I recorded a drum solo to demo Glimmer Metronome, a Ruby-based metronome GUI app that supports different beat counts, click sounds, and tempos, including tap-based tempo calculation. It was built with Glimmer DSL for SWT using JRuby to help me with my drumming practice. Glimmer Metronome just received a new update in version 1.1.4 that adds menus and keyboard shortcuts, thus becoming more user-friendly when used via the keyboard alone.
