Progressing drum beats

General
1

I’ve been working on a drum machine that changes beats during a song/track.

It’s almost there… the pattern does change, and you can choose the beats by
careful selection of your patterns beforehand.

But somethings not quite right in the durations, which I can’t put my hand to…

use_bpm 120

drum_pattern = (ring 234, 1293, 33536, 3453, 234, 3763, 1293, 3872, 1293, 234)
drum_duration = (ring 4,4,8,4,4,8,16,16,16,16)

set :pattern, drum_pattern.look
set :duration, drum_duration.look

live_loop :drums do
  
  this_pattern = get :pattern
  this_duration = get :duration
  
  use_random_seed this_pattern
  
  puts this_pattern
  puts this_duration
  
  this_duration.times do
    
    sample :bd_haus if one_in(3)
    sample :sn_dolf if one_in(5)
    sample :drum_cymbal_closed if one_in(2)
    sleep 0.5
  end
end

live_loop :controller do
  this_duration = get :duration
  sleep this_duration-1
  set :pattern, drum_pattern.tick
  set :duration, drum_duration.tick
  sleep 1
end

Eli…

2

Added a simple ’ ride ’ and all seems on time ?
‘’
use_bpm 120
drum_pattern = (ring 234, 1293, 33536, 3453, 234, 3763, 1293, 3872, 1293, 234)
drum_duration = (ring 4,4,8,4,4,8,16,16,16,16)
set :pattern, drum_pattern.look
set :duration, drum_duration.look
live_loop :drums do
this_pattern = get :pattern
this_duration = get :duration
use_random_seed this_pattern
puts this_pattern
puts this_duration
this_duration.times do
sample :bd_haus if one_in(3)
sample :sn_dolf if one_in(5)
sample :drum_cymbal_closed if one_in(2)
sleep 0.5
end
end
live_loop :controller do
this_duration = get :duration
sleep this_duration-1
set :pattern, drum_pattern.tick
set :duration, drum_duration.tick
sleep 1
end

live_loop :ride do
synth :dull_bell, note: 93, release: 0.3, amp: 0.3
sleep 0.5
end

``

3

I could have only suggested that you might want an explicit sync to make the drums and controller thread guaranteed to execute in a certain order. Though on first glance it does not look like it should matter.

4

You have two ticks in the controller loop, that might be it.

5

Does it sound as if with a problem to you ?

6

Hi David.

Looks like you got it. :slight_smile:
Thats what I get for writing code at 3
a.m. after a few Bacardi’s.

EDIT: And I also missed a tick higher up.

sample :drum_cymbal_closed if spread(3,16).tick

Ah well.

Eli…