CogCog
Audio Player for Mac, iPhone and iPad

A free and open source audio player for Mac, iPhone and iPad.

Download v3810 for Mac50.1 MB
Published Oct 18, 2026, 9:01 PM · Requires macOS 12.0
  • view commit • iOS: Info from Now Playing's toolbar, and as a card beside the playlist
  • view commit • Waveform: rectified and linear by default
  • view commit • iOS: Go to Current Track from the mini player and the art
  • view commit • iOS: The mini player in Liquid Glass, easing from track to track
  • view commit • iOS: Acknowledgements in Settings
Older versions ↓
Download on the App Store
Features

What Cog does

Supported Formats

Plays almost anything

  • MP3 (including free format, up to 640kbps; via minimp3)
  • WAV
  • MPEG-4 container, including chapter support
  • Matroska container, including chapter support
  • AAC
    • LC-AAC
    • HE-AAC
    • HE-AACv2
    • xHE-AAC (USAC)
  • Apple Lossless (ALAC)
  • FLAC (including OggFLAC)
  • Ogg Opus
  • Ogg Vorbis
  • AC3
  • Windows Media Audio
  • DTS
  • TrueHD
  • HDCD
  • TTA True Audio
  • TAK (Tom's Lossless Audio Kompressor)
  • Monkey's Audio (APE)
  • APL (APE Linking File)
  • TwinVQ
  • RealAudio
  • ATRAC3
  • Musepack
  • WavPack, including DSD support
  • Interchange File Format (IFF) including DSDIFF
  • DSD Stream File (DFF)
  • Wideband Single-bit Data (WSD)
  • MIDI
    • SoundFont, DLS, and embedded soundbank support via a native port of the SpessaSynth synthesizer
    • FM synthesis via Nuked OPL3
    • Sound Canvas emulation via Nuked SC55
    • Audio Unit synthesizer support, including Apple's DLSMusicDevice
  • Shorten
  • Tracker music
  • SID
  • Game music
    • GBS (Game Boy)
    • NSF (Nintendo)
    • SPC and SNSF (Super Nintendo)
    • VGM (Master System, Genesis/Mega Drive, Game Gear, etc)
    • VGZ (compressed variant of the above)
    • PSF (PlayStation)
    • SSF (Saturn)
    • DSF (Dreamcast)
    • QSF (Q-Sound)
    • USF (Nintendo 64)
    • NCSF and 2SF (Nintendo DS)
    • Organya (Cave Story)
    • Streamed music via vgmstream
  • Archive files
    • ZIP
    • RAR
    • GZip
    • 7Z
Archive

Older versions

These releases and their notes cover the Mac app only. Cog for iPhone and iPad updates through the App Store.

