1 thought on “Bluetooth BLE MIDI chip IC solution”
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Bluetooth BLE MIDI chip IC solution
. Introduction to BLE MIDI
1.1 Apple designed a MIDI protocol supporting low -power Bluetooth (BLE) in 2014, and then MMA members to MMA members The agreement was listed as an industry standard in June 2015. There is a BLE MIDI protocol. Simply put, it is the MIDI protocol that supports BLE.
1.2 Software principle is to analyze the BLE MIDI data transmitted from Bluetooth to the traditional standard MIDI data, and then output through the serial port. In the same way, the MIDI data from the serial port can also be encoded as BLE MIDI data data. Send to the mobile terminal.
The Bluetooth MIDI transmission method Category
1.3 Signal transmission schematic diagram
1.4 BLE MIDI comparison of traditional methods
Category description Jiexie
1. Wired transmission is to connect the instrument and speaker to the launch of the same instrument through a coaxial audio cable. The layout of the scene when there are multiple instruments, but the sound quality transmission loss is small, supporting multiple instruments to support multiple instruments At the same time, connect to a speaker, generally use less
2, 2.4G transmission to transmit audio to the speaker by a wireless receiving and launch method in one pair of 2.4G modules. A pair of modules cost 30 yuan About money, the transmission loss is relatively small. It supports multiple instruments to transmit to a speaker at the same time. Generally, use less
. Bluetooth transmission instruments to make a Bluetooth transmission mode. (Bluetooth speakers work in the receiving mode) The price is cheap. A chip is less than 5 yuan. The transmission loss can be acceptable. There is no problem with general products. At present, it can only support one -to -one supporting. [if!] 4. [Endif] Bluetooth MIDI
chip KT2025
through the Bluetooth BLE transmission method, transmit the audio of the instrument to the mobile phone, the mobile phone, Transfer data to Bluetooth speakers through Bluetooth. At present, only the iPhone mobile phone supports the MIDI protocol price cheap. A chip is less than 5 yuan. It uses data transmission. The loss is relatively small. Mode
. Introduction to BLE MIDI chip
2.1, chip introduction
KT2025 chip is a Bluetooth and U disk, TF card playback playback The 4 -in -one single chip, the highlight of the chip supports the playback of non -destructive music, and the simple and clear serial control function, support BLE transparent transmission, BLE MIDI, and SPP transparency function. It greatly reduces the development difficulty of embedding Bluetooth in other products.
2.2 chip parameters
Name parameters n mp3 file format 1. Support all bit rate 11172-3 and ISO13813-3 layer3 audio decoding r r r r r r r r r r r r
2. Supporting rate support (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
3. Support Normal, Jazz, Classic, POP , ROCK and other sound effects
4. Support 24 -bit DAC
USB interface 2.0 standard
UART interface standard serial port, TTL level, Potter rate, Potter rate It can be set, connecting PC requires level conversion [for example: CH340G-USB to TTL]
input voltage 3.3V-5V [7805 post-class string of a diode is best]
The rated current 20mA [Static]
low -power current u003C200UA
chip DAC driving main chip DAC can only drive headphones
working temperature work temperature [-40 degrees]-[80 degrees]
5% ~ 95%
chip model KT2025 ssop24 n 2.3 chip characteristics r
1. The chip uses SSOP24 narrow body packaging
2. The chip peripheral component is small, only 6 capacitors, 5 105,1 2P7, plus a 24M crystal tone OK
3. The chip integration is high, powerful, and supports the traditional Bluetooth MP3 function. The built -in FM radio function
4. Bluetooth audio chip solution n n n n n n n R n 5. Bluetooth number transmission solution — BLE
6. Bluetooth number transmission solution, dual-mode BLE and SPP
7, Bluetooth audio dual-mode data
8. Support Bluetooth BLE MIDI
9. Support the general AT serial instruction
2.4 Standard schematic diagram Professional term description
function remarks
Profeng function refers to the functions that all modes will have, such as the operation of sound, mute, switching mode, reset, etc. R N Music, MUSIC, and device refer to the function of inserting TF, inserting a U disk playback function
Bluetooth mode. Our Bluetooth here supports audio, but also supports BLE and SPP. R n BLE is Bluetooth communication A standard protocol. Bluetooth audio is independent
SPP. This is also a link for the Bluetooth communication protocol. That is, what the mobile phone is sent to Bluetooth, the Bluetooth is sent out through the serial port. When playing music, Bluetooth resources are not released, and Bluetooth data communication can still be performed
[if!] 4. [Endif] chip application scenario
1, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth Audio products such as: Bluetooth speakers, Bluetooth headsets, car Bluetooth, etc.
, Bluetooth digital products such as: smart door lock, car OBD detection, smart car, printer, medical equipment data collection BLE MID
3. Bluetooth digital transmission audio products such as: Bluetooth music lamp, Bluetooth broadcast
Note: If you require ultra -low power consumption, this solution is not suitable
. Summary
The more you go, the more Bluetooth uses it on musical instruments. It will also have an advantage in this field.
