https://github.com/sdima1357/stm32f401cdu6_nrf_audio

low latency wireless lossless audio
https://github.com/sdima1357/stm32f401cdu6_nrf_audio

audio-player audio-streaming i2s-audio nrf24l01 pcm5102 stm32 wireless

Last synced: 7 days ago
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low latency wireless lossless audio

• Host: GitHub
• URL: https://github.com/sdima1357/stm32f401cdu6_nrf_audio
• Owner: sdima1357
• License: agpl-3.0
• Created: 2024-06-09T18:12:18.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2024-06-12T12:08:38.000Z (5 months ago)
• Last Synced: 2024-06-13T01:42:53.959Z (5 months ago)
• Topics: audio-player, audio-streaming, i2s-audio, nrf24l01, pcm5102, stm32, wireless
• Language: C
• Homepage:
• Size: 2.54 MB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# stm32f401cdu6_nrf_audio

Low latency wireless lossless audio, 2 chanels 44100 16bit , pure passive receiver with error correction. PC(or phone or tablet)->USB audio -> stm32->nrf24L01 ----> nrf24L01->stm32->i2s->pcm5102

Planned latency is about ~10 mS (it will be checked)

Measured - 13 milliseconds!

![image1](https://github.com/sdima1357/stm32f401cdu6_nrf_audio/blob/main/images/IMG_20240609_221716_2c.jpg?raw=true)

How to measure latency:

install  virtual output device 

https://askubuntu.com/questions/78174/play-sound-through-two-or-more-outputs-devices

>sudo apt install paprefs

>...

enable simultaneous output to all attached sound cards and devices

connect scope to onboard card (yellow chanel) and stm32 wireless (blue chanel)

play 5 Hz rectangular pulse train