Teensy 4.0 + PCM5120-Q1 768kHz stereo recoring possible?

cuishuang456

New member
Hello everyone,

I'm working on an audio project using the Teensy 4.0 and could use some help getting started.
I'm planning to use a stereo two-channel 768 kHz ADC (PCM5120-Q1) and need confirmation that the Teensy 4.0 can handle 768 kHz sampling at 32 bits per frame (16 bits per channel) with a BCLK clock rate of 24.576 MHz. Does the current audio library support this, and how do I configure it? Are there specific changes I need to make in the code?

I'm relatively new to audio projects, so any guidance is appreciated. Thanks in advance!
 
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And? Did you follow the suggestion in the compiler error message? (must set Tools > USB Type to Audio)
 
768 kHz sampling at 32 bits per frame (16 bits per channel) with a BCLK clock rate of 24.576 MHz. Does the current audio library support this

No, the audio library uses 44.1 kHz sample rate.

BCLK at 24.576 MHz should be theoretically possible. Some software editing required.... I believe NXP's max spec is 25 MHz.

As far as I know, the fastest BCLK we've actually used is 11.3 MHz for TDM.
 
No, the audio library uses 44.1 kHz sample rate.

BCLK at 24.576 MHz should be theoretically possible. Some software editing required.... I believe NXP's max spec is 25 MHz.

As far as I know, the fastest BCLK we've actually used is 11.3 MHz for TDM.
Thanks Paul, I was hoping this could work. I will look into this a bit more.
 
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