Speaker with push button

Cool idea.

This just popped into my head: Hallmark Cards, at least at one point in the past, sold "recordable" greeting cards.  The person buying one could take it home, record an audio greeting, then send or hand the card off as they would a normal card.  Upon receiving it the person who opened this special card would hear the greeting.

If you could find one of these, and take it apart, I'm sure that the electronics inside would accomplish exactly what you're looking to do.  It would be at minimal cost, and to customize it for your layout you could add an extension pushbutton to activate it remotely, in place of its existing card-open/close switch.

There is no provision in the Hallmark cards for recording the stadium sound effect into it via a line input, which is what the OP really should do.  The Audio quality in the Hallmark cards - if you can find one - is very poor, due to the ultra cheap microphone element and speaker they use.

The better way to record and store a sound effect for triggered on-demand playback is to get a digital recording chip kit, which I reference  in my post in this thread: 

https://ogrforum.com/...89#78860923759369489

As I note in it, you should also plan on running the audio output through a set of small computer speakers,  Those can still often be found at either garage/yard sales or --if your community does electronic device recycling-- by rummaging through the drop off piles at it.  

Look at the Big Dawgs Sound Modules for one option.  They come with a sound recorder that records the chips from your computer, you can use any sound file.

You should be able to use an ISD1700 module, there are several versions available from eBay from $5 to $15 (look the same).

This one records & playbacks for up to 60 seconds, "ISD1700 Series Voice Record Player ISD1760 Module for AVR PIC Arduino uno r3 256" is $5.32 + $1.85 shipping. You DO NOT have to use an Arduino.  Instructions and features at bottom of listing.

I used the module by itself with a separate speaker for this scratch-built Jug Band. A push button switch on the fascia of the layout to starts it, and two limit switches cycle it .

Musicians start playing at 23 seconds into this video.

Hope this helps.

Alex

Found another similar module, but 'ready-to-use': "Greeting Card Recordable Module 30 second Recording". The specifications say it will record and playback 60 seconds. It comes with a Speaker (and circuit built in, I imagine), a record button and a playback button.  Price is $4.99 + $2.66.

Alex