You can upload an audio file by clicking the upload button in the navigation bar. You can also upload an audio file by clicking the upload button on your profile page.

Just share the link to the track with the person you want to share it with. The link to the track can be found by clicking the share button on the track page, or in the address bar.

You can get a new link for your track by clicking the "edit track" button on the track page and click the "reset link" button.

You can update your profile settings by clicking the "edit profile" button on your profile page.

You can update your notification settings on your profile page by clicking the "edit profile" button or by clicking the "settings" link in your notifications.