- 1). Log in to your Tumblr account to open your dashboard.
- 2). Click "Audio" from the white horizontal navigation bar.
- 3). Ensure the "Upload" tab is highlighted. Click "Browse" and go to where you have saved the song on your hard drive, desktop, or removable memory device.
- 4). Click "Open" to upload the song.
- 5). Add a description of the song or comments in the "Description" field, then click "Create post" to save and publish the post containing the song.
Source...