Headphone Monitoring of Output 3 & 4 on TI2 Keys?

[kennethdel]

Is this possible? This would be a solution to monitoring via headphones without the rest of the band hearing me twiddle and noodle.

[kennethdel]

If not, I can try using 3 & 4 when I want to be heard, and 1 & 2 to monitor.