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Hi,<BR>
I'd like to know how decibel is defined in the standard functions of chuck, namely powtodb and rmstodb. After what I've read so far decibel is defined as:<BR>
<BR>
20*log(soundToMeasure/referenceValue)<BR>
<BR>
Is that the formula used for these functions? And if yes, what is the reference Value here? Also, did I get the relation between the float values used for the samples of audio signals in chuck and dB right if I would measure dBs like this:<BR>
- suppose I want to get the maximum dB of an audiosignal. Would it be sufficient to look for the greatest float value in the signal, and then apply powtodb(maximumValue) to it?<BR>
- suppose I want to get the average dB of an audiosignal. Would I have to take all values of the signal, calculate the root mean square after the formula used in statistics and then apply rmstodb? But then I still don't understand why I need another function for this one. So, what is the difference between rmstodb and powtodb.<BR>
<BR>
Have a nice day<BR>
<BR>
Jakob<BR><br /><hr />Express yourself instantly with MSN Messenger! <a href='http://clk.atdmt.com/AVE/go/onm00200471ave/direct/01/' target='_new'>MSN Messenger</a></body>
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