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audioGraph
audioGraph
 
 
audioGraphCore
audioGraphCore
 
 
audioGraphMgr
audioGraphMgr
 
 
audioNodes
audioNodes
 
 
audioNodes4D-1.6
audioNodes4D-1.6
 
 
audioVoiceMgr
audioVoiceMgr
 
 
conglomerates
conglomerates
 
 
objects
objects
 
 
README.md
README.md
 
 
audioUi.cpp
audioUi.cpp
 
 
audioUi.h
audioUi.h
 
 
audioUpdateHandler.cpp
audioUpdateHandler.cpp
 
 
audioUpdateHandler.h
audioUpdateHandler.h
 
 
chibi.txt
chibi.txt
 
 

README.md

libaudiograph

Open source node based sound synthesis

libaudiograph is an open source node based sound synthesis library.

Core features at a glance,

  • Embeddable,
    • Use audio graphs where you see fit, inside your own c++ applications,
    • With or without optional (real-time) editing support,
    • With the audio api of your liking.
  • Extendable,
    • Completely open source,
    • Easily create your own nodes, or hack away at existing nodes,
    • Combine libaudiograph with other libraries such as Box2D to create physisically triggered effects,
    • Optimized compile times for fast iteration.
  • Optimized for performance,
    • Optimized hybrid scalar and vector 'audio floats',
    • SIMD optimized audioBuffer functions, used for mixing and working with 'audio floats'.
  • Real-time editing,
    • Uses avgraph as the underlying graph representation,
    • Implements a real-time editing interface.

For some example of how to use audiograph inside your applications, look over here https://github.com/marcel303/framework/tree/master/audioGraph-examples.

Design philosophy

Node based editing is great for experimentation, for setting up signal flow, for experimenting without thinking so much about structure, where the creative process takes you to exploring a possibility space. Especially when combined with tools such as visual interface elements like dials and sliders which allow for quickly moving about.

Recognizing it's strengths one must also consider it's weaknesses. Popular node based systems come with two major downsides.

  1. They are closed source. Extending them is difficult. Coding is not part of the day to day process,
  2. They place the graph center stage. Sometimes it makes sense to use coding for setting up a structure, or for designing a system. Forcing one to do this through a node based system leads to a less than ideal workflow for people who know how to do code.

Graphs are not great for setting up structure. Graphs are not great for designing high performance systems. Programming languages such as C++ are more suited for this.

The main philosophy behind the avgraph project is to combine languages and use a language where it is strong. This requires one to build bridges where necessary to let the worlds of code and graphs communicate. This bridge could be an interface made using control values, where parameter sets are used as a control interface. It could also be a custom node inside the graph system which communicates directly with an underlying system in C++.

Embeddable

(todo : choosing a audio api. or rendering off-line)

(todo : initialization : you specify the audio graph manager, the voice manager, and the audio api)

Extendable

Examples of extendability

Spatial sound applications

Physics driving sound excitation

Combining libaudiograph with other systems

Optimized for performance

(todo : some performance numbers)

(todo : fine vs coarse math computations)

(todo : sse, avx and neon instructions)

Real-time editing

(todo : features : viewing wave forms. real-time editing of graphs. real-time adjustments of node values. multiple inputs)

(todo : add screenshots of the editing interface)

Examples