It is possible but not via an option on one of the admin pages of a blog.
But you could alter the width via CSS commands. You could add the following CSS snippets to the style.css file of your theme.
.podpress_playerspace audio {
width:100%;
}
This will increase the width of the podPress <audio> elements to the full width of the post block. Instead of the 100% value, you could insert other values measured e.g. in pixels (e.g. 250px).
Modifying the size of the gray play botton is a little bit more difficult:
a.podpress_play_button {
display:block;
width:60px !important;
height:60px !important;
background-repeat: no-repeat;
background-position: 0px 0px;
background-size: 120px 60px;
}
a.podpress_play_button:hover, a.podpress_play_button:focus, a.podpress_play_button:active {
background-repeat: no-repeat;
background-position: -60px 0px !important;
}
In this example the size of the button is increased to 60px x 60px (the default size is 32px x 32px). But notice that background-size is a CSS 3 command. (The current versions of Safari and Chrome/Chromium should support that. But I’m not sure since which version.)
If you do not want to rely on that CSS 3 command you would adjust the size of the icon image file /wp-content/plugins/podpress/images/play_button_dyn_v4_32.png
