Echo Dot as a Switch to play music when a virtual switch is activated?

[JDRoberts]

Maybe.

IF you can have the music that you want play as part of an echo routine (not a SmartThings routine) then You can indeed have a virtual switch being turned on in SmartThings trigger an echo routine if you live in a region where echo routines can be initiated by a sensor. (As of this writing, this works in the US and the UK.)

See the following FAQ (this is a clickable link)

FAQ: Can I trigger an Echo Action without Speaking to It?

Breaking News!!! As of August 2018, a SmartThings-connected Contact or Motion Sensor can now trigger an Amazon echo routine if you live in the US, Canada, or the UK !!! Amazon has now added the ability for some sensors to trigger an Amazon echo routine (not a smartthings routine), which does let you trigger other smart home devices which are not connected to SmartThings without having to speak an echo command! Or you can set it up so that your echo devices will speak a customized phrase, play a doorbell chime, or various other sound effects. And even better, that contact sensor can be a virtual contact sensor. And although it’s a bit tricky, a community member has created an edge driver that will create BOTH a virtual switch and a virtual sensor and keep the pair in synch. So…