Hello Pavitra, The Sound and Vibration Toolset has many powerful tools for octave analysis. Please refer to chapter 8 of the <a href="http://digital.ni.com/manuals.nsf/webAdvsearch/C31B0809E0EE1934862567B5004F30F6?OpenDocument&vid=niwc&node=132100_US";>Sound and Vibration Toolset Reference Manual</a> for more information on these VIs.
Sincerely, Jyoti F National Instruments
