Hello everybody,
I'm in the process of designing a headphone amp that could be also configured as a simple monitor controller. It will consist of a relay attenuator, optional buffering, optional input/output selector and all that will be controlled by msp430 series processor. I am currently writting firmware for the uC, in the meantime please comment on the analog section (attached schematic).
I was thinking about making a basic pcb with attenuator, buffer/hpa and uC controlled by encoder with a pushbutton and then add extra features like input/output selector or display on separate boards(so that the most basic configuration is cheap and easy to make). Any thoughts? What features besides volume control + mute/dim with a pushbutton do you suggest? Should it be fully balanced or have bal->se->attenuator->bal configuration to make attenuator two times smaller?
I'm in the process of designing a headphone amp that could be also configured as a simple monitor controller. It will consist of a relay attenuator, optional buffering, optional input/output selector and all that will be controlled by msp430 series processor. I am currently writting firmware for the uC, in the meantime please comment on the analog section (attached schematic).
I was thinking about making a basic pcb with attenuator, buffer/hpa and uC controlled by encoder with a pushbutton and then add extra features like input/output selector or display on separate boards(so that the most basic configuration is cheap and easy to make). Any thoughts? What features besides volume control + mute/dim with a pushbutton do you suggest? Should it be fully balanced or have bal->se->attenuator->bal configuration to make attenuator two times smaller?