Mastering

Mastering is the final audio processing step before distribution. It optimizes a track for streaming platforms. UnitedMasters partnered with Roex to offer AI-powered mastering directly in the distribution flow, removing the need for external mastering services.

The feature needed to work across iOS, Android, and Web with purchase parity. Each platform had a different checkout architecture: Apple IAP on iOS, Google Play Billing on Android, and Stripe on Web. The design challenge was creating a consistent purchase experience across fundamentally different payment systems.

Artists didn't understand the value of mastering or why they should pay for it within the distribution flow. The upsell felt interruptive rather than helpful. The key insight was that hearing the difference is more persuasive than reading about it, but before/after audio preview was technically complex to deliver consistently across three platforms.

The purchase decision itself had too much friction. Artists had to evaluate tier-based pricing with different options at different price points, which added cognitive load at the exact moment they were trying to finish submitting a release.

Stripe checkout on web was not customizable. We had to work within its constraints for the purchase confirmation flow rather than designing a fully branded experience. On iOS, Apple IAP rules dictated what could and couldn't appear in the purchase screen.

The feature couldn't block the distribution flow. Artists must be able to skip mastering and proceed to submission. This meant the upsell had to be positioned as an enhancement, not a gate. A feature flag controlled rollout, but we hit a browser blocking issue during the flag-based launch that required a hotfix.

Mastering in Waterfall Releases has a specific constraint: changes won't affect the original release. That required clear messaging to prevent confusion about what "mastering" means in a staggered release context.

The core revenue design decision was track selection. Artists could master individual tracks rather than being forced into an album-level purchase. Per-track pricing with toggle controls let artists choose exactly what they wanted to pay for. This reduced the purchase barrier: $4.99 for one track is easier to commit to than $24.99 for five.

Before/after audio preview is the primary conversion mechanism. Hearing the difference is more persuasive than reading about it. The preview experience had to work across all three platforms despite different audio playback APIs, so I defined the interaction pattern once (preview, compare, purchase, confirm) and adapted to each platform's native capabilities.

Upsell copy and toggle timing went through design review. The initial version showed the mastering toggle pre-selected, which felt aggressive. The final version defaults to off, letting the artist opt in after hearing the preview. The copy shifted from feature-focused ("AI-powered mastering") to outcome-focused ("hear what your track sounds like on streaming platforms").

Actual performance hit 3x the initial revenue projection. Launch day set an all-time high for single-day purchases. The per-track pricing model was the key driver: artists purchased mastering for their lead single even when they skipped it for album tracks.

Expanding mastering from iOS-only to all three platforms significantly increased the addressable artist base. Support tickets about mastering charges dropped 40%, indicating the purchase flow communicated value and pricing clearly enough to reduce post-purchase confusion.

Batch mastering for albums and EPs is the next expansion. Currently limited to single-track selection per purchase. Advanced mastering options (genre-specific presets, reference track matching) are in planning. Integration with Waterfall Releases for re-mastering capabilities.