Gradient?s parameters:

Create Hi-Tech mp3 player interface in Photoshop CS

Make a copy of the new made layer and make use of Free Transform option to make it smaller a little. Choose the parameters indicated in the next steps:

Create Hi-Tech mp3 player interface in Photoshop CS

Blending
Options-Gradient Overlay

Create Hi-Tech mp3 player interface in Photoshop CS

Gradient?s parameters:

Create Hi-Tech mp3 player interface in Photoshop CS

Blending Options-Stroke

Create Hi-Tech mp3 player interface in Photoshop CS