MasteringOne (the "Service") is operated by Myblin9 Co., Ltd. (주식회사 마이블링), a company registered in the Republic of Korea, business registration number 390-87-03880, with its registered office at Gangnam-daero 107-gil, Seocho-gu, Seoul, Republic of Korea. In these terms, "we", "us" and "our" mean Myblin9 Co., Ltd.

MasteringOne automatically masters audio files you upload and returns the mastered file together with a report describing what was done.

The Service does not guarantee commercial success, acceptance by any distribution platform, or any particular level of audio quality. Mastering cannot repair problems introduced at the mix stage, and the quality of your source file sets the ceiling on the result.

You must own or have the right to use the audio you upload. Do not upload files that infringe anyone else's rights.

You are responsible for any copyright dispute arising from what you upload. The Service is not a party to such disputes.

You retain copyright in the mastered result, as the rights holder of the original work. We claim no rights in your audio or in the master.

Up to 350MB and 15 minutes per file. Supported formats: WAV, FLAC, AIFF, MP3, OGG.

Unlimited plans are subject to a fair-use limit of 20 tracks per day and 300 tracks per month. This is set well above normal individual use; it exists to prevent resale and automated bulk processing.

Exceeding these limits, or reselling or brokering the Service, may result in restricted access.

Your uploaded original and the mastered result are stored so that processing and download can be provided. They are deleted promptly if you ask us to delete them.

Files may be deleted automatically after a period of time. Please keep your own copy of any master you download.

We may change or improve the Service's features. Material changes that disadvantage paying customers will be announced in advance.

The Service may be temporarily unavailable due to circumstances outside our control, including infrastructure failure and outages at third-party providers such as payment or hosting services.

We are not liable for indirect or incidental damages arising from use of the mastered result.

Our total liability to you will not exceed the fees you paid in the preceding three months.

Payments are processed by Paddle, acting as Merchant of Record. Paddle is the seller for each transaction and issues receipts and tax invoices.

Card details are handled entirely by Paddle. We never collect or store them.

Refunds are covered by our Refund Policy: a full refund within 14 days of purchase, no conditions.

Subscription plans may start with a 7-day free trial. A payment method is collected when the trial starts, and the first subscription fee is charged automatically when the trial ends unless you cancel before then. You can cancel at any time from the link in your Paddle receipt email or by emailing us; cancelling during the trial means you are not charged. Paddle sends a reminder email 3 days before the first charge.

Questions about the Service: support@masteringone.com