Super I2S Project

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Hey guys, I know you still interest in those things and I know you can help me with my new project. I want to make a new sound system for my working laboratory which allow sound experience: I want to use a processor (IMX6L) and some DAC/amplifier (TAS5760M) embedded in each speaker box to drive them. The ULTIMATE purpose is to manage the EQ and volume of each speaker via I2S.

Here on the next picture is my electronic arch, I got in hands the I2C configuration with a beautiful Nucleo F303 code. And I know how to send data to the DAC/Amplifier with an audio precision tool. I have to manage my time to produce double sided PCB and make those 5 little boards (currently using a bad looking prototype). Lets say this part is quite OK.

Here is my asking:
I 'm not very good devellopper myself but I really want to do this project, what piece of software (linux style of course) do you know (as ALSA for example) that could allow me to:
1) route three configurable I2S output on IMX6?
2) manage EQ and volume on them?