RubyConf in 22 Minutes video just posted by @greggpollack, featuring my handsome mug! I give the elevator pitch version of our Jemini talk.
http://blog.envylabs.com/2009/12/rubyconf-videos/
Read more...Processing on Acid...
Got Ruby-Processing working with external libraries, so I can finally try it out with Ruby On Acid! My problem was that I couldn’t (or didn’t know how to) set the ruby load path with ruby-processing’s included “rp5” tool. But on Marc Chung’s advice, I tried loading it into vanilla JRuby (had to do a small hack, but it worked). From there I was able to set $RUBYLIB, include it from a gem, whatever.
It’s fast, too, at least compared to wxRuby on MRI 1.8.7. My dual-core MacBook can draw 3000 shapes a second without breaking a sweat.
OK, so here’s how to try it out yourself:
Save to acid_sketch.rb:
require 'rubygems'
require 'ruby-processing'
require 'rubyonacid/factories/meta'
require 'rubyonacid/factories/combination'
require 'rubyonacid/factories/constant'
require 'rubyonacid/factories/flash'
require 'rubyonacid/factories/loop'
require 'rubyonacid/factories/random'
require 'rubyonacid/factories/repeat'
require 'rubyonacid/factories/sine'
require 'rubyonacid/factories/skip'
class Sketch < Processing::App
def setup
@f = create_factory
@resetter = RubyOnAcid::SkipFactory.new(0.9999)
background 0
smooth
ellipse_mode CENTER
rect_mode CENTER
end
def draw
10.times do
fill(
@f.get(:red, :max => 255),
@f.get(:green, :max => 255),
@f.get(:blue, :max => 255),
@f.get(:alpha, :max => 255)
)
no_stroke
ellipse(
@f.get(:x, :max => width),
@f.get(:y, :max => height),
@f.get(:width, :max => 100),
@f.get(:height, :max => 100)
)
@f.reset_assignments if @resetter.boolean(:reset)
end
end
def create_factory
random_factory = RubyOnAcid::RandomFactory.new
source_factories = []
#Loop factories loop from 0.0 to 1.0 (or 1.0 to 0.0 if the increment value is negative).
source_factories << RubyOnAcid::LoopFactory.new(0.01)
source_factories << RubyOnAcid::LoopFactory.new(-0.01)
source_factories << RubyOnAcid::LoopFactory.new(0.001)
source_factories << RubyOnAcid::LoopFactory.new(-0.001)
#Constant factories always return the same value,
source_factories << RubyOnAcid::ConstantFactory.new(rand)
source_factories << RubyOnAcid::ConstantFactory.new(rand)
source_factories << RubyOnAcid::FlashFactory.new(rand(100))
#Sine factories produce a "wave" pattern.
source_factories << RubyOnAcid::SineFactory.new(0.1)
source_factories << RubyOnAcid::SineFactory.new(-0.1)
source_factories << RubyOnAcid::SineFactory.new(0.01)
source_factories << RubyOnAcid::SineFactory.new(-0.01)
#A RepeatFactory wraps another factory, queries it, and repeats the same value a certain number of times.
source_factories << RubyOnAcid::RepeatFactory.new(
RubyOnAcid::LoopFactory.new(random_factory.within(:increment, -0.1, 0.1)),
random_factory.get(:interval, :min => 2, :max => 100)
)
source_factories << RubyOnAcid::RepeatFactory.new(
RubyOnAcid::SineFactory.new(random_factory.within(:increment, -0.1, 0.1)),
random_factory.get(:interval, :min => 2, :max => 100)
)
#A CombinationFactory combines the values of two or more other factories.
combination_factory = RubyOnAcid::CombinationFactory.new
2.times do
combination_factory.source_factories << source_factories[rand(source_factories.length)]
end
source_factories << combination_factory
#The MetaFactory pulls requested value types from the other factories.
meta_factory = RubyOnAcid::MetaFactory.new
meta_factory.factory_pool = source_factories
meta_factory
end
end
Processing::SKETCH_PATH = ""
Sketch.new :title => "Ruby On Acid", :width => 800, :height => 600, :full_screen => falsejay@dandelion:~/Projects/ruby-processing $ sudo jruby -S gem install ruby-processing jay@dandelion:~/Projects/ruby-processing $ sudo jruby -S gem install rubyonacid jay@dandelion:~/Projects/ruby-processing $ jruby acid_sketch.rbRead more...
