# Instrument II, Noise Synth A lot of sounds found in nature can be replicated by taking a noise source and running it through a filter. Hi-hats, snares, claps, ocean sounds, thunder, and even flute sounds can be made with this basic recipe. > [!cite] Lore > ![[2-diamond-bit.png]] > Diamond Bit (art by Dead Carcosa) ## Basic Crispy Snare From [[Signal Music II, Beat and Rhythm]]. In this patch, we generate a ramp wave every two beats. We then split it in two and only play the second. This ramp wave is shaped into an envelope shape and is used to fade the sound in and out. The sound comes from a pink noise generator, which has fewer higher frequencies than white noise, giving it a slightly "filtered" sound. This sound is run through a bit crusher that gives it a little bit of character. > [!example] > ![[image-14.png]] > A basic snare using bit-crushed pink noise. ## Low-Passed Snare Snare sounds can be created out of a noise source run through many sorts of effects. Another effect that can help make decent snare sounds is a low-pass filter. In Max, we can use `[lores~]` to get some pretty good resonant low-pass filter sounds. > [!example] > ![[image-54.png]] > A resonant low-passed noise snare. ## Subdivided Hi-Hat Generator The actual sound in this patch is nothing too fancy, just white noise through a `[degrade~]` to make it crunchy. However, some interesting sequencing going on. The second `[stash~]` samples a value between 0.0-1.0 every quarter note. This value is used to look up a value in the first `[stash~]`, which emits values representing a multiplier for how fast to play our hi-hats. This means that hi-hats will get triggered 2-8x per quarter note, and the rates evolve slowly over time. The third `[stash~]` emits either a 0.0 or 1.0 and is used to not play certain notes. In this case, notes have a 75% chance of playing (see the `[>~ 0.25]`), and the probabilities evolve slowly over time. The fourth `[stash~]` emits values between 0.7-1.0 and is used to modulate the amplitude of the hi-hats, to give the impression of humanized velocity. > [!example] > ![[image-59.png]] > A subdivided hi-hat generator patch.