This doesn't help, because I've forgotten my password too!
If you need to reset your password but have forgotten the email address attached to your SoundCloud account, please follow the steps below:
1. If you have connected your Facebook or Google+ account to your SoundCloud account, then you can try to sign in with the 'Sign in with Facebook/Google+' icons to regain access.
3. Search each of your email accounts for messages that come from firstname.lastname@example.org