Last Saturday night I recorded a live concert using a Horus with a Macbook Pro / Pro Tools 11 native and used the headphone output on the Horus.
In the first place everything went well and sounded great however all of a sudden I lost the sound in the headphones. By de- and re-connecting the Headphone output on the Ravenna Easy connect it worked again however the problem re-occured several times till my recording was interrupted

Can somebody explain why my headphone output stopped working?
Gaston