Codigo:
# sample hip_ho, make a hip hop test with sonic pi

path = "./samples/hip_ho.wav"
duration = sample_duration path, beat_stretch: 8
use_bpm 60

fx_mix = 0.4
live_loop :strings do
with_fx :slicer, phase: 0.125, wave: 0, mix: fx_mix do
sample path, beat_stretch: 8, pan: [0, -0.2, 0.2].choose, rate: [1, 1, 1, 1, -1, -1].choose
end

sleep duration
fx_mix += 0.05 if fx_mix < 0.9
end

sleep 24
use_bpm 85

with_fx :reverb, mix: 0.09 do
live_loop :hihat do
sample :drum_cymbal_open, attack: 0.01, sustain: 0, release: 0.1, amp: 0.15
sleep 0.5
end

live_loop :bd do
sample :bd_haus, cutoff: 100, amp: 0.49
sleep 0.5
sample :bd_haus, cutoff: 100, amp: 0.45 if one_in(3)
sleep 1
end

live_loop :sd do
sleep 2
sample :drum_snare_hard, amp: 0.55
end
end

amp = 0.5
cutoff_low = 50
cutoff = 60

sleep 34
live_loop :bass do
use_synth :saw
sync :sd

16.times do
play :g2, attack: 0.1, sustain: 0.6, release: 0.5, cutoff: cutoff_low, amp: amp
sleep 1
play :d2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5
play :g2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5

play :a2, attack: 0.1, sustain: 0.6, release: 0.5, cutoff: cutoff_low, amp: amp
sleep 1
play :e2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5
play :a2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5

play :f2, attack: 0.1, sustain: 0.6, release: 0.5, cutoff: cutoff_low, amp: amp
sleep 1
play :c2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5
play :f2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5

play :g2, attack: 0.1, sustain: 0.6, release: 0.5, cutoff: cutoff_low, amp: amp
sleep 1
play :d2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5
play :g2, attack: 0.1, sustain: 0.3, release: 0.2, cutoff: cutoff, amp: amp
sleep 0.5
end
end

sleep 32
live_loop :hihat do
sample :drum_cymbal_open, attack: 0.01, sustain: 0, release: 0.08, amp: 0.07
sleep 0.25
end