CogCog
Audio Player for Mac, iPhone and iPad

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

Download v3876 for Mac50.84 MB
Published Nov 5, 2026, 6:07 AM · Requires macOS 12.0

Lyrics can now follow the music line by line when they're timed, and the waveform is available as a toolbar item. This update also adds support for more game audio formats.

New

  • Synced lyrics: when lyrics are timed (from the file's tags, a .lrc file next to the track, or LRCLIB), the Lyrics window highlights the line being sung and keeps it in view. Click a line to jump to that point, or use the Synced Lyrics toggle to go back to plain text.
  • Waveform toolbar item: add a small live waveform to the main or mini player toolbar from the toolbar customization palette. It's drawn while playing, and clicking it opens the waveform window.
  • New "Show info about" setting in General Preferences. It chooses whether the Info Inspector, Lyrics and the mini player show the playing track or the selected track.

Improved

  • The Info Inspector, Lyrics and the mini player now follow the playing track by default. They used to prefer the selected track.
  • Support for more game audio formats, including new KA Sound, .hvg and .xsnd files and additional older sound banks.
  • ATRAC9 and G.719 audio now use built-in decoders, which fixes some crashes and broken .xvag files.

Fixed

  • Fixed playback or duration problems with some files, including .mp4 with xHE-AAC, high-sample-rate .ueba, .brwav, and some .aud, .gcm, .bao, .awb, .szd and .ckd files.
  • .usm files now read their .hcakey keys.
Older versions ↓
Download on the App Store
Features

What Cog does

Everywhere

On the Mac

On iPhone and iPad

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.

v3868Nov 2, 2026, 2:59 AMDownload 50.79 MB

Adds a Waveform visualizer pane, gathers the visualizers in a View submenu, and fixes seek bar waveforms for archived and truncated files.

New

  • Waveform pane: a dockable visualizer that shows what you're hearing as an oscilloscope or a scrolling envelope of the last few seconds. Open it from the Window menu, click it to switch modes, and choose its style and color in Appearance preferences.

Improved

  • The visualizers (Spectrum, VU Meter, Waveform and Nuked SC-55) now live in View > Visualizers, with their shortcuts unchanged.

Fixed

  • The seek bar waveform now appears for tracks inside zip and other archives.
  • If a waveform scan came up empty, the track is scanned again the next time it plays instead of staying blank.
  • Files that are shorter than their header claims no longer show a noisy waveform at the end of the seek bar.
v3857Nov 1, 2026, 3:28 AMDownload 50.76 MB
  • view commit • Window: Take in the volume slider's whole frame on macOS 15
  • view commit • Window: Hide the volume tooltip on a timer
  • view commit • Window: Enable the toolbar sliders again after a sheet
  • view commit • Quick Look: Preview the files Cog plays in Finder
  • view commit • SID: End songs at their length again
  • view commit • Playlist: Rate only by a click on the stars
  • view commit • Window: Centre the volume tooltip's text
  • view commit • Window: Centre the toolbar time in its field
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