How to show differents logotypes by category

Sorry for my english, i’m trying to show differents logotypes by category. For exemple: when the visitors are viewing the frontpage, it will show one type of logo, but when they are in “music” category, it should show a different logo.

I tried to insert this code:

<?php if (is_category(‘musica’)) { ?>
“><img src=”https://www.whatsgoingon.com.br/wp-content/uploads/2012/10/logo-musica.jpg&#8221; <?php if ($omc_logo_image === NULL) { echo(‘height=”96″‘); }?> />
<?php } ?>

but it still showing the principal logotype and the “music” ones. How could i delete the “principal” logo from the category “music”?

you can see what is happening here:
https://www.whatsgoingon.com.br/category/musica/

thanks =D