Interpolation

In-Depth Explanation

Interpolation is the process of re-recording a portion of an existing song's melody, lyrics, or musical elements without using the original master recording. Unlike sampling, which copies the actual audio file, interpolation recreates the musical content from scratch, requiring only a composition license rather than both master and composition licenses.

How Interpolation Works

When you sample a song, you take a segment of the actual recorded audio. That means you need two clearances: a master use license from the sound recording owner (usually the label) and a composition license from the publisher. Both clearances are expensive and the master owner can refuse outright.

Interpolation bypasses the master recording entirely. You re-record the melody, chord progression, or vocal hook yourself, using your own musicians and your own studio. Because you are not using the original audio, you do not need a master use license. You only need permission from the composition copyright owner (the publisher) to reproduce the underlying musical work.

What You Need to Clear

To legally release an interpolation, you must secure a mechanical license for the composition. This covers reproduction and distribution in audio-only formats (streams, downloads, physical media). If you plan to use the interpolation in a video, film, or advertisement, you also need a sync license from the publisher.

The publisher can refuse permission or set any price they want. Unlike the compulsory mechanical license available for full cover songs under Section 115, interpolations are considered derivative works, which means the publisher has the right to say no.

Interpolation vs. Sampling vs. Cover

These three terms are often confused:

• Sampling: Uses the actual master recording audio. Requires both master and composition clearance.
• Interpolation: Re-records the melody or lyrics without using the master. Requires only composition clearance.
• Cover: Re-records the entire song faithfully. Qualifies for the compulsory mechanical license at the statutory rate.

Real-World Example

A producer wants to use the vocal melody from a 1980s hit in a new hip-hop track. The original label owns the master recording and wants $25,000 plus 5% of royalties for a sample license. The producer cannot afford that.

Instead, the producer hires a session singer to re-record the vocal melody over a new beat. No original audio is used. The producer now only needs a composition license from the song's publisher. The publisher agrees to a 3% mechanical royalty split and a $1,500 upfront fee.

Total cost: $1,500 instead of $25,000. The interpolation is legally cleared, and the new track can be distributed to all streaming platforms without risk of takedown.

In 2025 and 2026, interpolation became even more common after several high-profile lawsuits over uncleared samples. Major streaming platforms now actively flag interpolated content through Content ID when the melody closely matches the original composition, so proper clearance is mandatory before release.

Why It Matters for Independent Artists

Interpolation gives you access to recognizable musical elements from existing songs at a fraction of the cost of sampling. But it is not a loophole. You still need permission from the publisher, and they can deny your request or charge whatever they want.

Three rules to follow:

1. Clear before you release. Never distribute a track with an uncleared interpolation. Publishers can issue takedowns on all platforms and pursue statutory damages up to $150,000 per work.

2. Document everything. Keep written proof of your composition license, including the exact percentage and any upfront fees. Music supervisors will not place songs with interpolations in film or TV without seeing clearance documentation.

3. Do not assume small changes make it legal. Changing the key or tempo of a melody does not make it a new composition. If the melody is recognizable, it is an interpolation and requires clearance.

Read our full guide on how to clear samples in music for step-by-step instructions on securing both sample and interpolation licenses. Our music copyright basics guide covers the broader legal framework.

Use our Streaming Royalty Calculator to estimate whether the royalty split you offered the publisher is sustainable based on projected stream counts.

Related Terms

• Derivative Work - The legal category that interpolations fall under
• Mechanical License - The license required to reproduce the composition
• Composition - The underlying musical work being interpolated
• Master Recording - The audio you avoid using by interpolating instead of sampling
• Copyright - The legal framework governing interpolation rights