Stem Checker

Stem & Multitracks QC Tool

Only for Mac

Free · In‑App Purchases

Mac

Quickly check and organise stems and multitracks without opening a DAW. The Essential Tool for Checking and organising Stems and Multitracks. Stop wasting time loading your bounced stems back into a heavy DAW just for a QC check. Stem Checker is a lightweight, high-performance macOS workflow utility designed to provide fast, sample-accurate synchronized playback for audio professionals, run checks for common issues instantly, and provide tools for lightweight organisation to sort your files. Built for assistants, music producers, mixing engineers, and mastering engineers, Stem Checker dramatically accelerates your quality assurance workflow. Use it to verify your exports for missing audio, clipping, dual-mono exports, and content issues before they're sent to clients, collaborators, or mastering. Or as part of mix prep when receiving files from collaborators. Core Features: High-Performance Custom Engine: Experience flawless, glitch-free playback that scales to 40+ simultaneous stems, thanks to a custom audio engine built for professional use. Instant Mismatch Detection: Automatically identify stems with different lengths. A warning icon and proportionally scaled waveforms provide an immediate visual check for common export errors, saving you from costly mistakes. Seamless Workflow Integration: Load stems your way. Drag and drop files directly onto the app, use the traditional "Load" button, or use the powerful right-click "Stems" Quick Action directly within Finder. Full Keyboard Control: Control the transport with the spacebar (Play/Pause) and arrow keys (Seek) for a lightning-fast workflow without ever leaving your keyboard. Essential play back tools: Quickly isolate tracks with Solo or remove them from the mix with Mute to analyze your stems with precision, A/B between stems and a reference mix. Organisation: Convert dual-mono exports to true mono. Rename individual tracks, or use the batch renaming function to add prefixes, numbering and more. Export your way: Save instantly onto local drive, or use the Dropbox integration. Stem Checker is the missing utility in your audio toolkit, designed to save you time and give you confidence in every export. Terms of Use (EULA): https://stemchecker.io/terms

Ratings & Reviews

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New: Null test (beta): subtract the reference from the stem sum and see whether the stems rebuild the mix — and if not, where and the likely cause. Listen to the residual from compare mode Audio Statistics: integrated loudness (LUFS), true peak, clipping, RMS and loudness range for any stem, the stem sum and the reference Reference lane: your bounce sits in its own lane above the stems, unaffected by stem solo and mute, with one-click level match Delivery report: export as PDF, text or a shareable link Light mode (Settings → Display → Appearance) Polarity invert on every track, and optional exclusive solo and mute Improved: Drag to reorder stems with an insertion line; order and pins are remembered for the same set of files Stems load in Finder order, so “2 Snare” comes before “10 Bass” New checks for stems with unclear names and for mixed file formats A/B switching, mute, solo and level-match changes crossfade instead of clicking A damaged file is skipped and named, instead of emptying the whole session File menu with New Session (⇧⌘N), Add Files (⌘O) and Export Session (⌘E) Many fixes from tester feedback

Version 3.0

The developer, James Wilkins, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Contact Info
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
WRJ Limited
Size
259.8 MB
Category
Music
Compatibility
Requires macOS 14.0 or later.
  • Mac
    Requires macOS 14.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • Stem Checker Lifetime $29.99
  • Pro Monthly $3.99
  • Learn More
Copyright
© 2026 [Stem Checker Ltd]
  • Developer Website
  • Privacy Policy