USB Stereo Recorder With Line Input

I have been looking for a portable device to record stereo sound from my old HiFi-equipment to USB. They are extremely rare to find. Therefore I decided to modify my ezcap 230 which is only able to record sound from my old cassettes. If you can handle a soldering iron, the modification is quite simple and the result is good. This device works with two AA batteries. I added a switch for the batteries. Later on I will connect an externa power supply.