what is the code for html to embed and mp3 into my site home page so that when you go on it, it will play a mp3

These links might help you out some:

How do you code a music video?

multiple music videos

I have this embed object which plays a .mp3 file on my web

Hello Doom 2006,

Below please find a code that you can use to embed your MP3 file:

<embed src= "http://www.odeo.com/flash/audio_player_standard_gray.swf" quality="high" width="300" height="52" allowScriptAccess="always" wmode="transparent" type="application/x-shockwave-flash" flashvars= "valid_sample_rate=true&external_url=[MP3 file address]" pluginspage="http://www.macromedia.com/go/getflashplayer"> </embed>

You just have to replace [MP3 file address] with the actual address.

Hope this helps!