Read the statement by Michael Teeuw here.
Would this be possible?
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 I have the Spotify module that I love, but when I am not playing music I hate the black space in the corner where I have it located. Could I set it up so that when I am not playing Spotify music that another module shows in the space and when I play music, the module disappears? I know on the remote module I can manually hide and show modules but I want it done automatically. Can it be done? 
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 Hi, I believe you can do it with MMM-NotificationTrigger and MMM-RemoteControl. 
 i.e :
 When Spotify stops, send notification “SPOTIFY STOP”. (within Spotify module)When “SPOTIFY STOP” is received by MMM-NotificationTrigger, send “HIDE MODULE Spotify” to MMM-RemoteControl. Of course, code is not correctly written, but that’s how I would do it. MMM-NotificationTrigger and MMM-RemoteControl are pretty easy to use. FYI, I’m already doing that with news / compliments modules. When news article is made bigger by the “Article_more-details” notification, then the compliment module is hidden. 
 Once “article-less-details” is triggered, then the compliment module is shown again.Regards 
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 @bolish Thanks. I guess then I could also reverse it so when spotify plays music, it would hide the other module and then spotify would appear on my mirror. 
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 Correct. 
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 @motdog 
 Are you talking about “MMM-Spotify”?You can do it more simple way. 
 Add this into your css/custom.css#SPOTIFY.pausing { 
 display:none;
 }This could make module hiding when paused. 
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 When the boss talks… :-) 
 Indeed it seems easier as @Sean proposed if you use his new MMM-Spotify module. (Which I will try soon also).
 I’ve learnt one more thing myself.
 Thanks.
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 @Sean yep. That’s it. So if I put another module in the same spot but after it in the config, Spotify would show up when playing and when paused/shut down the other module would show up? 
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 @motdog 
 Later module will jump down when spotify is appeared.
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 @Sean after further review I am using MMM-NowPlayingonSpotify Would it work on that or do I need to install MMM-Spotify. Looks like they do the same thing, MMM-Spotify lets you control via voice if you so choose, which I don’t have set up but it shouldn’t be a problem I assume. 
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 @motdog 
 Controlling spotify on MM (besides voice, there could be many possibilities, - sensors, or any programmable condition) is difference. If you need not, nothing different.
