$Page Building Instruments $TargetName Building Instruments *Learning to build an Instrument* This lesson takes you through the steps to create an instrument that receives MIDI notes and outputs audio. *Note:* this lesson assumes you have followed the $Link Introduction . *Building the Bell Tower device* Let’s build a polyphonic Frequency Modulation (FM) synthesizer optimized for creating bell sounds. Bell-Tower.png Play the clips in track 1 to hear how this synth sounds. The synth allows up to 16 release tails to play simultaneously, and supports a pitch LFO that has a different offset for each of the 16 voices. It also spreads the release tails randomly over the stereo field. Together, this results in bells with a long reverb-like effect. *Topics* This lesson will show you how to: -> Use the basic objects that every instrument needs -> Use an FM algorithm -> Make a synth polyphonic -> Create differences in sound depending on the voice -> Make a device’s user interface follow Live color themes -> Create a panel style interface *Bonus* -> Make an amplitude-dependent stereo spreader After the last step, continue to $Link Controlling Live .