Common Understanding:

When we talk about "Mobile/Buds/Speakers," we're delving into the world of Bluetooth functionality, with a particular focus on audio, specifically, the act of listening to music through Bluetooth devices.

Introduction to Bluetooth:

Before we delve into the core of this discussion, allow me to inquire:

do you know how to use Bluetooth?

~~ Yes, buddy, I use it every day. I turn ON the Bluetooth in mobile settings and TURN ON Bluetooth on my neckband /earbud /speaker /another mobile and connect them.

Great, but what do you mean by connecting them?

~~ Connecting means both Bluetooth (BT) devices discover each other and can transfer music, data, or files exclusively between themselves.

Excellent! Now that we've established your familiarity with Bluetooth, let me provide you with an introduction to Bluetooth—how it functions, its various types, and its applications. So, in simple terms, there are two types of Bluetooth based on functionality:

1) Classic Bluetooth: This is where the Bluetooth journey began. It's available in almost every device that supports Bluetooth, such as your current phone, earbuds, and speakers.

2) Low Energy Bluetooth: Also known as Bluetooth Low Energy (BLE), it's more power-efficient than Classic Bluetooth. While it's widely used, awareness of it remains relatively low. Devices like smartwatches and select smart home gadgets embrace BLE technology.

For better comprehension, we can say BLE serves two distinct use cases:

a) Unicast Low Energy Audio: Unicast LE Audio.

b) Broadcast Low Energy Audio: Broadcast LE Audio.

Now, we've identified three Bluetooth types: Classic, Unicast LE Audio, and Broadcast LE Audio. Let's delve deeper into their specifics.

1) Classic BT:

In the realm of Classic Bluetooth, you connect two devices, facilitating activities such as file sharing, music listening, or remote control via a smartwatch, among others. Consider this scenario: Your devices A and B are interconnected. A is sending files to B. Ever wondered how these files are sent?

=> A converts the files into a radio wave format, akin to a radio FM signal, and transmits them into the air saying I'm sending it to B.

=> B scans for the radio wave bearing the identifier of A and deciphers the transmitted data (meaning data is received by B or music is played on B).

=> B sends back a message to A stating that it has received the files and no further transmission is required.

=> A scan messages sent by B stops redundant data transmission. The essential point here is that in connected case of Device A & B, both sends data with prefix that I'm sending data for A or B and so only A & B can read respective data from air radio packets. Furthermore, with Classic BT, you can connect to a maximum of two devices, and data is sent serially, not in parallel.

2) Low Energy Bluetooth (Unicast):

Unicast Low Energy Bluetooth introduces a different chipset compared to Classic BT. It extends its reach to connect with up to 31 devices. However, much like Classic Bluetooth, data transmission occurs sequentially, not concurrently.

3) Low Energy Bluetooth for Audio (Broadcast):

Now, let's shift our focus to Broadcast Low Energy Audio, which is the central topic of this article. Unlike its counterparts, Broadcast Bluetooth does not establish connections between devices. In Classic and Unicast Bluetooth, devices connect and transmit data with specific recipient names. However, Broadcast Bluetooth takes a different approach. There are no connections between Bluetooth devices.

As the term "broadcast" suggests, data is sent out broadly, available for anyone to receive. Let's explore how this works within the context of audio data.

Using Broadcast Bluetooth for Audio:

Consider this scenario:

- You have a mobile device that supports Broadcast Bluetooth.

- You also have multiple pairs of earbuds, speakers, or other Bluetooth music devices, all compatible with Broadcast Bluetooth.

Here's the process:

1. Your mobile device and the other Bluetooth devices are not interconnected; remember, there's no need for connections.

2. You initiate music playback on your mobile, and you can hear it through your mobile's built-in speaker.

3. You access your mobile's Bluetooth settings and activate "Start Broadcast."

4. Your mobile transforms the music into radio wave packets and broadcasts it into the air under the name you've assigned. After this step, you won't hear any sound from your mobile's speaker.

5. Turn on your earbuds, speakers, or other devices—they will automatically start playing the audio from your mobile.

Importantly, your mobile doesn't send data specifically to any particular device, unlike in Classic and Unicast Bluetooth. Instead, it broadcasts the data generically for anyone to receive. any number of device can read that data means any number of people can listen music.

Please note that while other Bluetooth devices can read the broadcast data, they cannot send messages back to the broadcaster to indicate data receipt.

Breaking Down the Setup with an Example:

Imagine this scenario: You have a mobile and three pairs of earbuds. You initiate a broadcast from your mobile with the name "HindSongs," and all three pairs of earbuds start tuning in to this broadcast.

Now, suppose your friend arrives and starts their own broadcast from their mobile device with the name "EnglishSongs." Suddenly, you have two broadcasting mobile devices and three pairs of earbuds—all in the same space.

One might wonder—won't the earbuds become perplexed in choosing which broadcast to listen to? Indeed, they will. When multiple broadcasting devices are in proximity, the earbuds may struggle to determine which broadcast to select. Solutions:

To address this issue, two solutions emerge: 1. Sequential Selection: Devices can be configured to select the first broadcast they encounter—essentially, a "first come, first served" approach.

2. Screen-Assisted Selection: Alternatively, a device equipped with a screen and Broadcast Bluetooth but not actively broadcasting can assist. This device scans and displays all available broadcasts in the vicinity, allowing users to make a deliberate choice.

Imagine a scenario: You have a mobile device broadcasting "HindiSongs," your friend has a mobile device broadcasting "EnglishSongs," and you possess a screen-equipped device connected to all three pairs of earbuds. This screen-equipped device can display all available broadcasts, similar to when you search for Wi-Fi networks. You select "HindiSongs," and the earbuds tune in to that specific broadcast.

Crucially, no actual connections are established between the "HindiSongs" broadcast and the earbuds. They simply tune in and listen.

Use Cases:

Now that we've explored Broadcast Bluetooth and its intricacies, let's examine some practical applications:

1 Watching Movies Together at Home:

Imagine the TV broadcasting, and you're listening through your earbuds at your chosen volume level.

2 In the Gym:

You can play motivating workout music over Broadcast Bluetooth. Those with earbuds can hear the audio, while others in the vicinity remain undisturbed.

3 Public Information:

Silent TVs at airports, railway stations, and other public places can transmit audio packets via Broadcast Bluetooth. Passengers and visitors can listen to announcements and information through their Bluetooth earbuds without any noise disturbance.

4 Pubs/Bar and Music Theme Gatherings:

Everyone can listen at their preferred volume and enjoy their choice of songs.

This feature opens up a whole new world. :) Okie, thanks for reading.