Analog/Digital/Analog - Real Time Audio Conversion

[Hack]

With an SX chip is it possible to take an analog audio signal (mono), convert it to digital, send it down CAT5, then convert back to analog? There are a few catches!

1) It must be real time
2) It must be high quality


If this is all possible, is it easy to then convert to stereo?


Thank you!

[JonnyMac]

I don't think so, no -- but then that depends on what you define as "high quality" (I'm speculating, but you may be able to get 10 kHz mono).  You'd need to build a custom circuit to condition the audio it, read it with an ADC (which reduces fidelity), then transmit it to the other end.  The second could be simpler: it could take the output from the RX UART and put it out on eight pins that are configured as a R-2R resistor network (simple D2A).

Just out of curiosity... why do you want to do this?  Would transmitting the signal via RF be a simpler solution?

[Hack]

In my church there is a device we use for monitoring the audio of the worship band. It's called an Aviom. I want to build something similar to that for my own personal use.

16- 1/4" inputs
http://www.aviom.com/Product-Categories-2/Analog-Input-15/AN-16-i-Input-Module

CAT5 connection to mixer unit
http://www.aviom.com/Product-Categories-1/Mixers-1/A-16II-Personal-Mixer


This is pretty much what I want to do, but on a smaller/cheaper scale.

[JonnyMac]

I think you could do a simplistic mono version as I described above, but the Prop-SX is probably not the right platform for that -- you would be better suited with the Parallax SX28 proto board as this project requires a lot of extra hardware.  I've attached the circuit I used in a project that could convert audio from an iPod or microphone to an LED display.  The scan rate was 10 kHz.

You might try the Parallax SX forums as well; there are many art-based users there that do very creative things with the SX.

[Hack]

Thanks!