--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Extrack: Stem Separator, Chord" developer_entity: "Yamaha Corporation" bundle_id: "jp.co.yamaha.mc.Extrack" app_store_id: "6504546276" category: "Music & Audio" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-07-27" report_date: "2026-09-04" last_verified: "2026-09-04T00:00:00.000Z" report_version: "1.1.9" total_reviews: 128 overall_rating: 3.2 sentiment: "Frustrated" sentiment_score: 35 confidence: "medium" confidence_score: 0.45 top_praise_theme: "Stem separation technology provides high-quality audio isolation for drums, vocals, and bass tracks" top_complaint_theme: "Frequent application crashes during playback and file loading prevent consistent use across mobile platforms" review_sample_size: 30 total_review_count: 30 analyzed_review_count: 30 data_age_days: 32 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["music & audio", "freemium", "frustrated sentiment", "mobile app", "app review", "app analysis", "instrument", "players", "vocalists"] canonical_url: "https://marlvel.ai/apps/extrack-stem-separator-chord" license: "CC-BY-NC 4.0" content_version: "v2" --- # Extrack: Stem Separator, Chord Intelligence Report ## TL;DR {#tldr} - **Category**: Music & Audio · Freemium - **Signal**: Rating 3.2 · Sentiment Frustrated - **Recent focus**: Frequent application crashes during playback and file loading prevent consistent use across mobile platforms (top complaint) · Stem separation technology provides high-quality audio isolation for drums, vocals, and bass tracks (top praise) > **TL;DR:** Extrack: Stem Separator, Chord is a music & audio app by Yamaha Corporation, rated 3.2/5 by 128 users, with Frustrated user sentiment (35/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Extrack: Stem Separator, Chord faces Frustrated user sentiment (3.2/5 from 128 reviews), with users reporting frequent application crashes during playback and file loading prevent consistent use across mobile platforms as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.2/5 (128 reviews) | | **User Mood** | Frustrated | | **Category** | Music & Audio | | **Developer** | Yamaha Corporation | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 32d | ## Metadata & Market Performance - **Publisher:** Yamaha Corporation - **Category:** Music & Audio - **Target Audience:** Instrument players and vocalists seeking practice tools to isolate parts and learn songs by ear. - **Platforms:** iOS & Android - **Version Reviewed:** 1.1.9 - **Report Date:** 2026-09-04 - **Signal Count:** 30 reviews analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 6504546276 - **Bundle ID:** jp.co.yamaha.mc.Extrack - **Google Play ID:** jp.co.yamaha.mc.Extrack - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-09-04 - **Short Description:** You'll feel like you're playing with the actual artists — with the Yamaha app. ## Executive Snapshot **What it is:** Extrack is a music practice app for instrumentalists that isolates audio stems and displays chord progressions on iOS and Android. **Why users hire it:** It removes the need for an active internet connection during practice sessions, allowing users to work with their own music library locally. ## App DNA (Features & Intent) - **[Differentiator] Stem Separation:** Splits audio files into individual instrument tracks for independent volume control. Core utility feature driving acquisition. * *User Intent:* Users want visibility into their own performance and progress. - **[Differentiator] Chord Analysis:** Automatically detects and displays chord progressions with visual finger placement guides. Retention loop increasing session frequency. * *User Intent:* Users need clear guidance to understand and adopt the product quickly. - **[Standard] Playback Controls:** Adjusts tempo, key, and loop sections for specific song segments. Retention feature encouraging daily active usage. * *User Intent:* Users are motivated by consistent progression and daily incentives. ## Market Position {#market-position} Extrack occupies a niche in the Music & Audio category by focusing on local, offline-first stem processing. The 3.06-star rating across 128 total ratings suggests that while the core technology is effective, the lack of file export and persistent crash reports limit its competitive standing. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free tier with basic functions, Subscription tier for advanced features - **Analysis:** Freemium model gates advanced functionality behind a subscription, while basic stem separation and chord analysis remain free. ## 🔴 User Sentiment (Medium Confidence: 30 of 30 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.2/5 - **Platform Split:** iOS 3.8/5 (24 ratings) | Android 3.1/5 (104 ratings) - **Overall Sentiment:** Frustrated ### Top Praises - **Stem separation technology provides high-quality audio isolation for drums, vocals, and bass tracks** - **Local processing capability allows users to extract stems and play tracks without an active internet connection** ### Top Complaints (Impact Areas) - **Frequent application crashes during playback and file loading prevent consistent use across mobile platforms** ## SWOT Analysis {#swot} **Core Strengths:** - Local processing removes connectivity dependency **Growth Levers:** - Export functionality would unlock professional workflows ## Recent