Well, it's been possible to fix the below issues to some extent; from Dashboard>Settings>>> opt for new editor.
This works to some extent in that it is possible to attach a URL to the image, but it throws up alignment issues with the graphic. So for the moment I'm sticking to FireFox and the old BlogSpot editor to compile these articles.
The music streaming issue has been more successful, by adding the italicised script into the embedded routine:
<embed autostart="false" loop="false" src="http://www.URL.com/.../BlogTune.mp3" type="audio/mpeg" height="16" width="220"></embed>