EasyAudioSequencer

I took the sample sequencer code from lsegal's easy_audio gem and created a gem out of it.

https://github.com/lsegal/easy_audio/

Installation

Add this line to your application's Gemfile:

gem 'easy_audio_sequencer'

And then execute:

$ bundle

Or install it yourself as:

$ gem install easy_audio_sequencer

Usage

require 'easy_audio'
require 'easy_audio_sequencer'

SNARE         = EasyAudioSequencer::Instruments::SNARE
BASSDRUM      = EasyAudioSequencer::Instruments::BASSDRUM
LEAD          = EasyAudioSequencer::Instruments::LEAD
LEAD2         = EasyAudioSequencer::Instruments::LEAD2
TRIANGLE      = EasyAudioSequencer::Instruments::TRIANGLE
SQUARELEAD    = EasyAudioSequencer::Instruments::SQUARELEAD
SINE          = EasyAudioSequencer::Instruments::SINE
HIHAT         = EasyAudioSequencer::Instruments::HIHAT
PHASED        = EasyAudioSequencer::Instruments::PHASED
EXP_FALLOFF2  = EasyAudioSequencer::Instruments::EXP_FALLOFF2

s = EasyAudioSequencer::Sequencer.new bpm: 43
s.add_scene :A, [
  [nil, nil, SNARE, nil],
  [EasyAudioSequencer.sn(BASSDRUM, 20), nil, nil, nil],
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
  [EasyAudioSequencer.sn(LEAD, 51), nil, nil, EasyAudioSequencer.sn(TRIANGLE,49)],
  [nil, EasyAudioSequencer.sn(SINE,20), nil, nil] * 2,
]
s.add_scene :A2, [
  [nil, nil, SNARE, nil],
  [EasyAudioSequencer.sn(BASSDRUM, 20), nil, nil, nil],
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
  [EasyAudioSequencer.sn(LEAD, 51), nil, nil, EasyAudioSequencer.sn(TRIANGLE,54)],
  [nil, EasyAudioSequencer.sn(SINE,26), nil, nil] * 2,
]
s.add_scene :B, [
  [EasyAudioSequencer.sn(HIHAT, 70), nil, nil, nil, EasyAudioSequencer.sn(HIHAT, 70), nil, EasyAudioSequencer.sn(HIHAT, 70), nil] * 2,
  [nil, nil, SNARE, nil],
  [EasyAudioSequencer.sn(BASSDRUM, 20), nil, nil, nil, SNARE, nil, EasyAudioSequencer.sn(BASSDRUM, 20), nil],
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 42)] * 4,
  [EasyAudioSequencer.sn(LEAD, 51), nil, nil, EasyAudioSequencer.sn(TRIANGLE,49)],
  [nil, EasyAudioSequencer.sn(SINE,23), nil, nil] * 2,
]
s.add_scene :C, [
  [EasyAudioSequencer.sn(HIHAT, 70), nil, nil, nil, EasyAudioSequencer.sn(HIHAT, 70), nil, EasyAudioSequencer.sn(HIHAT, 70), nil] * 2,
  [nil, nil, nil, nil, nil, SNARE, nil, nil, nil, nil],
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 49), nil, EasyAudioSequencer.sn(SQUARELEAD, 49), nil, nil, nil, EasyAudioSequencer.sn(-> { e(TRIANGLE) * 0.5 }, 54)],
  [EasyAudioSequencer.sn(BASSDRUM, 20), nil, nil, nil, nil, nil, EasyAudioSequencer.sn(BASSDRUM, 20), nil],
  [EasyAudioSequencer.sn(LEAD, 46), EasyAudioSequencer.sn(LEAD, 46), nil, nil],
  [nil, nil, nil, nil, nil, nil, nil, EasyAudioSequencer.sn(TRIANGLE,42)],
  [nil, nil, nil, nil, EasyAudioSequencer.sn(LEAD2,59), EasyAudioSequencer.sn(LEAD2,59), nil, nil],
  [EasyAudioSequencer.sn(SINE,18)],
  [EasyAudioSequencer.sn(PHASED,20)]
]
s.add_scene :D, [
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
  [EasyAudioSequencer.sn(LEAD, 51), nil, nil, EasyAudioSequencer.sn(TRIANGLE,49)],
]
s.add_scene :D2, [
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
  [EasyAudioSequencer.sn(TRIANGLE, 51), nil, nil, EasyAudioSequencer.sn(TRIANGLE,46)],
]
s.add_scene :D3, [
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
  [EasyAudioSequencer.sn(TRIANGLE, 42), nil, nil, nil],
]
s.add_scene :D4, [
  [nil, EasyAudioSequencer.sn(SQUARELEAD, 46)] * 4,
]

s.add_scene :D5, [
  [nil, EasyAudioSequencer.sn(-> { e(SQUARELEAD) * e(EXP_FALLOFF2) }, 46)] * 4,
  [EasyAudioSequencer.sn(-> { e(SQUARELEAD) * e(EXP_FALLOFF2) }, 46), nil, nil, nil, nil, nil, nil, nil]
]

# Play!
s.play scenes: %w(
  2:D5
  1:A 1:A2 2:B 4:C
  1:A 1:A2 2:B 4:C
  1:D 1:D2 1:D3 1:D4
)

Contributing

1. Fork it ( http://github.com//easy_audio_sequencer/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request