Sync volumes Pioneer DMH-2660NEX

[HnyBear]

How do I link the guidance and music volume so they raise and lower together? I have my guidance set to 22 which is fine while driving with my music volume at 16 usually. However when I turn the music down to like 6 the guidance volume is still at 22 which is far too loud when at a stop or early in the morning when trying to be quiet. There has to be a way to sync the volumes so they raise and lower together. Having to constantly touch the screen to adjust guidance volume while driving is dangerous.

Any help is much appreciated.

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