Hi,
Thanks for the message. Because you have ordered the Dubler USB mic you will be able to use Dubler without an audio interface (as long as your device meets our minimum specs). This is because our mic comes with its own ASIO driver allowing users to get the low latency performance needed.
If you were looking to calibrate your own mic on a Windows machine - without an audio interface -you would need to download ASIO4ALL. However, this would be different if users were using a Mac computer as they also have their own in-built ASIO driver. So users can calibrate their own mic without the need of ASIO4ALL.
In general though, the Focusrite Scarlett range of audio interfaces are good and is what we use in our office!
I hope this was helpful - let me know if you have any more questions. You can also contact us on help@vochlea.co.uk if you need anything from us!
All the best,
Josh