Report updated Apr 28, 2026

Overview · Full Intel report in progress

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SOLO [Nr.19] is an established music app that is completely free. With a 4.4/5 rating from 7 reviews, it shows polarized user reception.

What is SOLO [Nr.19]?

SOLO [Nr.19] is a digital implementation of Karlheinz Stockhausen’s 1966 composition for melodic instruments and feedback systems. The app automates the complex analog setup traditionally requiring four technicians, allowing a single performer to execute the piece's polyphonic requirements. It includes reference recordings by Enrico Francioni and Simonetta Sargenti for study and performance preparation.

Current Momentum

v2.2 · 55mo ago

Zombie

Last updated 1667d ago. 5 versions tracked.

AI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.

Competition

Rivals identification in progress

7-Day Rank Pulse 🇺🇸

Music

No ranking data

MusicGrossing

Rating Pulse 🇺🇸

What makes this app unique?

What Does It Look Like?

How Is The App's Momentum Right Now?

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What Are The Key Features?

Digital Feedback SystemStandard

Replicates the original analog feedback setup required to create polyphonic music from a single melodic instrument.

Technician AutomationStandard

Digitally performs the work of four technicians across all six versions of the composition.

Reference RecordingsStandard

Provides high-quality performance examples by Enrico Francioni on contrabass and Simonetta Sargenti on violin.

How much does it cost?

Free

Analysis in progress, available soon

What do users think recently?

Analysis in progress, available soon

Analysis in progress, available soon

What is the competitive landscape for SOLO [Nr.19]?

How's The Music Market?

Market outlook for this category

Available very soon

Strategic analysis coming soon

SWOT, key takeaways & outlook

The outtake for SOLO [Nr.19]

Key Takeaways

This is a specialized utility designed exclusively for musicians performing Stockhausen’s Nr.19, replacing the need for a traditional four-person technical crew.

Where Is It Heading?

Trend analysis

Available very soon

Disclosure

Independent intel to help builders create better apps.

AI-powered analysis with editorial review, built from publicly available sources. See methodology.

Marlvel.ai is not affiliated with, endorsed by, or sponsored by SOLO [Nr.19], its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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Cite this report

Marlvel.ai. “SOLO [Nr.19] Intelligence Report.” Updated Apr 28, 2026. https://marlvel.ai/intel-report/music/solo-nr-19

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