SparkFun Electronics

Yes.
https://learn.sparkfun.com/tutorials/si ... okup-guide

Your lack of knowledge of even the basics along with the high voltages required mean the only thing I can recommend is that you do NOT attempt this project.

The little green PCB under the gold Kapton tape is the protection circuit.

I don't know why you'd be asking here instead of at Digikey, but if you go to https://www.digikey.com/en/help/contact-us you'll find a link labeled "New Supplier Inquiries" that leads to a form you can fill out.

if you want a response from Sparkfun, then you should probably use the actual Sparkfun support page at https://www.sparkfun.com/technical_assistance.

Connecting LEDs in series does not increase the current requirement. The current requirement for three LEDs in series is the same as one LED. It increases the voltage requirement, and 3 LEDs in series will drop 3 times the voltage as a single LED. This is a user forum. If you want support from Spark...

The simplest is probably XBee. Once a module is configured, you just treat it like a serial port. The controller can transmit commands and all the pods will receive. As long as you put some type of "address" in the command, the pods will know if it should use or ignore the command. Here's a tutorial...

XBee would suit this application, but wifi modules are stupidly cheap these days. Even a Raspberry Pi Zero W would work (and they're only $10). You have an abundance of choices. You just need to pick the one you are most comfortable with and make it work for you.

Yes.

Every website on the Internet logs your IP and browser info.

You may have better luck contacting Sparkfun Technical Assistance at https://www.sparkfun.com/technical_assistance.

Almost certainly a WS2812b, or a clone thereof.

Adafruit just posted a tutorial about that at https://learn.adafruit.com/microcontrol ... n?view=all. The DAC does ogg vorbis natively, so you might want to consider converting to that format as well.

Stereo vs. mono could be an issue as well. The best thing to do is to check the test files and match their format in your production files.

There are many ways to create a wav file. Be sure to note the requirements listed at https://learn.sparkfun.com/tutorials/papa-soundie-audio-player-hookup-guide Quick Note about using WAV : The VS1000 developer library contains a simple WAV decoder, which is included in the firmware on the Papa Soun...