The Axe-Fx drivers, since you’re getting the “error when trying to open audio device: can’t create i/o buffers” message. Be sure to check the USB drivers and Firmware updates.
The optimal device type is the ASIO protocol, which is optimized for low latency and high fidelity. If this is working correctly, the test button should produce sound as you’re suggesting. Your Audio Settings should look like this:
- Audio Device Type: ASIO
- Audio Device: FAS ASIO Driver Axe FX-III (This may vary depending on your audio interface).
Additional settings may depend on your device, such as I/O and sample rate. Make sure that your device, system audio, and the NTS share the same settings (I think the Axe-Fx might be limited to 48000 Hz).
We do have some user guides on our FAQ. Nevertheless, we’re constantly updating our instructions to achieve a better user experience. We really appreciate your feedback on this matter.
Do you get the same error message when using the Plug-In version within a DAW?