I know this has been asked before but I did not see much in specifics.
Is it feasible with a Arduino Mega to record 1 channel of audio at 4kHz, or possibly 8kHz straight to SD card?
Or possibly over Wi-Fi or X-Bee?
I'm hoping to do that as well as record some other channels from a couple of A/D channels
at 100Hz on a MCP3208 12-bit ADC. I've done this part and send it to processing over serial, but not to an SD card yet.http://ww1.microchip.com/downloads/en/devicedoc/21298c.pdf
Is this project feasible? I know the Arduino is not the best fit for the job but I don't really want to jump
into a PIC or Beagleboard quite yet.
I could in the future get away with a rectifier/RMS circuit to get something akin to SPL.
But it would be hard to get there without first hearing/analyzing the audio to determine the frequency range.
I want to use a contact microphone using a Meas PVDF sensors.http://www.meas-spec.com/downloads/DT_Series.pdf
Alternatively, I could record the audio on my laptop, and integrate everything with Processing, but that will make it very cumbersome being tethered like that. I want to keep this small and portable.
So, essentially I think I have a few questions that I'll list more directly below. FYI, I'm a decent programmer, but am a novice at the electronics.
1. Is the arduino Mega capable of doing the audio capture and writing to the SD card with the MCP3208?
2. Could it be done with WiFi or Xbee?
3. What is a good option for creating the gain necessary on the pvdf sensor?
4. What is a good tutorial or some suggestions for creating simple circuits for making the low-pass/high-pass filters for this setup?