Ruby DSL for music live coding in the browser, you can play with it in the online editor

DISCLAIMER: This is pretty alpha, so use with care if you plan to use it for real performances... Otherwise have fun!

Chat is available in gitter: nega-sonic/Lobby if you have any questions/suggestions

You can use plain normal or midi notes

# playing a single note
play 42

# multiple notes
play 'E3', 42

# produces the same result as the above
play 'E3'
play 42

# Scales and chords (same as Sonic-pi)
play (scale :c, :major)
play (chord :d, :minor)

Under the hood we use a 'fixed' time for calculating notes durations, adding more notes or play statements will make durations shorter. This happens because each play happens inside a cycle. A cycle's duration is around 3 seconds

# doing this
play 'E3'
play 42

# is the same as this
cycle do
  play 'E3'
  play 42
end

If you want to play notes at the same time then use multiple cycles

cycle do
  play 'E3'
end

cycle do
  play 42
end

With with_instrument you can add a synthesizer and connect it with effects. Every instrument needs to have a name (for performance reasons)

# The order of the effects will affect the final sound
with_instrument(:drums, synth: :membrane, fx: [:bit_crusher, :distortion]) do
  # each instrument has its own cycle by default
  play 30
  play 64
end

# multiple cycles can be used here as well
with_instrument(:lead, synth: :am, fx: :freeverb, volume: 3) do
  cycle do
    play (scale :c, :major)
  end

  cycle do
    play (scale :c, :pelog)
  end
end

It is possible to modify the default values for effects, you can do this trough the fx block. Options for each effect are detailed in the Effects section.

drum_effects = fx do
  bit_crusher bits: 3
  distortion value: 1.3
end

with_instrument(:drums, synth: :membrane, fx: drum_effects) do
  4.times do
    play 30
    play 64
  end
end

• :expand for a longer duration. Integer value
• :every plays every 'nth'. For example this: cycle(every: 3) will play every third cycle. Integer value
• :sustain reduce/augment the duration of notes. Float value between 0 and 1
• :probability play or miss a note randomly. Float value between 0 and 1
• :humanize boolean value

• :membrane Use it as drums
• :simple
• :am
• :fm
• :duo
• :mono
• :metal
• :pluck
• :poly

• random drums
• arabian space
• supernintendo gangsta
• dancing in china

• Using every is pretty unstable at the moment, even more if you use it in combination with expand
• Adding too much notes on a cycle causes the page to crash ( like doing 100.times do { play 30, 50, 60 } )
• Page crashes also when you have a lot of cycles and you hit the 'play' button to fast (fixing this soon™)

Bug reports and pull requests are welcome on GitHub at https://github.com/merongivian/negasonic.

The gem is available as open source under the terms of the MIT License.