Tip: How to restore playback if tracks cannot be un-muted

Question

Problem: No sound output because all software instrument tracks are locked in muted position (M-box flashing).
Solution: Open Mixer, select “All” and then un-solo all auxiliary buses. This should automatically un-mute all software instruments tracks.
LPX. Mavericks. Relatively new user. Here’s how I created this problem: Had been alternating between track and mixer views to isolate and adjust various effect and instrument settings on several tracks. Ultimately returned to full track view to evaluate total mix but discovered that all software instrument tracks were locked in mute position even though none of them was soloed. Went back to Mixer and found that one of the auxiliary buses was still set to solo. Un-soloing that bus automatically un-muted all software instrument tracks and restored normal playback.
Lesson learned:  Soloing an auxiliary bus affects playback exactly the same as soloing one or more software instrument tracks. Any software instrument track that is not being soloed will be locked in mute position if any auxiliary bus is in solo position.
Question: Is there a way to easily see that an auxiliary bus is soloed in track view when mixer window is not visible? 

Answer 1

Grandpa Adams wrote:
Question: Is there a way to easily see that an auxiliary bus is soloed in track view when mixer window is not visible? 
The mute buttons should be blinking if this is the case.  Instead of trying to hunt it down, or opening the mixer, you can hold Option and click any solo button (solo's everything), then keep holding Option and click solo again (unsolo's everything).