Subject:Normalize based on RMS Scan

Posted by: broodley

Date:8/21/2008 5:08:19 PM

Hi all,
I'm trying to set up a script to Scan a batch of files, and only normalize those about a certain RMS threshold. Started poking around a bit in the script, but can't figure out how to pass the value of the scan as a variable to tell the script to only normalize on those conditions. Thanks for any help!

Subject:RE: Normalize based on RMS Scan

Reply by: _TJ

Date:8/26/2008 1:36:21 PM

the sample script statistics.cs shows you how to get the scan for the RMS level of a file.

The basic code looks like this (note that this is a code fragment not a full script).

   ISfFileHost file = app.CurrentFile;



   file.UpdateStatistics(null);

   file.WaitForDoneOrCancel();



   // normalize only if RMS level is less than this. (in dB

   double dRMSNeedToNormalize_dB = -16.0;



   // get highest RMS level (as a ratio, not as dB)

   double dRMSMax    = 0;

   double dRMSMax_dB = 1.0;



   if (file.StatisticsAreUpToDate)

   {

      for (uint ii = 0; ii < file.Channels; ++ii)

      {

         dRMSMax = Math.Max(dRMSMax, file.GetStatistics(ii).RMSLevel);

      }

   }

   dRMSMax_dB = SfHelpers.RatioTodB(dRMSMax);



   DPF("Max RMS {0} ({1} dB)", dRMSMax, dRMSMax_dB);



   if (dRMSMax_dB >= dRMSNeedToNormalize_dB)

   {

       // "No need to normalize"

   }

   else

   {

       // "Normalize needed"

   }