I would like to have a solution to equip an average Windows 7 / 10 laptop with line-in input (stereo, 250-500 mV). All the USB sticks I found at Amazon have only the microphone input (2-5 mV).
A microphone input has another voltage level, is a mono input, the signal goes through preamplifier with the curve suitable for microphones.
I need a normal stereo line input with voltage level ten times higher than for microphone and without the preamplifier.
Formerly there were very cheap ($10...$25) ISA/PCI/PCIe/PCMCIA/ExpressCard card devices with line in and a good quality. Nowadays laptops do not have any of these connectors inputs except USB. Even ExpressCard seems to be retired.
Do you know some solutions except buying a super huge professional external sound card of suitcase size for $250 ?