source code for https://soundcloud.com/greippi/rental-advisory

rentaladvisory.c

#include <stdint.h>
#include <stdio.h>

typedef union {
    float f;
    uint32_t i;
    char b[4];
} rawfloat;

inline static float tune (uint32_t t) {
    return ((((t >> ((t >> 16) + 1) * ((t << 2) >> (t >> ((t >> 13 & 1) ? 4 : 13)))) >> ((t << 21) & 1 ? ((t >> 2) & 0xf) : 0)) & 0xff) >> 1) / 255.0;
}

inline static float beat (uint32_t t) {
    return (((t >> 2 & 0xffff) & (((t >> 2 & 0xffff) >> 4) & ((t >> ((t >> 18) & 0xf) & 0xffff) >> 3))) ? 127 : 0) / 255.0;
}

int main (int argc, char** argv) {
    rawfloat rf;
    
    float s;
    float dc_in = 0;
    float dc_out = 0;
    
    for (uint32_t t = 0; t < (1 << 23); ++t) {
        rf.f = 0;
        s = 0;
        s += tune (t);
        s += beat (t);
        dc_out = 0.999f * dc_out + s - dc_in;
        dc_in = s;
        rf.f += dc_out;
        
        for (int i = 0; i < 4; ++i) {
            putchar (rf.b[i]);
        }
    }
    
    return 0;
}