I just switched from an iMac to a MacBook 14 inch. I've swapped out my iMac with a Samsung HDMI monitor with a speaker, and it plays sound correctly. However, the volume slider is disabled. I could fix this with Proxy Audio device, as it routed the sound through a volume-changing-compatible device to the monitor. However, when I unplugged my MacBook to go places, I had to change my sound output back to the internal speakers because the Samsung monitor was no longer attached. Then I tried creating a multi-output device with both the monitor and built-in speakers, but the monitor had enough lag that it was nearly impossible to listen to anything with the monitor making a louder echo of the MacBook (which I keep in a vented cabinet with a dock).
So this is my request - can I have my Mac switch to my monitor speakers, with full volume control, when I plug in my monitor, then switch back to the internal speakers when I unplug the monitor? Finally, if this cannot be done for free, I'll just switch the output myself every time I leave or consider using the macbook's internal speakers. Thanks in advance.