Category:BT Audio

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IC solutions

Header text Some models Bluetooth A2DP, AVRCP, HFP, etc Output Analog / I2S / SPDIF TWS APTx Features
OVC3860 OmniVision V2.0+EDR A2DP V1.2, AVRCP V1.4 ?
CSR8635 qualcomm CSR V4.1 A2DP v1.2, AVRCP v1.4, HFP v1.6, HSP v1.2, DI v1.3 Analog X Stero
CSR8645 qualcomm CSR A2DP,AVRCP,HFP,AAC X X APTx Stero,
CSR8670 qualcomm CSR V5.0 A2DP V1.31, AVRCP V1.6, HFP 1.7 HSP 1.2, etc Analog / I2S / SPDIF TWS APTx, APTx-LL, APTx-HD
CSR8675 qualcomm CSR V5.0 A2DP v1.3.1, AVRCP v1.6, HFP v1.7, HSP v1.2, MAP v1.1, PBAP v1.1.1, DID v1.1 Analog / I2S / SPDIF TWS APTx
BlueCore5 qualcomm CSR V2.1+EDR A2DP V1.2, AVRCPV1.4
CSRA64215 qualcomm CSR V4.2 A2DP V1.3, AVRCP V1.6, HFP v1.6, HSP v1.2, DI v1.3 I2S TWS APTx, APTx-LL
CSRA63225 qualcomm CSR
BK8000L Beken V2.1 + EDR, +SPP A2DP v1.2, AVRCP v1.0 Aux-in, key control
BK8002 Beken V2.1 + EDR, +SPP Aux-in, TF/SD, sequential MP3, FM(not good), key control
BK8008 Beken TWS
BK3254 Beken V4.1
BK3260 Beken V4.2
BK3266 Beken V4.2 Aux-in, TF/SD, USB Disk, sequential MP3, change name, key control
66xx Buildwin (appotech Jianrong)
RDA5856 RDA
- JL
IS1861S ISS
BM2020 Sunrise

Concept

Header text English Header text
A2DP Advanced Audio Distribution Profile Example
AVRCP Audio/Video Remote Control Profile Example
HFP hand-free profile 免提通话功能
TWS Qualcomm TrueWireless™ Stereo (TWS), which allows two devices to be configured as a stereo pair 无线对笔功能,即一个手机可以同时连接2台蓝牙音箱,区分左右声道
AAC codec
I2S 数字音频输出
APTx, APTX-LL, APTX-HD codec, qualcomm only https://en.wikipedia.org/wiki/AptX 提升音质,减小延时,需要设备端(电脑、手机、平板〕也支持
EDR Enhanced Data Rate

Current noise

Power

  • Use soldering instead wires on power, or as short as possible, wires has large resistance.
  • Better use linear regulator, if use DC-DC must avoid ripples, add LC circuits filter. See left side.(L - 10UH, D - 4148, C - 10~100UF)
Bt-audio 01.png
  • For normal AC-DC adapter, inductor can skipped.
  • voltage must be 5V, not over 5V, 5.1-5.4V is not good
  • Must lead out two wires to connect to power ground and audio ground seperatedly.

Other issues

  • avoid interference signal, avoid large-size metals, avoid router, high power unit, etc
  • avoid fully closed metal case
  • Check different ground connection point to see the best place
  • do not touch it
  • If still noise, try to power supply amplifier and bluetooth module board seperately

Weak bluetooth signal

  • Powr supply interference, ripples
  • Power supply incorrect voltage
  • delete former matched modules, and re-pair

Subcategories

This category has only the following subcategory.

C

Pages in category "BT Audio"

The following 8 pages are in this category, out of 8 total.