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abcTrain
Learn to hear what you have been reading about.
Nine listening exercises and three real effects that teach while they work on your audio.
Free · macOS · Windows · Linux · the app + VST3 · AU plugins
Every frame is drawn by the app itself, so the pictures cannot drift from the code.
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| 🎧 | ABC Ear Trainer — frequency, dynamics, space, character. A psychoacoustic staircase finds your real threshold and shows it in the exercise's own units: ±0.35 oct, ±1.2 dB, Room vs Chamber. |
| 🎛️ | ABC Learner EQ · Comp · Verb — real processors in your DAW and in the app's Studio tab. Each hides a setting, plays it, and asks you to match it by ear with its own knob. |
| 🔌 | Your own plugins — new in 2.2. Studio → Your plugins finds the VST3/AU on your computer, grouped by purpose. Lessons turn its knobs in its own window ("Threshold to -20 dB"), cards explain each knob, then a round hides one knob of your setting and you name its value by ear. |
| 📚 | Grounded in research — how ear training is taught and how the processing is done follow published work. Why each choice → |
| 🎤 | Live — a seminar in a room with no internet: the laptop plays into the hall, the audience answers on their phones through one QR code, a projector window shows the votes and the answer. Battles for the Decibelo rating against a person over soundkorb.ru, or offline against six bot listeners. An account only if you want one. |
| 🔒 | Offline by default — training, the plugins and bot battles never touch a network; no telemetry. Live connects only when you open it. |
How to use it → · Install & the unsigned warning · The exercises · The plugins
What it looks like in 2.2
Rendered by the app itself (tools/EditorSnapshots), so they cannot drift from the code.
Built in the open
Everything is decided in public: what is planned, why, and what testers found.
Code, a translation or a sound pack you have the rights to — see CONTRIBUTING.
Support it
Free for everyone, with nothing locked. Support pays for what the project cannot do on its own — code signing so the installer stops warning, and licensed music for the sound library.
The source is open to read and to build for yourself; it is not licensed for redistribution or commercial use — LICENSE. JUCE and libcurl keep their own licences. By soundkorb.
