Auto record

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I need help detecting the amplitude from the microphone input. I have connected a telephone to mic device so that I can record voice calls. this is working manually on a button press. However i would like to add auto recording. so when the handset is lifted the amplitude input changes and I want to see the amplitude. I will put this in a ticker so that when the amplitude changes, the recording will start. I know how to start and stop the recording, finding it hard to see the amplitude. i am using mci to record and play the wav file. Does anyone know a quick and simple way to see the amplitude? if this is the best way to do it?

Posted 28-Sep-10 0:43am

pyiannakis

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Solution 1

I do not think that what you want to do is possible in MCI. I could be wrong though. :)

However, take a look at this[^] from MSDN which may give you some clues to get started.

Posted 28-Sep-10 1:15am

Henry Minute

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pyiannakis · Accepted Answer · 2012-05-02T07:28:00

The solution was to get the amps from the incoming sound. Because I was using a microphone there was a lot of background noise. Used a time frame for the amps spike and when the amps went above a set amount the recording would start. when the amps remained below the spike for a certain amount of time. I made it 5 seconds the recording stops and then I use MCI to save the recording to a predefined location.

if the recording was less than 5 seconds the application would pickup a false start and discard the recording.