Low Latency Monitoring and Export Audio Mix
With Low Latency Monitoring enabled, only audio tracks are included with the Export Audio Mix command—Auxiliary Input and Instrument tracks are ignored. To include Auxiliary Input and Instrument tracks, disable Low Latency Monitoring before using Export Audio Mix.

External input cannot be recorded during Export Audio Mix. To include external input in your export, it must be recorded to new audio tracks before using Export Audio Mix (see
“Export Audio Mix” on page 818).