About RRumi

RRumi · 2019-09-30

I have audio pass-through working project for STM32F746/769 DISCO module, where block of 4 samples (2 left and 2 right channel ones) from input are passed to output chanell DMA buffer.My delay line implementation is as follows:#define BUFF_SIZE 4 #de...

RRumi · 2019-10-07

Problem solved. Initialization in wm889.c file has an error. /* Disable mute on IN1L_TO_MIXINL and +30dB on IN1L PGA output */ counter += CODEC_IO_Write(DeviceAddr, 0x29, 0x0035); /* Disable mute on IN1R_TO_MIXINL, Gain = +30dB */...

RRumi · 2019-10-02

Yes, except first memcpy from buff_in.Regards,Roman

RRumi · 2019-10-02

> I don't get the point why you are using a small buffer and a large one. The small buffer forces HAL_SAI_RxCpltCallback to be called very frequently. And, you copy the samples to buff_out asynchronously, i.e. independent of any HAL_SAI_TxCpltCallbac...

RRumi · 2019-10-02

WM8994 has over tousand control registers, so ... anyway, i'll check.Yes, I tried play simple waveforms, tone burst and they are clean - no echo.Repeated signal has 1/3 amplitude of oryginal signal in case of pass-through.Thanks for response,Roman

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STM32F746-DISCO audio delay line implementation problem.

Re: STM32F746-DISCO audio delay line implementation problem.

Re: STM32F746-DISCO audio delay line implementation problem.

Re: STM32F746-DISCO audio delay line implementation problem.

Re: STM32F746-DISCO audio delay line implementation problem.