31 lines
1.4 KiB
Markdown
31 lines
1.4 KiB
Markdown
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# SOUND
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Primum's sound system is well integrated and robust. It comes with flexibility in mind, to enable sounds to easily change as the result of occuring gameplay.
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At the highest level, audio sources feed into a series of nodes, which eventually output to the mixer. All DSP is handled as floating point.
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The game should specify a SAMPLERATE, BUF_FRAMES, and CHANNELS.
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SAMPLERATE: samples per second
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CHANNELS: number of output channels.
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BUF_FRAMES: Number of frames to keep in the buffer. Smaller is lower latency. Too small might mean choppy audio.
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## Audio sources
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Audio sources include wav files, midi files, mod files, etc.
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## Audio instances
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Audio sources can be played multiple times after loaded into the game. Each instance
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## DSPs / nodes
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Nodes are how audio ends up coming out of the player's speakers. Only one node is specified at runtime: the master node, which outputs its inputs to the computers' speakers. It has 256 inputs.
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Each node can have any number of inputs to it, defined when the node is created.
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Nodes are run starting with the master node, in a pull fashion. The master node checks for inputs, and from each input pulls audio foward.
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Audio instances are a type of node with a single output, and can be fed directly into the master node.
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A node has inputs and outputs. All inputs into a node are mixed together, and then processed by the node. The node might clip them, apply a filter, or do any other number of things.
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## Scripting
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