WoodWinder : MIDI Controlled Recorder

Sammanfattning: WoodWinder is a machine whose job is to interpret the signal from a Musical Instrument Digital Interface (MIDI) keyboard and make a recorder play accordingly. This was performed by simulating the two human traits needed in order to play the recorder: providing air flow for the mouthpiece and fingers to cover its holes. The air flow was provided by a custom made centrifugal fan and directed through a separation chamber which determined how much air was allowed to travel through the mouthpiece and how much was driven out through an exhaust. The purpose of the separation chamber was to simulate the amplitude of the played tone. The movement of the fingers was enabled by seven servo motors, mounted collaterally to the recorder. All movement was governed by two Arduino Microcontroller Units (MCU), a servo driver and a motor driver. The machine can play any note on demand without hardly any noticeable lag. The two lowest tones D and C were somewhat limited as they produced a distorted sound at high enough velocities. The largest error in accuracy for expected frequencies was around 6Hz.