llms.txt
# CPL OF MNGS
> CPL OF MNGS is the tools label by Couple of Mangos. It makes focused music and macOS utilities, including SOUND, Mozart, and free browser tools.
SOUND is a free, private per-app equalizer, volume mixer, and output router for macOS 26 or later. Mozart is a web and macOS composition partner that turns musical intent into editable, reproducible MIDI parts and a playable live session.
> Full content: [llms-full.txt](https://www.cplofmngs.com/llms-full.txt)
## Products
- [CPL OF MNGS](https://www.cplofmngs.com/): the label, its principles, and its current products.
- [SOUND](https://www.cplofmngs.com/sound): a free macOS menu-bar app with per-app equalizer, volume, and output controls.
- [SOUND changelog](https://www.cplofmngs.com/sound/changelog): release notes for every version; the current release is 0.3.10.
- [Mozart](https://www.cplofmngs.com/mozart): an AI composition partner and live session mixer for web and macOS.
- [Mozart for students](https://www.cplofmngs.com/students): verified students can request full Mozart access at no cost.
## Free browser tools
- [Free tools](https://www.cplofmngs.com/tools): private, no-account music and Mac audio utilities that run in the browser.
- [Vocal remover and stem splitter](https://www.cplofmngs.com/tools/stem-splitter): remove vocals or split a song into vocals, drums, bass, other and instrumental; [Standard](https://www.cplofmngs.com/tools/stem-splitter?tier=standard) is free, while [Studio](https://www.cplofmngs.com/tools/stem-splitter?tier=studio) is one dollar per track and returns five WAV stems.
- [MIDI generator](https://www.cplofmngs.com/tools/midi-generator): create reproducible chords, melodies, basslines, and drums; preview them and download editable MIDI without AI or uploads.
- [Bars-to-time calculator](https://www.cplofmngs.com/tools/bars-to-time): convert tempo, meter, tempo pulse, and bars into an exact duration.
- [BPM-to-milliseconds calculator](https://www.cplofmngs.com/tools/bpm-to-milliseconds): calculate straight, dotted, and triplet delay, reverb pre-delay, and modulation times.
- [Mac audio troubleshooter](https://www.cplofmngs.com/tools/mac-audio-troubleshooter): diagnose no sound, Bluetooth quality, volume, output, and channel problems.
## Guides, help, and policies
- [Mac audio guides](https://www.cplofmngs.com/blog): practical answers to common Mac sound-control questions.
- [Help Center](https://www.cplofmngs.com/help): setup and troubleshooting for SOUND and Mozart.
- [SOUND help](https://www.cplofmngs.com/help/sound): installation, permissions, sound controls, outputs, updates, and privacy.
- [Mozart help](https://www.cplofmngs.com/help/mozart): projects, audio, MIDI, composition, accounts, and billing.
- [Privacy policy](https://www.cplofmngs.com/privacy): how data is handled.
- [Terms of use](https://www.cplofmngs.com/terms): terms for the site and the SOUND app.
- [Return policy](https://www.cplofmngs.com/return-policy): cancellation and refund policy for SOUND and Mozart.
## SOUND help
- [Get started with SOUND](https://www.cplofmngs.com/help/sound/get-started): Install SOUND and make your first per-app adjustment.
- [SOUND cannot see or change an app](https://www.cplofmngs.com/help/sound/permissions): Allow the one macOS permission SOUND needs for live system audio.
- [There is no sound or the wrong speaker is playing](https://www.cplofmngs.com/help/sound/no-sound): Check the app’s output before changing your Mac’s whole system output.
- [Use the equalizer and presets](https://www.cplofmngs.com/help/sound/equalizer-presets): Build a useful sound without changing every band from scratch.
- [Updates and privacy](https://www.cplofmngs.com/help/sound/updates-privacy): Keep SOUND current and understand what stays on your Mac.
## Mozart help
- [Start a Mozart session](https://www.cplofmngs.com/help/mozart/get-started): Use a small brief, listen early, and keep the first session playable.
- [No sound, input, or MIDI device](https://www.cplofmngs.com/help/mozart/audio-midi): Give Mozart the access it needs, then choose the device inside the app.
- [Projects, saving, and account access](https://www.cplofmngs.com/help/mozart/projects): Keep work safe and find it on either platform.
- [AI composition and musical practices](https://www.cplofmngs.com/help/mozart/composition): Use Mozart as a transparent musical partner, not a shortcut to a tradition.
- [Trial, subscription, and lifetime access](https://www.cplofmngs.com/help/mozart/billing): Manage paid AI access without affecting your free project tools.
## SOUND facts
- [Per-app equalizer and volume](https://www.cplofmngs.com/sound): an 8-band equalizer (63 Hz–8 kHz, ±12 dB) and independent volume for each active app, plus a System control.
