alarm setup

I’m going to attempt to set up an “alarm” in an effort to solve my issue with my 1 ½ week old Sonon Port that stops playing music when my amp shuts off then turns back on. If I see it correctly, I can set the start time of the alarm, set the duration of the alarm and select the input audio for the alarm. So I should have music from the Sonos library(alarm source), playing at my alarm start time of 1030am until my 10 hour duration is up. Correct?

Here’s the current setup. The Port is connected to the internet via a Cat 5 cable. I’m streaming music from the Sonos app. The Sonos Port outputs to a Shure mixer. The Shure mixer outputs to a QSC CSX 800V amplifier that drives 5 Episode all-weather  70 volt speakers. The speakers provide sound at our large community swimming pool. The music has to be off between the hours of 9pm and 1030am, community rules. I saw no way to turn the Sonos Port, the QSC amp and the Shure mixer off then back on with some setting feature. I put a mechanical timer on the A/C power line for the amp that shuts it off then back on during these times.The Port stays on and the mixer stays on, all the time. So one will hear music playing from the Port right up until the amp A/C power is switched off by the mechanical timer. The next morning, the amp turns on at 1030am. The mixer is still on and the Sonos Port is still on. They were never shut off. There is no music! I get phone calls from the people who frequent the pool to please come and fix it. The fix is driving my golf cart to the pool and getting close enough to get on the same network as the Sonos. I have to open the Sonos app, tap the music playing box, select a streaming source and press the play button. MUSIC!  I’ve had to do this every day since the Port was installed.