait for horizontal line to reach the 2 lines and stop blinking
Fire
Pretty accurate for me when it comes down to rockets
I really don't like the default Su-25 Sounds that Viggen uses so I went and gave it a little makeover.
Something similar what Mirage has atm but it's little more limiting of what I can do since it doesn't have that many definitions made already.
I have a little weird bug that happens to me when I spawn as Coldstart Viggen I can hear the engine running in the background even tho the aircraft is not turned on.
Not sure if you will experience this as well but oh well.
JSGME & OvGME Ready
Download link: https://www.dropbox.com/s/id1nmp73kteknd1/Sounds%20~~%20AJS-37%20Viggen%20External%20Sound%20mod%20%26%20Internal%20loop%20Sound%20fix%20%28Rlaxoxo%29.rar?dl=0
Enjoy