Hey there! This is a common ask, and while Telegram doesn’t let bots directly push custom notification sounds to users’ devices, there are a couple of practical workarounds to get the behavior you want:

1. 引导用户手动设置专属通知铃声（最可靠） #

Telegram has a built-in "Custom Notifications" feature that lets users assign unique sounds to specific chats/bots. You can guide your users through these steps to link your bot to your desired siren sound:

• Open the chat with your bot
• Tap the three-dot menu in the top right corner
• Select Notifications > Custom notifications
• Toggle on "Custom notifications"
• Under "Sound," choose the siren audio file they’ve already imported to their device (most mobile OS let users add custom ringtones/notification sounds)

You can automate this guidance by having your bot send a step-by-step message when users first interact with it, or when they ask about custom sounds.

2. 发送带提示音的媒体消息作为补充提醒 #

While this doesn’t replace the system notification ringtone, you can send short audio clips of your siren sound alongside your bot’s notifications. Here’s how to implement this via the Bot API:

• Use the sendAudio method, and set the caption to your actual notification content
• To make this more effective, you can encourage users to enable "Auto-play media" for your bot’s chat (they can find this in the same Custom Notifications settings menu)

This way, when your bot sends a message, the siren audio will play automatically (if enabled) in addition to the system notification (which they can set to silent if they prefer only the siren).

Important Limitation to Note #

Telegram’s Bot API does not provide a way to programmatically modify a user’s notification sound settings. This is intentional—notification preferences are considered user-specific privacy settings, so bots can’t alter them without explicit user action.

内容的提问来源于stack exchange，提问作者Lorenzo