Interactive Layers

An engine needs layers that stand alone and can be switched at any bar

Related

StemsDAW

The problem

Hand a game team a finished mix and they cannot use it. The engine needs to add drums in combat, leave only low end in stealth, fade out under a story beat. That requires clean layers with one start point, one length and one level. Generation tools deliver a finished mix, and separating it afterwards often takes longer than rebuilding it.

How it works

Engine mixing differs from DAW mixing. It switches stems on and off at runtime with nobody riding a fader, so every layer must sound complete on its own and still fit when stacked. Level differences between layers have to be designed in advance, or the combat layer buries dialogue the moment it starts. Loop points, silence and tails must be stated in the file rather than guessed. Layers are divided by function, not by instrument; a single cello may belong to both the low layer and the melody layer.

Practice

Split by function, low end, harmony, melody, percussion, atmosphere, one stereo file each, with matching sample rate and bit depth. Start every layer at the same bar and keep lengths to whole bars. Avoid long reverb inside a layer and leave tails in the final bar. Name files with project, state, layer, BPM, key and version. Listen to each layer alone before delivery, then to all of them together. Keep the count to five or six; beyond that neither the engine nor the team can track them. Ship a note that maps every layer to its states.

What to listen for

In Beethoven's String Quartet No. 15, how four instruments stay independent and still cohere; in the Bach chorale, how clearly the four voices enter and leave; in the loop version of quantum-2, how electronic layers keep one groove by adding and removing elements. The test of a layer is whether it stands alone.

Sources

• 交互分层的文件组织与电平设计，依游戏音频通识核对，未抄原文
• Interactive layer organization and level design, checked against general game audio practice, not copied

Used for fact-checking only; all prose is original.