Make a good measurement system with REW and Raspberry

Hi Antonio:

Just thought I would keep in touch. As you know, I am enthusiastic about your work and in particular what you come up with for the sound card. Hope you know how much we appreciate your work on the analyzer and its sound card.

Has the market gotten better for the chips you need or is it still a problem?

Thanks again,

Wes Brenner

Hello
the audio card is still undergoing circuit modification to improve some aspects related to the DAC low-pass filter and to improve the square waveform always output to the DAC.
I am a perfectionist and I am never happy with the result, the next version will have a more complex output buffer due to a 6th order low-pass filter.
Unfortunately I am still in the process of modifying the PCB which is proving difficult, I hope to finish it by the end of September 2024.
Afterwards I will have to have it made and then assemble and test it, I don't think it can be made by the end of 2024.

Greetings from Rome
Antonio Di Motta

Hi Antonio:

Want to make sure you know there is still interest in your project. As you know I am still interested in your ADC/DAC for the Raspberry Pi. Since nothing I have tested is satisfactory, I still hope that part of your project will become the standard for the Raspberry Pi.

Thanks again,

Wes Brenner

Hi Antonio:

Have you abandoned this project ?

Wes Brenner

Good evening,
No, the project hasn't been abandoned, but it's slowing down due to my many work commitments.
I'm continuing to monitor the development of the REW software and test it on the Raspberry Pi 5
and I can report that the latest version 5.40beta112, works properly when installing Java 11.
Unfortunately the latest version of Raspian OS with kernel 6.12 doesn't activate the SuperAudioBoard audio driver needed for my sound card, which is based on the CS472 chip.
The audio driver is configured correctly up to Raspian OS kernel version 6.6.
If it can help, I found this sound card that you can buy online with the same chip.

It seems well-built, although they haven't released any specific details about its performance.

Best regards
Antonio Di Motta