Need Instrument/line level signal in a PC to be accepted as a microphone input

My problem lies in the internal connections the OS provides.

I want to use a specific program that is looking for a microphone input.

I use an external preamp to boost the microphone signal up to an instrument level, which allows me to use a switch to select between the 'mike' input and other higher level inputs before it gets routed into my audio interface to the PC.

The program I want to use doesn't see the input from my audio interface as a 'mike' input.

Any program that works with 'mike' inputs must be relying on the motherboard or soundcard to have already amplified the 'mike' signal to a level it can work with. I don't believe the programs are working with the low level microphone output signal.

I want to be clear here - I am not suggesting putting the amplified microphone signal into a "microphone" input on the PC. In fact I have turned off the internal motherboard sound system, because I use a high quality audio interface to bring audio into the PC on a USB line.

So it is a question of internal routing. How can I get a boosted 'mike' input found on a 'instrument' level input line to be accepted as speech by a program?

I asked this of Windows specialist and they suggested I ask in an audio forum.

 

how about Virtual Audio Cable?

Virtual Audio Cable - Wikipedia

n.b. I don't use much Windows, and haven't used this. it's what came up in a search for Windows equivalent of Soundflower for Mac.

 

What you'll need to do for client software that doesn't allow you to select the sound interface and the input, is to set the Windows default "recording" input in control panel -> sound to the mic interface.

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