Control Audio Source

For some reason my Sony Bravia 9 and Quad Theatre don't always default to audio through the audio system. i have added the folwing lines to my activity macros

Delay|2000!
AV|8~Remote~OPTIONS!
Delay|300!
AV|8~Remote~Down!
Delay|300!
AV|8~Remote~Down!
Delay|300!
AV|8~Remote~Confirm!

it works fairly well but I was wondering if there is a better way to do this.

What device is AV8? ie: what are you controlling - the TV? Is there a native command in the driver to execute what you need?

Yes it's a TV. There is no native command that I've found. The options command tekes me to an audio menu where there are 2 choices - TV Speakers or Audio System.