AnsweredAssumed Answered

High quality sound recorder and analysis tool

Question asked by Valoo on Feb 15, 2012
Latest reply on Mar 2, 2012 by BrettG

Hello everyone,


I am a bit new to the micro-controller world so I was wondering if any of you could help me in realizing my project.

I want to build a specific sound recorder. By sound I mean 24bit- 52kHz (minimum) audio in order to perform some signal treatment.

The idea is to either store raw audio signal, or sound pressure level (every second), or both.


I know I will need 24bit ADCs (delta-sigma seem to be the ones mostly used).

Should I go for a "at-least" 52kHz sample rate or should I aim at a higher sample rate ?

Will i need a "sample and hold" device or is it integrated with the ADC ?

Can a micro controller be powerful enough to calculate sound pressure level every second (20*log(Peff/P0)) ? for all 33 third octave frequency band ?

Do you have any microcontroller in mind that could suite this project ?


I am not shure I gave all the informations one need to answer my questions, but tell me if I missed any.