Splay Overview

SPLAY is Murmur’s mastering plugin: a 5-band Mid/Side array processor with width, rotation, interaural time-difference, and depth-tilt control per band, plus an AI mastering assistant with two tiers.

Signal path

INPUT

Stereo

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CROSSOVER TREE

Up to 5 bands, Linkwitz-Riley

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PER-BAND M/S PROCESSING

Encode -> Width -> Rotation -> ITD -> Depth tilt -> Correlation-safe limiter -> Decode

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SUM BANDS

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OUTPUT

Full parameter reference: SPLAY parameters (27 real, automatable parameters).

AUTO vs. CURATE

• AUTO — local, free, offline. Runs a rule-based master on ~8 seconds of the source. Nothing touches the network.
• CURATE — uploads only the small analysis JSON AUTO already computed (plus the rule-based starting preset); a cloud AI pass refines it, bounded to small moves and re-clamped to SPLAY’s real parameter schema. No audio leaves your machine.

See Murmur Cloud for how CURATE fits into the broader API.