- [Per-app output routing](https://www.cplofmngs.com/sound): send an app to the system output or a specific available speaker.
- [Presets that sync](https://www.cplofmngs.com/sound): built-in and custom presets that sync across Macs via iCloud.
- [Local audio processing](https://www.cplofmngs.com/privacy): SOUND processes audio on the Mac and never records, stores, or uploads it.
## Mozart facts
- [Composition partner](https://www.cplofmngs.com/mozart): Mozart turns a musical brief into playable MIDI parts using independently selectable melody, rhythm, and harmony practices.
- [Live session mixer](https://www.cplofmngs.com/mozart): Mozart combines generated parts, MIDI hardware control, and live audio input in a playable session grid.
- [Access and pricing](https://www.cplofmngs.com/mozart): browsing, playing, and saving are free; Mozart AI is paid and includes a 10-day free trial. [Open Mozart](https://mozart-app-one.vercel.app).
- [Student access](https://www.cplofmngs.com/students): verified students can request full access without a trial or payment card.
## SOUND guides
- [Mac equalizer: how to add an equalizer for any app](https://www.cplofmngs.com/blog/how-to-add-an-equalizer-on-mac): A practical guide to Mac equalizers, per-app volume, and sending different apps to different speakers.
- [Mac volume mixer: control each app’s volume separately](https://www.cplofmngs.com/blog/how-to-control-volume-of-individual-apps-on-mac): The native options, mixer setup, browser-tab limits, and fixes you need to balance apps without changing your whole Mac.
- [Route audio per app on Mac: speakers, headphones and calls](https://www.cplofmngs.com/blog/how-to-route-audio-per-app-on-mac): A clear guide to per-app audio routing on Mac: different apps, different speakers, one menu-bar control.
- [Spotify equalizer for Mac: adjust Spotify only](https://www.cplofmngs.com/blog/how-to-use-an-equalizer-with-spotify-on-mac): Tune Spotify with a per-app equalizer, save a curve you like, and keep the rest of your Mac sounding untouched.
- [Background Music stopped working on macOS Tahoe? Here’s a modern replacement](https://www.cplofmngs.com/blog/background-music-alternative-for-macos-tahoe): The beloved open-source volume mixer relies on a driver architecture macOS has moved past. A driver-free replacement takes two minutes.
- [3 eqMac alternatives for per-app EQ without a virtual audio driver](https://www.cplofmngs.com/blog/eqmac-alternatives-without-audio-drivers): The Mac equalizer landscape splits into two generations: apps that install virtual audio drivers, and apps built on the modern per-app audio engine.
- [3 SoundSource alternatives for Mac: free, open-source, and power-user options](https://www.cplofmngs.com/blog/soundsource-alternatives-for-mac): SoundSource is the complete professional choice. These three alternatives trade some of that depth for older-Mac support, open source, or a simpler free workflow.
- [3 Sound Control alternatives for Mac: simpler ways to manage app audio](https://www.cplofmngs.com/blog/sound-control-alternatives-for-mac): Sound Control rewards power users. These three alternatives offer a more polished professional suite, open-source flexibility, or a focused free menu-bar tool.
- [4 FxSound alternatives for Mac: free and paid options that run on macOS](https://www.cplofmngs.com/blog/fxsound-alternatives-for-mac): There is no FxSound for Mac. The right replacement depends on what you used it for: louder audio, enhancement effects, open source, or a clean equalizer.
- [5 best equalizers for Mac: free & paid options compared](https://www.cplofmngs.com/blog/best-equalizer-for-mac): The real difference between Mac equalizers is not the band count. It is whether the app installs a virtual audio driver or uses the per-app engine already inside macOS.
- [How SOUND controls Mac app audio without a virtual driver](https://www.cplofmngs.com/blog/how-sound-controls-mac-audio-without-a-virtual-driver): A plain-language look at the modern macOS audio path behind SOUND, what the permission allows, and what stays on your Mac.
- [Best equalizer settings for podcasts on Mac: start with clarity, not more treble](https://www.cplofmngs.com/blog/best-equalizer-settings-for-podcasts-on-mac): A calm 8-band starting point for clearer speech—plus the listening test that matters more than any universal preset.
- [Bluetooth headphones sound muffled on Mac? Fix it](https://www.cplofmngs.com/blog/bluetooth-headphones-sound-bad-on-mac): Before reaching for an equalizer, check whether a call or browser tab has switched the headset into lower-quality two-way audio.
- [Spotify Lossless on Mac: turn it on and hear what actually changes](https://www.cplofmngs.com/blog/spotify-lossless-on-mac): Lossless starts with one Spotify setting, but the connection to your headphones or speakers decides whether those extra bits reach the last step.
