Automatic input detection (no remote or so is needed).
Up to 7 inputs (7 optical or 4 optical and 3 coax with RCA or BNC plugs).
So I decided to create an optical audio switch which also includes a high quality audio DAC and is controlled by a small microcontroller.
Because of my optical audio output/input module for the Raspberry Pi people were asking if it is possible to combine a optical input module and a high quality audio DAC shield - in theory this is possible, but you don't really need a Pi for this - you can connect the audio processor to the DAC and only need something which makes some basic simple controls.
So I searched the internet and could only find switches with a remote and no automatic input detection (the only one I found was very expensive and only had 2 inputs).
I wanted to connect TV, Raspberry Pi and Playstation to my 5.1 system via optical cable, but the 5.1 system only has 1 optical input - using HDMI doesn't work well, because the TV forwards 5.1 streams always as 2.0 stream, so you don't have a good sound anymore.
Optional high quality Audio DAC (24Bit Sabre DAC - like some other DAC shields for the Raspberry Pi).
Optical output will switch off if there is no signal on any input (so a receiver can switch on/off automatically based on the signal here).
Optical and/or Coax (RCA or BNC) outputs (coax via RCA/BNC plugs with output transformer).
4 optical inputs and 3 coax inputs (RCA or BNC plugs) or 7 optical inputs.
Optical/SPDIF Audio Switch with automatic input detection (it will automatically switch to the input where a signal is coming - if there is a signal on 2 or more inputs the inputs are prioritized - it will always prefer input 1 before input 2 and so on).
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