RubyConf wrapup...
RubyConf was awesome, and I’d like to think we made our contribution. The Jemini talk generated a lot of interested questions, and I’m pretty happy with the approach of using a screencast instead of slides (though we’ll see how it turns out in the Confreaks video). Last night Logan and I set up in the lobby with Life-Tank and our collection of XBox controllers, which attracted quite a few players and comments of “I gotta try this library when I get home”.
Enjoyed the Bay Area Computer Music Technology meetup at Pier 38, too. Got to promote Ruby On Acid, too. I showed off the usual graphical stuff, then the 8-bit PCM/WAV (“drunk Atari 2600”) sound and MIDI demos that I hacked together for the meetup. The audio demos need some experimentation before they’re ready for prime time, but I’d say the same of most things shown that evening. The other presenters clearly had more music composition education and/or experience, but I got a surprisingly warm reception anyway.
Had a lot of fun in SF. Great conference, great city, great people. If the right company is hiring I will definitely consider moving here.
Read more...How not to dine in San Francisco...
The plan was sushi, Golden Gate, jazz bar, hotel. When Logan and Stacey and their 18-month-old joined us, it became sushi, hotel (kid needs his sleep), golden gate, jazz bar, hotel.
What finally happened, though, was french cuisine, impound lot, hotel.
Read more...Sound waves on acid...
Looks like I’ll be talking on using Ruby on Acid for audio at a meetup in San Francisco during RubyConf. So, time to make sure it can actually do audio. :)
This would probably horrify anyone with audio programming experience, but: I just write a bunch of bytes ranging 0-255 to a file, then import into audacity as raw 8-bit PCM data.
require 'rubygems'
require 'rubyonacid/factories/meta'
require 'rubyonacid/factories/constant'
require 'rubyonacid/factories/flash'
require 'rubyonacid/factories/loop'
require 'rubyonacid/factories/modulo'
require 'rubyonacid/factories/random'
require 'rubyonacid/factories/repeat'
require 'rubyonacid/factories/sine'
require 'rubyonacid/factories/skip'
def generate_factories
random_factory = RubyOnAcid::RandomFactory.new
factory_pool = []
#Loop factories loop from 0.0 to 1.0 (or 1.0 to 0.0 if the increment value is negative).
factory_pool << RubyOnAcid::LoopFactory.new(random_factory.within(:increment, -0.01, 0.01))
#Constant factories always return the same value,
factory_pool << RubyOnAcid::ConstantFactory.new(rand)
factory_pool << RubyOnAcid::ConstantFactory.new(rand)
factory_pool << RubyOnAcid::FlashFactory.new(rand(100))
#Sine factories produce a "wave" pattern.
factory_pool << RubyOnAcid::SineFactory.new(random_factory.within(:increment, -0.01, 0.01))
factory_pool << RubyOnAcid::RepeatFactory.new(
RubyOnAcid::LoopFactory.new(random_factory.within(:increment, -0.1, 0.1)),
random_factory.within(:interval, 2, 100)
)
factory_pool << RubyOnAcid::RepeatFactory.new(
RubyOnAcid::SineFactory.new(random_factory.within(:increment, -0.1, 0.1)),
random_factory.within(:interval, 2, 100)
)
factory_pool << RubyOnAcid::ModuloFactory.new(RubyOnAcid::LoopFactory.new(0.00001))
factory_pool
end
#A skip factory, in charge of randomly resetting the meta factory.
@resetter = RubyOnAcid::SkipFactory.new(0.99995)
factory = RubyOnAcid::MetaFactory.new
factory.factory_pool = generate_factories
File.open("raw_audio.dat", "w") do |file|
loop do
channel_count = factory.within(:chanel_count, 0, 3).to_i
channel_count.times do |i|
file.putc factory.within(i, 0, 255).to_i
end
if @resetter.boolean(:reset)
factory.factory_pool = generate_factories
factory.reset_assignments
end
end
endThe result is a tour of every sound ever emitted by an Atari 2600:
I also have a MIDI experiment going. Neither is spectacular, but the nice part is that the programs needn’t change; I just need better generators.
Read more...