Changes (v2 → v3) {#recent-changes} The app's competitive standing remains in a maintenance state, with no functional updates addressing the critical lack of file export or playback stability. The primary shift is a more urgent framing of these gaps as threats to professional user retention. **Overall trend**: Mixed **Compared at**: 2026-09-04 ### High-impact changes - **[Shifted] Market Outlook Trend** (positioning) ### Medium-impact changes - **[Shifted] SWOT Categorization** (swot) - **[Shifted] PM Action Item Reasoning** (positioning) ## What's New - **Latest (v1.1.9, 1 months ago):** Introduced in-app service announcements, iTunes Store deep-linking for missing tracks, and a filter to display only analyzable songs. ## App Momentum (Maintenance) {#momentum} - Ships minor utility updates periodically. - Last major release July 2026. > **Cadence:** 1 total versions · 1 majors in last 6 months · 44 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Extrack: Stem Separator, Chord is a music & audio app that is free with in-app purchases. With a 3.2/5 rating from 128 reviews, it faces significant user friction. > **Bottom Line:** Extrack possesses high-quality stem separation technology, but the lack of file export and persistent stability issues prevent it from becoming a professional-grade practice tool. Prioritizing stability and export functionality would transform the app from a casual utility into an essential musician's workflow. **Best for:** Instrument players and vocalists seeking practice tools to isolate parts and learn songs by ear. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship file export functionality because it is the top-requested missing feature → unlock professional user retention ### Outlook: Mixed The market for music practice tools is shifting toward integrated, export-ready workflows that allow users to move stems into external production environments. Extrack remains exposed due to its maintenance-mode cadence and lack of file export, which risks ceding the power-user segment to rivals that offer more flexible, albeit cloud-dependent, workflows. - 🔴 Persistent playback crashes during the latest release cycle erode the daily active habit, which compounds the rating drag already visible on Android. - 🟢 The offline-first stem separation technology provides a unique value proposition that continues to earn praise despite the current stability complaints. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.2/5 | | Total Reviews | 128 | | Sentiment | Frustrated (35/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Extrack: Stem Separator, Chord** (this app) | 3.2/5 | Frustrated | Yamaha Corporation | | [허밍업 - 노래, 음정, 발성](https://marlvel.ai/apps/com-hummingup-voice-android) | 4.5/5 | N/A | Humming LLC | | [04 Limited Sazabys 公式アプリ](https://marlvel.ai/apps/com-fourlimitedsazabys-sp) | 4.1/5 | N/A | Fanplus, Inc. | | [320 FM](https://marlvel.ai/apps/320-fm) | N/A/5 | N/A | iRadioService | | [432 Radio: 432hz/528hz Radio](https://marlvel.ai/apps/com-appums-music_pitcher_radio) | N/A/5 | N/A | Appum Studios | | [50 Easy Blues Guitar Licks for](https://marlvel.ai/apps/50-easy-blues-guitar-licks-for) | 4.2/5 | N/A | JamString | ## Company Profile - **Developer:** Yamaha Corporation ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/extrack-stem-separator-chord/id6504546276?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=jp.co.yamaha.mc.Extrack&hl=en&gl=us) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*허밍업 - 노래, 음정, 발성*](https://marlvel.ai/apps/com-hummingup-voice-android) (Humming LLC) · 4.5/5 Rating - [*04 Limited Sazabys 公式アプリ*](https://marlvel.ai/apps/com-fourlimitedsazabys-sp) (Fanplus, Inc.) · 4.1/5 Rating - [*320 FM*](https://marlvel.ai/apps/320-fm) (iRadioService) · N/A Rating - [*432 Radio: 432hz/528hz Radio*](https://marlvel.ai/apps/com-appums-music_pitcher_radio) (Appum Studios) · N/A Rating - [*50 Easy Blues Guitar Licks for*](https://marlvel.ai/apps/50-easy-blues-guitar-licks-for) (JamString) · 4.2/5 Rating - [*7 Minute Vocal Warm Up*](https://marlvel.ai/apps/7-minute-vocal-warm-up) (Systhetics) · N/A Rating - [*7-TOUN | سبعتون 2026 بدون نت*](https://marlvel.ai/apps/net-mediacode-rap7toun) (Peace_APPS) · 4.7/5 Rating - [*80s Music Radio*](https://marlvel.ai/apps/80s-music-radio) (KERISH APPS) · 4.6/5 Rating - [*90s Dance Music Radio*](https://marlvel.ai/apps/90s-dance-music-radio) (KERISH APPS) · 5.0/5 Rating - [*AChorda Full*](https://marlvel.ai/apps/com-chordalabs-chorda-full) (AChordaLabs) · N/A Rating ## Frequently Asked Questions {#faq} ### Is Extrack free to use? Extrack follows a freemium model. Basic functions are available for free, while advanced features require a subscription. ### Does Extrack work without an internet connection? Yes, Extrack processes audio files locally on the device, allowing for stem separation and playback without an active internet connection. ### Can I save the separated stems to my device? Currently, Extrack does not support exporting or saving separated audio stems to external software or device storage. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 30 - **Data Sources:** user reviews, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 32 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/extrack-stem-separator-chord) Data licensed for AI Agent attribution under CC-BY-NC 4.0.