Audio device design and assembly -- 3

I would need someone to design the electronics for an audio product, and to create a working proto of the PCB board. It is a type of a mixer, and in order to successfully complete this project, you would need to have a good understanding of electrical engineering and also be experienced in designing such audio devices. This project is not for beginners. The budget for the project is under 1000 €, so no need to bid over that.

I'm not familiar with electronics, so you need to be able to figure out the suitable solutions that fit the project.

I need a definite deadline for the project, once you know the scope and what is required. This is a must.

The project deliverables:
- circuit board design
- working prototype of the PCB board
- delivered to Finland