The old computing is about what computers can do

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The old computing is about what computers can
dothe new computing is about what people can
do. - Ben Shneiderman
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The old computing is about what computers can
dothe new computing is about what people can
do. - Ben Shneiderman
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Motivation

• programming the passage of time
• specifying / controlling
• reasoning about time in code
• flexible granularity
• concurrency
• parallel
• easy to program
• precise granular
• gain insight about audio programs
• make audio programming more accessible
• further enable rapid experimentation

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Code Musical instrument
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(No Transcript)
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ChucK Facts

• text-based, general-purpose programming
• tailored for real-time audio synthesis and
  analysis
• open-source, cross-platform
• designed from the ground-up
• high-level syntax, low-level control

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Chistory-1
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Chistory-2
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Chistory-3
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Flexibility, readability trumps performance
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Core Language Features
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gt
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Controlling Time
Impulse i gt dac

• // infinite time loop
• while( true )
• // set the next sample
• 1.0 gt i.next
• // advance time
• 100ms gt now

demo
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Advancing Time

• time stands still until you advance it
• two semantics for advancing time
• chuck to now
• 1second gt now
• wait on event
• event gt now
• you are responsible for keeping up with time
• time sound

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Concurrency

• implemented using shreds
• resemble non-preemptive threads
• automatically synchronized by time!
• can work at low and high level

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Strongly-timed

• what it means
• programs have precise control over their own
  timing
• sample-synchronous control may be asserted at any
  time
• for any unit generator
• transfer primary control over time
• from implicit scheduling to the language
• program flow time flow
• staying in the language
• express more from within the language
• provide natural modularity for on-the-fly programs

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ChucK Virtual Machine
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ChucK Virtual Machine
Code (foo.ck)
Code (foo.ck, bar.ck)
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On-the-fly Programming(running with sonic
scissors)
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(n.) the act of modifying the
logic and structure of a program during runtime,
for the purpose of rapid experimentation, and
exerting expressive control. (also live coding)
on-the-fly programming
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• The League of Automatic Composers (1974)

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demo
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The Audicle
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Hmm-1
Editor
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Hmm-2
Editor
Debugger
Compiler
VM
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demo
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Language Design Solutions

• make time itself computable
• time and duration native types
• allow a program to be self-aware in time
• allow code to schedule itself
• synchronize concurrency by time or by events
• automatically (by time)
• manually (using events, also sample-synchronous)
• hide the mundane, expose true control.
• do it on-the-fly!

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• http//chuck.cs.princeton.edu/

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