diff --git a/src/commands/record.ts b/src/commands/record.ts
index 3881f91..2893409 100644
--- a/src/commands/record.ts
+++ b/src/commands/record.ts
@@ -3,11 +3,13 @@ import { AbstractCommandNoResponse } from './abstractCommand'
 
 export class RecordCommand extends AbstractCommandNoResponse {
 	filename?: string
+	append?: boolean
 
-	constructor (filename?: string) {
+	constructor (filename?: string, append?: boolean) {
 		super()
 
 		this.filename = filename
+		this.append = append
 	}
 
 	serialize () {
@@ -17,6 +19,7 @@ export class RecordCommand extends AbstractCommandNoResponse {
 		}
 
 		if (this.filename) res.params.name = this.filename
+		if (this.append !== undefined) res.params.append = this.append ? 'true' : 'false'
 
 		return res
 	}
diff --git a/src/commands/shuttle.ts b/src/commands/shuttle.ts
new file mode 100644
index 0000000..3cd99ed
--- /dev/null
+++ b/src/commands/shuttle.ts
@@ -0,0 +1,23 @@
+import { NamedMessage } from '../message'
+import { AbstractCommandNoResponse } from './abstractCommand'
+
+export class SpeedCommand extends AbstractCommandNoResponse {
+	speed?: number
+
+	constructor (speed?: number) {
+		super()
+
+		this.speed = speed
+	}
+
+	serialize () {
+		const res: NamedMessage = {
+			name: 'speed',
+			params: {}
+		}
+
+		if (this.speed) res.params.speed = this.speed + ''
+
+		return res
+	}
+}