KQ Sampei Legacy

KQ Sampei Legacy

By Ryouta Kira

KQ Sampei Legacy is a multi-timbral sampler synthesizer for iOS that supports SoundFont and DLS formats for professional music production.

The App DNA

What makes this app unique?

Musicians hire this tool to manage complex MIDI files and integrate custom sound sets into mobile DAW environments, but the current deprecation status forces a transition to the newer version to maintain workflow stability.

For Music producers and mobile musicians using iOS devices who require a multi-timbral sampler for SoundFont and DLS files.

What does it look like?

Key features

Audio Unit v3 and Inter-App Audioedge

Functions as a plugin for host applications like GarageBand, AUM, and Cubasis.

Streaming Loadedge

Enables loading of sound sets exceeding hardware RAM capacity via streaming.

Multi-format Sampler Enginestandard

Supports Sound Font (sf2), Compressed Sound Font (sf3), and Downloadable Sound (DLS) formats.

How much does it cost?

paidOne-time purchase at $9.99

The $9.99 price gate provides full access to the synthesis engine and plugin capabilities, targeting professional users.

Velocity

Dormant developmentopaqueShow more...

The app has been inactive for over 10 months, with the latest release indicating that the product has been deprecated and renamed. There is no evidence of ongoing development, feature updates, or live operations. The development cycle has effectively ceased.

See all version history

Who built it?

Ryouta Kira

13+ apps tracked · Music

KQ MiniSynth LegacyKQ MiniSynth LegacyKQ Unotone 26KQ Unotone 26KQ Unotone LegacyKQ Unotone Legacyisfizzisfizzピストニア - 金管楽器ピストニア - 金管楽器KQ Audio PlayerKQ Audio PlayerKQ Voice PluginsKQ Voice PluginsKQ Dixie 26KQ Dixie 26Stereo MicrophoneStereo MicrophoneKQ Sampei 26KQ Sampei 26KQ MIDI ModulateKQ MIDI ModulateRTP-MIDI (Network MIDI)RTP-MIDI (Network MIDI)
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User Sentiment

What do users think recently?

Review voice lately leans thrilled. Users appreciate extensive keyboard support allows users to perform complex musical arrangements and handle large midi files and integration with professional sound systems enables church music production without requiring complex software setups.

How are ratings & reviews evolving?

App Store
4.89 · 19

What users say, by theme

What Users Love
  • Extensive keyboard support allows users to perform complex musical arrangements and handle large MIDI files
  • Integration with professional sound systems enables church music production without requiring complex software setups
  • Stable performance during initial launch provides a reliable foundation for blending diverse audio sounds
What Frustrates Users
  • Settings for pan and expression reset whenever the app is closed or backgrounded
What Users Want 3 requests inside

3 of 3 recent reviews analyzed · limited sample

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Competition

Competitive landscape for KQ Sampei Legacy

How's the Music market?

KQ Sampei Legacy maintains a 4.89-star rating across 19 reviews, reflecting high satisfaction among its niche professional user base. The lack of recent updates and official deprecation status signals a transition phase where the app's market position is effectively frozen.

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The rivals identified

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The Analyst's Read

Key takeaways for KQ Sampei Legacy

Where is it heading?

The product is in a terminal state following its official deprecation. The team must focus entirely on migrating the existing professional user base to the newer version to prevent churn to alternative sampler platforms.

  • Official deprecation of the product halts all feature development, which forces users to migrate to the successor version to avoid future compatibility issues.

The SWOT

Core Strengths
  • Audio Unit v3 integration enables professional plugin-style workflows
  • Streaming load mechanism allows sound sets to exceed hardware RAM limits
Critical Frictions 2 weaknesses inside
Growth Levers
  • Migration of existing professional user base to the newer version
Market Threats 1 threat identified

Next best moves

1 Sunset

Sunset the legacy app and redirect all traffic to the successor version because the product is officially deprecated → eliminate support overhead

The counter-intuitive read

The deprecation of this app is a strategic necessity…

Read the full take

Since the last report: The product's market position has shifted from a stable legacy tool to a declining asset, with increased focus on the risks of future OS incompatibility and session instability.

Bottom line

KQ Sampei Legacy serves professional musicians through robust plugin integration, but its official deprecation makes it a liability for new users, so the team must prioritize a seamless migration path to the successor version.

Unlock 2 critical frictions, 1 market threat and the analyst’s take.

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Sources

  1. [1] App Store, source

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by KQ Sampei Legacy, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The product's market position has shifted from a stable legacy tool to a declining asset, with increased focus on the risks of future OS incompatibility and session instability.

shifted

Outlook Trend

added

Future Compatibility Threat

shifted

Executive Summary Focus

Cite this report

Marlvel.ai. “KQ Sampei Legacy Intelligence Report.” Updated Aug 10, 2026. https://marlvel.ai/apps/kq-sampei-legacy

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