🚀 go-pugleaf

I still see a white background when I click on a MIDI file link.

Unless you place the MIDI file in a web page (such as with EMBED SRC), you cannot control how the MIDI player plugin will display in the browser. Look at the zianet.com page linked above for an example. The directory web page is black (with text and graphics) and plays 'Hold on to the Night' in the background because it is embedded in the HTML.

If you want to control the appearance, you need to create a new HTML page for each MIDI file.

Example:

Create a new file called 'The_Fields_of_Athenry.html' and use the following example HTML...

<html><head>
<title>The Fields of Athenry</title></head>
<body bgcolor="black">
<EMBED SRC="http://www.goldenumber.co.uk/beermatts_trumpet_pages/midis/The_Fields_of_Athenry.mid" AUTOSTART="true" HIDDEN="false" Width="145" Height="24">
</body>
</html>

Link to this HTML file instead of the MIDI file.