v3805Oct 18, 2026, 2:58 AMDownload 50.1 MB
  • view commit • iOS: Add the project's workspace and Xcode Cloud manifest
  • view commit • Readme: Rewrite it for the Mac and iOS apps [skip ci]
  • view commit • iOS: Declare that the app uses no non-exempt encryption
  • view commit • MIDI: Update spessasynth_core to 4.3.22
  • view commit • iOS: Scroll to and highlight what is added
  • view commit • iOS: Declare the files Cog plays, and open them
  • view commit • CogPlaylist: Leave hidden files out of folders
  • view commit • iOS: Animate play and pause, and fill Now Playing's height in landscape
  • view commit • Downmix: Fit surround to devices that are neither stereo nor wider
  • view commit • Downmix: fit equal-count, different-layout with upmix
  • view commit • channelIndexFromConfig: honor ~0 sentinel for absent flags
  • view commit • Waveform seek bar on macOS and iOS
  • view commit • iOS: Ease fast forward in from the tempo
  • view commit • iOS: Info, as the macOS Info Inspector has it
  • view commit • iOS: Search for artist or album, and remove, from a playlist row
v3790Oct 7, 2026, 2:59 AMDownload 50.02 MB
  • view commit • Engine: Announce prebuffering again
  • view commit • MIDI: Find Nuked SC-55's back.data without searching every bundle
  • view commit • MIDI Visualization: Moved back.data loading to correct place
  • view commit • Plugins: Register without the slow parts of setup
  • view commit • CoreAudio: Open files that carry no channel layout
  • view commit • CogPlaylist: Add the framework, and build the app's model from it
  • view commit • PlaylistEntry: Move what is shared to CogPlaylist, in Swift
  • view commit • PlaylistLoader, SQLiteStore: Read stored URLs through +[PlaylistEntry urlForPath:]
  • view commit • PlaylistEntry: Look up the category's strings in the app's bundle
  • view commit • CogPlaylist: Read and store entries' info, and keep their album art
  • view commit • CogPlaylist: Expand what is added, and call the plugins safely
  • view commit • Plugins: Build without AppKit
  • view commit • Frameworks: Build for iOS as well as macOS
  • view commit • CogAudio: Build and play on iOS as well as macOS
  • view commit • Scripts: Build the third-party libraries for iOS
  • view commit • CI: Build the iOS libraries
  • view commit • CI: Install cmake and ninja for the iOS libraries
  • view commit • CogPlaylist: The playlist's order, and loading it
  • view commit • iOS: The Cog app for iPhone and iPad
  • view commit • CI: Build the iOS app
  • view commit • iOS: Spanish
  • view commit • iOS: Now Playing's less used controls in a menu
  • view commit • iOS: Fast forward and rewind, holding Next and Previous
  • view commit • iOS: Version the app from git, as Cog is
  • view commit • iOS: Register the defaults the plugins read
  • view commit • iOS: Make the app depend on the frameworks it embeds
  • view commit • iOS: Share the macOS app's bundle ID
  • view commit • iOS: Pass App Store Connect's bundle validation
v3633Aug 14, 2026, 9:05 AMDownload 49.9 MB
  • view commit • MIDI: Last minute SpessaSynth bug fix for drums
v3632Aug 14, 2026, 6:20 AMDownload 49.9 MB
  • view commit • MIDI: Updated SpessaSynth with major changes
  • view commit • Normalize file reference URLs before opening or storing them
  • view commit • MIDI: Filter all SpessaSynth banks through player
  • view commit • MIDI: Use SpessaSynth for files with external bank
  • view commit • Preferences: Move Resampling to Synthesis
  • view commit • MIDI: Fix a serious looping bug with Sinc mode
  • view commit • MIDI: Fixed SpessaSynth handling weird DLS banks
v3625Aug 11, 2026, 11:09 PMDownload 49.82 MB
  • view commit • MIDI: Release the audio unit when the player that made it goes
v3405Mar 14, 2026, 9:44 PMDownload 46.03 MB
  • view commit • TagLib: Updated TagLib to version 2.2.1
v3404Mar 10, 2026, 5:51 AMDownload 45.95 MB
  • view commit • Debugging: Add more verbose bad URL logging
  • view commit • Highly Complete: Update lazyusf2
  • view commit • Audio Playback: One more safety check
  • view commit • VGMStream: Updated libvgmstream code base
v3400Mar 5, 2026, 4:28 AMDownload 45.95 MB
  • view commit • Output: Attempt to fix possible race condition
  • view commit • DSP Chain: Implement Signalsmith Stretch as option
  • view commit • Touched by Xcode
  • view commit • VGMStream: Updated libvgmstream code base
  • view commit • DSP Chain: Last remaining fixes for Signalsmith
  • view commit • App Delegate: Silence warning on macOS 12+
  • view commit • DSP Chain: Correct Signalsmith Stretch engine name
v3349Dec 13, 2025, 2:59 AMDownload 46 MB
  • view commit • Highly Complete: Move silence seconds declaration
  • view commit • Highly Complete: Move GSF sample rate reporting
  • view commit • TagLib: Don't collide with inputs' own chapters
  • view commit • FFmpeg: Signal tag updates for normal files
v3345Dec 7, 2025, 7:17 AMDownload 46 MB
  • view commit • FFmpeg: Fix unmapped tags' name case matching
  • view commit • Audio Player: Work around some potential crashes
v3343Oct 9, 2025, 5:33 AMDownload 46.41 MB
  • view commit • Bug Fix: Resize album art for info button
v2405Jun 23, 2022, 2:55 AMDownload 39.86 MB
  • view commit • [Playlist Info Loader] Do not clear if loading
  • view commit • Serialize persistent store update to main thread
  • view commit • Updated VGMStream to r1745-37-g776c4d8c
v2402Jun 22, 2022, 11:57 PMDownload 39.86 MB
  • view commit • Changed updater script to handle new version strings
  • view commit • AboutWindow adjustments
  • view commit • Merge pull request #280 from losnoco/nevack/about-window
  • view commit • Fix runtime warnings in Window/AboutWindowController.xib
  • view commit • [About Window] Reorganized credits and added @nevack and myself in them
  • view commit • [About Window] Fix
  • view commit • Sync version number with main branch
v2395Jun 22, 2022, 8:12 AMDownload 39.86 MB
  • view commit • Add Sandbox notice to README
  • view commit • Removed Sparkle
  • view commit • Change version numbering system
  • view commit • Change the product install path to /Applications
  • view commit • [Sandbox] Update Info.plist generator
  • view commit • Update Info.plist
  • view commit • Remove stray entitlement from Sparkle
  • view commit • Update Patreon credits
  • view commit • [Core Audio Output] Guard against nil pointer
  • view commit • [Sandbox Configuration] Fix nil pointer issues
  • view commit • [Sandbox Configuration] Do not delete path on fail
  • view commit • [Sandbox Configuration] Delete from storage later
  • view commit • [Sandbox Configuration] Do more checks on test
  • view commit • Revert "Remove stray entitlement from Sparkle"
  • view commit • Revert "Removed Sparkle"
  • view commit • [Info Plist] Auto format XML escapes
  • view commit • [Crashlytics] Require asking user consent
  • view commit • [About Dialog] Switched to WebView for credits
  • view commit • [Main Menu] Added Privacy Policy link in App Menu
  • view commit • Remove deep forced code signing option
  • view commit • Completely overhaul code signing practices
  • view commit • [Volume Control] Only initialize view once
  • view commit • Remove developer supplied configuration file
  • view commit • Assign blank development team in project files
  • view commit • One last attempt to fix CI
Legacy

Very old builds

Version 1148
Mountain Lion
Version 2405
Sierra
Version 3349
High Sierra
Version 3405
Mojave
Version 3633
Catalina