mix file containing missing pieces with complete file

Dear Admin and friends

I have tamil and english audios…english audio have full run time.

tamil audio some places audio is missing.i have to mix English audio ,while tamil audio missing places…

pls help me,how to mux tamil and englsih audios in one file.

thanks in advance…

Import both tracks into Audacity (File menu).
Split the Tamil track into sections so that you have a “split” each time a part is missing (http://manual.audacityteam.org/o/man/edit_menu_clip_boundaries.html#split)
Use the Time Shift tool to slide each section so that it is in the correct place with reference to the English track.
Export the finished project (File menu). Exporting will mix all tracks present in the Audacity project into one audio file.