hobby #21
Propeller Doppler Arpeggiator
Record close RC flybys with a stereo mic, track the Doppler-shifted propeller tone in software, then map the pitch curve into a MIDI arpeggio to compare passes, throttle settings, and airspeed as short musical phrases.
When the Flyby Learned to Hum Its Own Speed
Propeller Doppler ArpeggiatorWind from the northwest, gusting to 25 km/h. Not ideal for flying—but exactly what my arpeggios needed.
code-a-day tied to this hobby
- When Propellers Meet Musical Mathematics Beat Frequency Detection