From 2ef7f7c26559e9424c5c8724095f35bac6cccc19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antonio=20Rom=C3=A1n?= <kyradiscord@gmail.com>
Date: Mon, 31 May 2021 14:43:23 +0200
Subject: [PATCH] feat(filters): added `channelMix` and `lowPass` (#27)

---
 src/types/OutgoingPayloads.ts | 53 +++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/src/types/OutgoingPayloads.ts b/src/types/OutgoingPayloads.ts
index 947f9856..718bc454 100644
--- a/src/types/OutgoingPayloads.ts
+++ b/src/types/OutgoingPayloads.ts
@@ -189,6 +189,16 @@ export interface OutgoingFilterPayload extends BaseOutgoingPayload {
 	 * {@link https://en.wikipedia.org/wiki/Panning_(audio) Audio Panning}.
 	 */
 	rotation?: RotationOptions;
+
+	/**
+	 * The channel mix options.
+	 */
+	channelMix?: ChannelMixOptions;
+
+	/**
+	 * The low pass options.
+	 */
+	lowPass?: LowPassOptions;
 }
 
 /**
@@ -323,3 +333,46 @@ export interface RotationOptions {
 	 */
 	rotationHz?: number;
 }
+
+/**
+ * Mixes both channels (left and right), with a configurable factor on how much each channel affects the other.
+ * With the defaults, both channels are kept independent from each other.
+ * @note Setting all factors to 0.5 means both channels get the same audio.
+ * @note This is not available in Lavalink v3.3.
+ */
+export interface ChannelMixOptions {
+	/**
+	 * The left-to-left mix, modifies the volume in the left channel.
+	 * @default 1.0
+	 */
+	leftToLeft: number;
+
+	/**
+	 * The left-to-right mix, modifies how much of the left channel goes to the right one.
+	 * @default 0.0
+	 */
+	leftToRight: number;
+
+	/**
+	 * The right-to-left mix, modifies how much of the right channel goes to the left one.
+	 * @default 0.0
+	 */
+	rightToLeft: number;
+
+	/**
+	 * The right-to-right mix, modifies the volume in the right channel.
+	 * @default 1.0
+	 */
+	rightToRight: number;
+}
+
+/**
+ * Supresses high frequencies given a frequency.
+ * @note This is not available in Lavalink v3.3.
+ */
+export interface LowPassOptions {
+	/**
+	 * The amount of smoothing done.
+	 */
+	smoothing: number;
+}