Ampter

Audio Mastering Painter, an app that lets you paint on sound.

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• Dragging your mouse across the spectrogram will apply your chosen effect onto the region you selected
• Try selecting Gain in the effects menu, setting gain_db to 20, drawing on the spectrogram, and hearing what it sounds like

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Shortcuts:

• Click: change playhead position
• Drag: draw with brush (effect)
• Scroll: move left/right one block (.25 second) at a time
• Shift scroll: stretch/squeeze spectrograms
• Left arrow: move left 1 second (same as “move left” button)
• Right arrow: move right 1 second (same as “move right” button)
• Space: play/pause
• (options spinner) Enter: remove focus from spinner and save changes

Usage:

• Run pip install -r requirements.txt to get the python dependencies
• If cloning from github, get the .jar file from Releases, place it at the root of the repo and click on it (or run java -jar ./Ampter.jar)
• If that doesn’t work, open the repo as a netbeans project and manually load the flatlaf and jep dependencies
  • Build the jar with Files tab>build.xml>right click>Run Target>Other Targets>package-for-store

Bugs:

• If any of the three singletons crash the whole program becomes unusable
• Loading a non-audio-file as audio crashes the program
• Loading a non-vst-folder as a vst crashes the program
• If you set the gain too high you get really scary aliasing artefacts
• No spectrograms can be calculated when you are playing audio because jep can only allow python to run in one thread (and I don’t want to pass a multi-megabyte array between two languages)