/**
 * Channel layout conversion.
 */
/**
 * Downmixes to a single channel.
 *
 * Averages rather than sums, so a stereo-to-mono conversion cannot clip. The
 * naive `L + R` overflows on anything approaching full scale and is a common
 * source of distortion in "convert to mono" features.
 */
export declare function toMono(channels: readonly Float32Array[]): Float32Array[];
/** Upmixes or downmixes to exactly two channels. */
export declare function toStereo(channels: readonly Float32Array[]): Float32Array[];
/**
 * Remaps channels by index.
 *
 * `mapChannels(audio, [0, 0])` duplicates the left channel to both sides;
 * `[1, 0]` swaps them.
 */
export declare function mapChannels(channels: readonly Float32Array[], mapping: readonly number[]): Float32Array[];
/**
 * Converts to `count` channels, choosing a sensible strategy.
 */
export declare function toChannelCount(channels: readonly Float32Array[], count: number): Float32Array[];
/**
 * Applies constant-power stereo panning. `position` runs -1 (left) to 1 (right).
 */
export declare function pan(channels: readonly Float32Array[], position: number): Float32Array[];
/** Splits into one single-channel buffer per channel. */
export declare function splitChannels(channels: readonly Float32Array[]): Float32Array[][];
/** Merges single-channel buffers into one multi-channel buffer. */
export declare function mergeChannels(buffers: ReadonlyArray<readonly Float32Array[]>): Float32Array[];