To create an audio-only podcast using SoundCloud, you first need to create a SoundCloud account and sign in. Then, you select your recording device, start recording your audio, and play it back to review. If you're satisfied, you upload the recording by adding a title, description, and image. Finally, you save the recording and share the link to check that it works properly and submit it for the project. The summary outlines the key steps to create and upload an audio recording to SoundCloud in 3 or fewer sentences.