# Signal Music VII, Atmosphere To commemorate Halloween, this post is all about using noise sources to create spooky sounds. The example at the end of this post will be an arrhythmic soundscape with background sounds and atonal melodies. ## Example This example uses the following recipes: - [[Instrument V, Karplus-Strong Synth]] - [[Instrument VIII, Bass Synth]] - [[Instrument IX, Noise Drone]] - [[Instrument X, Phase Modulator]] - [[Instrument XI, Droplet Generator]] ## Global Ramp Patch This patch allows us to have a global ramp, which we `[send~ ramp`] to the other patches, keeping everything in sync. Variations of this approach can be useful for performance situations. > [!example] > ![[image-93.png]] > A simple global ramp patch, to keep multiple other patches in sync. ## Noise Drone Runs noise through a slowly-evolving filter bank, creating wind and thunder sounds. > [!example] > ![[image-94.png]] > [[Instrument IX, Noise Drone]] There are 3 subpatches, which generate the random values for the multisliders above. > [!example] > ![[image-95.png]] > [!example] > ![[image-96.png]] > [!example] > ![[image-97.png]] ## Phase Modulator This generates semi-percussive melodies which follow the global ramp. All of the parameters evolve slowly over time. > [!example] > ![[image-102.png]] > [[Instrument X, Phase Modulator]] > [!example] > ![[image-101.png]] ## Karplus-Strong Synth Also following the global ramp is the Karplus-Strong synth, which also has several parameters which slowly evolve over time. The Phase Modulator and the Karplus-Strong Synth together create a sort-of lurchy melody. > [!example] > ![[image-103.png]] > [[Instrument V, Karplus-Strong Synth]] > [!example] > ![[image-104.png]] ## Droplet Generator The Droplet Generator plays periodically at random intervals, and is run through a number of effects, making it sound like animal calls or water droplets in the distance. > [!example] > ![[image-99.png]] > [[Instrument XI, Droplet Generator]] ## Bass Synth Every sixteen notes, a bass synth sound will play. Pulse-width modulation is used to make it growl a little bit. > [!example] > ![[image-100.png]] > [[Instrument VIII, Bass Synth]] ## Complete Example > [!example] > ![[example-5.mp4]] > A complete atmospheric example, using each of the 5 instruments we created. ([[example-5.mp4|Click here to view, if it's not displaying]])