How to control DSP volume via I2C from Volumio/Rpi?

Diy and Tweaks
1

I want to control the volume in my DSP over I2C interface from Volumio/Rpi4, is there a plugin for sending volume controls or some kind of config to get things going?
I guess it could also be over SPI, whichever gets the job done, but either way I can’t find any instructions on this.
(I’m using an ADAU1452 as a crossover + EQ for my system with SigmaStudio.)

2

maybe a plugin such as allo relay volume attenuator in miscellanea category is a good start to write your own

3

Thanks balbuze, will check it out.
Appart from that, is there some documentation on how to write I2C for Volumio?

4

You could simply use i2cset(8): set I2C registers - Linux man page or if you want to do everything directly from node, look at i2c-bus - npm

5

Will mark this as solution, obviously there is no ready-made solution but the documentation an examples are there.