the best/easiest way to embed 20MB of audio (.wma) so that readers can stream it (instead of download) from a blog post is www.soundcloud.com

Media

Audio » SoundCloud Audio Player

SoundCloud lets you move music fast & easy. The platform takes the daily hassle out of receiving, sending & distributing music for artists, record labels & other music professionals.

SoundCloud supports the uploading of AIFF, WAVE, FLAC, OGG, MP2, MP3, AAC, AMR and WMA files.

To embed SoundCloud groups or member track playlists or a single track in your blog explore the SoundCloud website and or use the search to find a sound that you like.

Once you have located a song to embed, look for the Share button. If a track doesn’t have this button you you will not be able to play it outside of the SoundCloud web site.

After clicking the Share button, click WordPress.

Copy the shortcode or click the link to customize your player. If you choose to customize, a new box will popup allowing you to set a color and a few other options. When the customizations are complete, copy the shortcode.

Paste the shortcode into a new/existing post or page on your blog and away you go!

Manual Customization

If you would like to manually customize the shortcode you can do so with the following options.

The “params” parameter will pass the given options on to the player widget. The player accepts the following parameter options:

auto_play = (true or false)
show_comments = (true or false)
color = (color hex code) will paint the play button, waveform and selections in this color
theme_color = (color hex code) will set the background color

Here are some examples:

This is how the player looks when only the basic url parameter is given.

[soundcloud url="http://soundcloud.com/djjunior/junior-top10-april-enjoyment-mix"]

[soundcloud params="auto_play=true&show_comments=false" url="http://soundcloud.com/forss/flickermood"]
Embeds a track player which starts playing automatically and won’t show any comments.

[soundcloud params="color=33e040&theme_color=80e4a0" url="http://soundcloud.com/forss/sets/live-4"]
Embeds a set player with a green theme.

[soundcloud height="150" width="250" url="http://soundcloud.com/groups/experimental"]
Embeds a group player with 150px height and 250px width.