[johnzhel]

@Michael

It doesn’t have to be “real time”. Some delay is ok. I like your idea of saving the sample locally and transmit it to the receiver board.

About the bit rate, I watch the video for this project:
http://nootropicdesign.com/projectlab/2013/07/05/realtime-adjustment-sample-rate-and-bit-resolution/

It seems 2k sampling rate still sounds ok. And I can also use a low bit, like 8bit. So, 2*1024*8= 16,384 bit per second (Am I right?)

Then, I may use this radio (radio data rate 128 kbps):
https://www.sparkfun.com/products/11018

Is this do-able? Do I miss anything? Maybe I can transmit it in real time through serial port if the data rate is 16k as calculated above? or even low the resolution to 4 bit and reduce the data rate further.

Thanks a lot for your help.

-john

[johnzhel]

@Michael 

Thank you for your reply. Sorry I didn’t mention I need to add a radio to connect two devices at the end if this direct connection experiment works.. That’s why I need to digitalize the signal. Another reason is I want to save the voice message in the memory of the other audio hacker board.

For instance, people at the other end can choose to listen to the voice when it comes or choose to save it and listen to it later.

Make sense to you?

Back to my questions:
1. How to connect 2 boards? unused digital I/O?
2. How to let the other arduino know someone push the talk button? so it gets ready to record/save or simply play.

Thanks!

[Author]

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