Look at<div>http://www.modelsolutions.ca/</div><div>
</div><div>http://www.action-electronics.co.uk/pdfs/P100.pdf</div><div>
</div><div>No doubt others, but those I know about.  </div><div>For single sounds, look for the chips used for greeting cards.  One multi switcher could control several - they could all be mixed into one amplifier to drive one speaker.</div>