Create guide for seeking audio resource

guide/.vuepress/sidebar.ts

@@ -21,6 +21,7 @@ export default {
 				'/voice/voice-connections.md',
 				'/voice/audio-player.md',
 				'/voice/audio-resources.md',
+				'/voice/seeking.md'
 			],
 		},
 	],

guide/voice/seeking.md

@@ -0,0 +1,44 @@
+# Seek
+
+discord.js does not have a built-in method for seeking audio resources. However external libraries such as `prism-media` can be used to tackle this issue.
+
+### Sample code 
+
+To seek resource, you can create a new function with  the following code:
+
+```js
+// Require necessary package
+const prism = require('prism-media');
+
+function createFFmpegStream(stream, seek) {
+	let seekPosition = '0';
+	if (seek) seekPosition = String(seek);
+	const transcoder = new prism.FFmpeg({
+		args: ['-analyzeduration', '0', '-loglevel', '0', '-f', 's16le', '-ar', '48000', '-ac', '2', '-ss', seekPosition, '-ab', '320',],
+	});
+	const s16le = stream.pipe(transcoder);
+	const opus = s16le.pipe(new prism.opus.Encoder({ rate: 48000, channels: 2, frameSize: 960 }));
+	return opus;
+}
+```
+The first argument for this function should be audio stream, and second one should be int within duration of the stream.
+The function returns the seeked stream. For more configuration options you can look at the [prism media documentation](https://amishshah.github.io/prism-media/).
+
+### Complete Code
+
+```js
+const { createAudioResource, createAudioPlayer } = require('@discordjs/voice');
+const fs = require('fs');
+
+const player = createAudioPlayer();
+const normalAudioResource = createAudioResource('Your audio file path');
+
+player.play(normalAudioResource);
+
+const seekedAudioStream = createFFmpegStream(fs.createReadStream('Your audio file path'), 10); // Seek to 10s
+const seekedAudioResource = createAudioResource(seekedAudioStream);
+
+player.play(seekedAudioResource);
+```
+
+The first argument of the `createFFmpegStream` method would be your stream.