that is true my values are useless i can't do anything with it...what would you suggest i use instead??

That depends on what your goal is with the sensor.

For example you could compare the analogIn value with a threshold value, when it is higher than the threshold value you enable a LED, and start a TimeOut object for lets say 1 second. To that TimeOut object you attach a function which disables the LED. That would probably be the simplest thing you can do with such a sensor, then you effectively detect if the sound is above a certain value.

my aim is simply read the output from the sensor and get the output when some sound is applied. thats all i am trying to do. i have only used this mbed for few weeks so i am not sure of the code not really experienced on coding, this is what i am using just now. and it just gives me 0.50. on teraterm. i don't know what to make of this results and it doesn't change when the sound is applied. i am pretty sure my code is not right though. if you see anything please correct me. regards

include "mbed.h"

AnalogIn ADMP(p20);

DigitalOut P16(p16); DigitalOut P17(p17); DigitalOut P18(p18); DigitalOut P19(p19); DigitalOut P15(p15);

Serial pc(USBTX,USBRX);

int main() { float audio;

while(1){

audio = ADMP. read();

Serial pc(USBTX,USBRX);

printf("Audio = %5.2F dB\n\r",audio);

wait(0.5); } }

0.5 could be possible, but if you make enough sound (or just with your finger tapping it), it should move to something else than 0.5.

Btw code tags make your code easier readable <<code>> and <</code>>

does my code look ok.

Start with <<code>> on a seperate line, end with <</code>> again on a seperate lane.

Your second definition of Serial pc makes no sense (from your while(1) loop). Besides that it should work, not very useful, but it should function. Tap it with your finger and I expect you see other values.

i changed few things in my code and the value does go up now,pretty random but its something. that serial pc is meant to be a a comment. i am still learning. thanks for your help. much appreciated regards