PeppyMeter is a software VU Meter written in Python. It was originally developed as the new ‘VU Meter’ screensaver for Peppy Player. With minor modifications it became a stand-alone application. PeppyMeter gets audio data from media players (e.g. mpd) via fifo and displays current volume levels in a Graphical User Interface in the form of a traditional VU Meter.

• Written in Python.
• Pygame library leveraged for UI purposes.
• UI is available in three resolutions 800×480, 480×320 and 320×240 pixels.
• The input for the program is the data from the named pipe. That signal should be provided by peppyalsa plugin.
• Supplies 9 default meters out of the box.
• Allows you to add your own meters.
• Open-source. All source files are available on Github.
• Several data sources are available for testing and tuning.
• Provides four types of output: Display, Serial, I2C and PWM.

github.com/project-owner/PeppyMeter.doc/wiki
github.com/project-owner/PeppyMeter
diyaudio.com/forums/pc-based/291010-peppymeter