- [How to control the volume of individual browser tabs on Mac](https://www.cplofmngs.com/blog/how-to-control-volume-of-individual-browser-tabs-on-mac): Use the browser's own mute controls first, then choose app-level volume when one browser needs to sit beneath calls, music, or another app.
## Stem-separation guides
- [How to split a song into stems: vocals, drums, bass and more](https://www.cplofmngs.com/blog/how-to-split-a-song-into-stems): A practical stem-separation workflow: choose the right source, split it, check the difficult edges, and bring useful parts into your next session.
- [How to isolate vocals from a song for an acapella](https://www.cplofmngs.com/blog/how-to-isolate-vocals-from-a-song): Make a useful acapella from a finished mix, understand the artifacts you may hear, and keep the original timing intact for a remix.
- [How to isolate drums from a song without losing the groove](https://www.cplofmngs.com/blog/how-to-isolate-drums-from-a-song): Extract the rhythmic shape of a finished track, keep its timing intact, and turn imperfect separation into a useful production reference.
- [LALAL.AI alternatives: split stems without a subscription](https://www.cplofmngs.com/blog/lalal-ai-alternatives-without-a-subscription): Most separators share the same research models. Choose on billing, accounts and stem count instead, and stop paying monthly for a tool you open twice a year.
- [How to make an instrumental from a song](https://www.cplofmngs.com/blog/how-to-make-an-instrumental-from-a-song): Create a useful backing track from a finished mix, understand what vocal removal can leave behind, and keep the result aligned with the original.
## Mozart journal
- [How to get out of the 8-bar loop (without adding more tracks)](https://www.cplofmngs.com/blog/how-to-get-out-of-the-eight-bar-loop): The answer to an eight-bar loop is rarely more layers. It is a few decisions that give the idea somewhere to go.
- [Music needs more than a style](https://www.cplofmngs.com/blog/how-to-work-with-musical-tradition): A tradition is not a texture to sprinkle over a track. It is a body of choices, histories, and listening—worth approaching with more care.
- [How to start DJing: build your first 30-minute set](https://www.cplofmngs.com/blog/how-to-start-djing): The fastest way to learn DJing is not more gear or more tracks. Build one small set, know why every transition belongs, and play it until it feels like yours.
- [How to make your first electronic track: start with a small arrangement](https://www.cplofmngs.com/blog/how-to-make-your-first-electronic-track): Your first electronic track does not need a wall of presets. A beat, bass, one musical idea, and a few deliberate changes are enough to finish something real.
- [How to plan a DJ set: build an energy curve you can still leave](https://www.cplofmngs.com/blog/how-to-plan-a-dj-set-energy-curve): The strongest DJ set plan gives you direction without scripting the audience. Build landmarks, arcs, and exits instead of one locked playlist.
- [How to make chord progressions more interesting: move the voices, not the chord count](https://www.cplofmngs.com/blog/how-to-make-chord-progressions-more-interesting): Before adding exotic chords, change how the notes travel, when the harmony arrives, and what the bass chooses to say.
- [What are 8 bars in music? Count the phrase, not the screen](https://www.cplofmngs.com/blog/what-are-8-bars-in-music): Eight bars is a useful unit of musical time, not a law. Count the pulse, listen for change, and let the recording tell you where the phrase ends.
- [What is musical style? Genre, style, and tradition are not the same](https://www.cplofmngs.com/blog/what-is-musical-style): Genre helps people gather, style describes audible choices, and tradition carries practice through people and time. The words overlap, but they do different work.
- [How long is a bar of music? Convert bars to seconds at any tempo](https://www.cplofmngs.com/blog/how-long-is-a-bar-of-music): A bar has no fixed duration. It lasts as long as its beats do, which makes tempo and meter the only two numbers you need.
- [Spotify Mix: make DJ-style playlists and use Spotify DJ](https://www.cplofmngs.com/blog/spotify-mix-playlists-and-dj): Make your first mixed playlist, fix its rough handoffs, and choose the right Spotify DJ feature for what you want to do.
- [Can you DJ with Spotify in 2026? What works—and what does not](https://www.cplofmngs.com/blog/can-you-dj-with-spotify): Spotify is useful for learning and experimenting inside supported DJ software. It is not a dependable or licensed replacement for an owned performance library.
- [AI MIDI generator: keep the notes editable and the decisions yours](https://www.cplofmngs.com/blog/ai-midi-generator-editable-workflow): The useful shift in AI music is not a faster finished song. It is a playable part you can question, reshape, and make answer the rest of your music.
- [How to write a melody over a chord progression](https://www.cplofmngs.com/blog/how-to-write-a-melody-over-a-chord-progression): Turn a chord loop into a melody with direction: hear the stable notes, create tension deliberately, and revise the phrase instead of guessing at a scale.
## Contact
- [Email CPL OF MNGS](mailto:contact@cplofmngs.com): contact@cplofmngs.com