Bluetooth BLE MIDI chip IC solution
. Introduction to BLE MIDI
1.1 Apple designed a MIDI protocol supporting low -power Bluetooth (BLE) in 2014, and then MMA members to MMA members The agreement was listed as an industry standard in June 2015. There is a BLE MIDI protocol. Simply put, it is the MIDI protocol that supports BLE.
1.2 Software principle is to analyze the BLE MIDI data transmitted from Bluetooth to the traditional standard MIDI data, and then output through the serial port. In the same way, the MIDI data from the serial port can also be encoded as BLE MIDI data data. Send to the mobile terminal.
The Bluetooth MIDI transmission method Category
1.3 Signal transmission schematic diagram
1.4 BLE MIDI comparison of traditional methods
Category description Jiexie
1. Wired transmission is to connect the instrument and speaker to the launch of the same instrument through a coaxial audio cable. The layout of the scene when there are multiple instruments, but the sound quality transmission loss is small, supporting multiple instruments to support multiple instruments At the same time, connect to a speaker, generally use less
2, 2.4G transmission to transmit audio to the speaker by a wireless receiving and launch method in one pair of 2.4G modules. A pair of modules cost 30 yuan About money, the transmission loss is relatively small. It supports multiple instruments to transmit to a speaker at the same time. Generally, use less
. Bluetooth transmission instruments to make a Bluetooth transmission mode. (Bluetooth speakers work in the receiving mode) The price is cheap. A chip is less than 5 yuan. The transmission loss can be acceptable. There is no problem with general products. At present, it can only support one -to -one supporting.
[if!] 4. [Endif] Bluetooth MIDI
chip KT2025
through the Bluetooth BLE transmission method, transmit the audio of the instrument to the mobile phone, the mobile phone, Transfer data to Bluetooth speakers through Bluetooth. At present, only the iPhone mobile phone supports the MIDI protocol price cheap. A chip is less than 5 yuan. It uses data transmission. The loss is relatively small. Mode
. Introduction to BLE MIDI chip
2.1, chip introduction
KT2025 chip is a Bluetooth and U disk, TF card playback playback The 4 -in -one single chip, the highlight of the chip supports the playback of non -destructive music, and the simple and clear serial control function, support BLE transparent transmission, BLE MIDI, and SPP transparency function. It greatly reduces the development difficulty of embedding Bluetooth in other products.
2.2 chip parameters
Name parameters
n mp3 file format 1. Support all bit rate 11172-3 and ISO13813-3 layer3 audio decoding r r r r r r r r r r r r
2. Supporting rate support (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
3. Support Normal, Jazz, Classic, POP , ROCK and other sound effects
4. Support 24 -bit DAC
USB interface 2.0 standard
UART interface standard serial port, TTL level, Potter rate, Potter rate It can be set, connecting PC requires level conversion [for example: CH340G-USB to TTL]
input voltage 3.3V-5V [7805 post-class string of a diode is best]
The rated current 20mA [Static]
low -power current u003C200UA
chip DAC driving main chip DAC can only drive headphones
working temperature work temperature [-40 degrees]-[80 degrees]
5% ~ 95%
chip model KT2025 ssop24
n 2.3 chip characteristics r
1. The chip uses SSOP24 narrow body packaging
2. The chip peripheral component is small, only 6 capacitors, 5 105,1 2P7, plus a 24M crystal tone OK
3. The chip integration is high, powerful, and supports the traditional Bluetooth MP3 function. The built -in FM radio function
4. Bluetooth audio chip solution
n n n n n n n R n 5. Bluetooth number transmission solution — BLE
6. Bluetooth number transmission solution, dual-mode BLE and SPP
7, Bluetooth audio dual-mode data
8. Support Bluetooth BLE MIDI
9. Support the general AT serial instruction
2.4 Standard schematic diagram Professional term description
function remarks
Profeng function refers to the functions that all modes will have, such as the operation of sound, mute, switching mode, reset, etc. R N Music, MUSIC, and device refer to the function of inserting TF, inserting a U disk playback function
Bluetooth mode. Our Bluetooth here supports audio, but also supports BLE and SPP. R n BLE is Bluetooth communication A standard protocol. Bluetooth audio is independent
SPP. This is also a link for the Bluetooth communication protocol. That is, what the mobile phone is sent to Bluetooth, the Bluetooth is sent out through the serial port. When playing music, Bluetooth resources are not released, and Bluetooth data communication can still be performed
[if!] 4. [Endif] chip application scenario
1, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth, Bluetooth Audio products such as: Bluetooth speakers, Bluetooth headsets, car Bluetooth, etc.
, Bluetooth digital products such as: smart door lock, car OBD detection, smart car, printer, medical equipment data collection BLE MID
3. Bluetooth digital transmission audio products such as: Bluetooth music lamp, Bluetooth broadcast
Note: If you require ultra -low power consumption, this solution is not suitable
. Summary
The more you go, the more Bluetooth uses it on musical instruments. It will also have an advantage in this field.