The difference between Bluetooth midi and Bluetooth audio

What is the difference between Bluetooth midi and Bluetooth audio or Bluetooth audio?

First of all, it is divided into three concepts, that is, what is Bluetooth? What is Bluetooth midi? What is Bluetooth audio?

1. What is Bluetooth? There is no need to go into details on this, everyone knows it.
2. What is Bluetooth midi? Most people who ask this question basically understand that Bluetooth midi is actually expanded to a wireless connection based on the standard midi protocol. The original midi was transmitted by USB, but now it is replaced by Bluetooth.
3. What is Bluetooth audio? This one is even simpler. Everyone has been exposed to Bluetooth speakers or Bluetooth headsets. It is this thing that connects to a mobile phone to play the audio on the mobile phone.

Detailed description

Here we take the electric piano product as an example to explain Bluetooth MIDI in detail.

Bluetooth MIDI is actually promoted and applied by Apple to achieve wireless connection between the host and the device with the help of low-power Bluetooth. The standards of the agreement are also set by Apple. It is now fully applied to the Android platform.

The core is that the mobile phone sends the “Bluetooth midi code” through Bluetooth to the sound source chip, and then outputs the sound after decoding.

The following describes the use process of both:

1. How to use Bluetooth MIDI: Note that on the mobile phone, you need to open Bluetooth and positioning permissions.
2. In the process of using Bluetooth audio, the electric piano can be understood as a “Bluetooth speaker”, and the mobile phone directly sends Bluetooth audio data. Directly decode and play the Bluetooth module in the electric piano. Note that this has nothing to do with the “sound source chip”.

Recommended Bluetooth module-GYBT401

1. GYBT401 Bluetooth module supports Bluetooth 5.0, dual-mode, standard Bluetooth MIDI protocol, realizing the transmission of MIDI data and mobile phones through the serial port.
2. Convert the MIDI signal through the serial port into a signal that can be recognized by the APP, and transmit it to the APP through the Bluetooth protocol.
3. Supports Bluetooth audio, which means connecting to a mobile phone to play music on the mobile phone. Supports DAC output and I2S host output.
4. Bluetooth protocol: Bluetooth 5.0 supports HFP/A2DP/AVRCP/HSP/GAVDP/IOP/SPP/BLE, with a distance of 10M.
5. Support Bluetooth MIDI service: 20mA in standby and 30mA in playback.

Dongguan Geyuan Electronics Co., Ltd. is a high-tech company specializing in the research and development and sales of voice chips. All personnel have profound industry backgrounds. The company is engaged in voice chip research and peripheral circuit development; at the same time, we formulate voice product development plans for customers with special needs, and implement the plans to complete product development, testing, sound processing, and a series of services including product practical application guidance. . The business scope involves automotive electronics (such as reversing radar\anti-theft devices), multimedia (such as advertising machines), home anti-theft (such as voice prompts), toys, electronic products, etc.