Stream to multiple esp32 audio from a dj mixer

[alessandrv]

Problem Description

Hello, I'm still trying to figure out the hardware needed. My idea was to use 2 esp32, one input and one output, to have the sounds that comes out from a dj mixer splitted to go both to the speakers and the esp and then to be transmitted with Bluetooth or wifi to another room where there will be the other esp but the sound from the main speakers won't be audible so no delay issues.

I'm trying to understand what module should I get for this. From my understanding for what I need using a board with a pcn5201 should work for the output esp to send it to the speakers, but I'm not sure about the input.

Please if my assumptions are wrong correct me.

Device Description

ESP32

Sketch

No code yet

Other Steps to Reproduce

No response

What is your development environment (incl. core version info)

No response

I have checked existing issues, discussions and online documentation

• I confirm I have checked existing issues, discussions and online documentation

[pschatzmann]

This is not a bug, so I am moving this to the discussions.

[pschatzmann]

You can start by using the internal ADC of the ESP32, but I recommend to use a proper audio ADC (see the Wiki).

Communications is challenging because of the limited bandwidth, so you might need to reduce the sample rate or use a codec. There are plenty of communications examples: If you use A2DP please note that there is a considerable lag!

[alessandrv]

Thank you for your reply. I saw the suggested module on the wiki, i was wondering if a pcm1802 module (like this one Aliexpress) would also work, which would cut the costs but looks also pretty decent

[pschatzmann]

In theory this should work as well, for related issues see here

[alessandrv]

Thank you again. I think I will go for now with the board in the wiki to make my tests and get it to work and maybe if I want to do other stuff similar I will try to go cheaper with those, but at least I will know how stuff works by then. Thank you again

[alessandrv]

Also what do you suggest instead of a2dp? I know vban is good can I have a receiver and sender both esp32 with that? in the examples i see mentioning using a vban receiver app rather than an esp32 so i worry this can't be done. Also esp-now i know it's quite limited in the payload sizes, how much in audio quality do I have to sacrifice?