Linear Congruential Generator for Monome Crow 3

crow3-lcg.lua

-- LCG based on https://github.com/monome/dsp-kit/blob/main/noise/lcg.c by @catfact
-- due to differences in data types, the behavior is not the same.
-- int32_t values were truncated to avoid Lua converting them to inf or -inf.
output[1].action = loop {
    to(
        dyn{x=1}
            :mul(dyn{a=-559})
            :step(dyn{c=21032})
            :wrap(-32768, 32767)
            / 32768
            * math.abs(dyn{amp=10}
                :step(dyn{ampstep=0.01})
                :wrap(-10, 10)),
        0
    ),
    to(
        dyn{x=1}/ 32768 * math.abs(dyn{amp=10}),
        dyn{time= 2.986e-5 }
    )
}

-- some values to try out
output[1].dyn.a = 28772.0
output[1].dyn.c = 5221.0
output[1].dyn.time = 0.00233

output[1].dyn.ampstep = 0.0001
output[1].dyn.a = 28772.0
output[1].dyn.c = 8231.0
output[1].dyn.time = 0.000031

output[1].dyn.a = 29272.0