Play records through microphone line

[Talibowy]

Hey guys i need your help. I'm looking for a programme that allow to play records (that i make) through microphone line.

I work as a pollster at home, on my private computer (with Windows 10). And as it happens on this job, people quite rarely agree for an interview so most of the time i repeat the same introduction and this kills my throat. So I would like to record some of the lines I say and play it. But I can't use any binds, because the programme that I use to do interviews doesn't allow me to basically do anything. So I need a programme that could play the records through microphone line, so my programme would think that I am saying it and allow it to play to my interviews.

I have tried to use a programme called Resanance, but I had one big problem with it. I could only play records or only speak with my interviews. I can't do both at the same time, and I don't know why. Maybe it's my fault, but I think I've tried every possible combinations with my settings and it didn't work. So maybe you guys could help me find the right programme? It can be paid.

If you need more details please tell me.

[Geek-9pm]

Yes, more details might help.
My first knee-jerk is that you need voice lessons. Anybody who needs to use their voice in business dealing needs voice  training.I used to be a professional and could talk for hours on the radio without getting horse very often.

But you might want to make a hardware solution. You could make a DIY mixer to  merge a recording with the mic input at the physical hardware. The recordings would have to be on a separate device. Like an old cassette recorder.
Something like this:
https://www.instructables.com/id/Making-an-Audio-Mixer/

It is a super simple passive analog mixer. 

[DaveLembke]

Records played and input through Line-In will be best, then microphone in microphone jack.

Software that I have used for blending audio sources with video is OBS Studio which is free: https://obsproject.com/

Then for blending audio only audacity works. https://sourceforge.net/projects/audacity/

If your performing a live stream than the website that your doing your stream from will work with your computer and its various inputs to blend Line-In from Record Player and Microphone. However you may need to adjust the advanced properties in the audio controls to do the fade in and out controls vs cutting in which mic unless cutting in with mic is what you want to do.

I have never done any live streaming, all my stuff was stuff that was recorded and edited and then submitted on youtube for people to see/hear. But that was years ago because I moved on from that stuff.

[Talibowy]

@Geek i don't need voice lessons I was working in this company for a little bit so i know how-to. I just have little bit health problems with my throat and i don't want to resign from this job. And about your hardware solution. I would like to use some kind of software, becouse i don't know much about hardware as it is. So i don't want to spend money on something that i may not know how to use.

@Dave i don't do it by live streams. I use voice program called "Cadas Softphone" and the problem with it is that I can't change anything in this program except recording device (so i can only choose which mic i use). That's why i need my records to go through microphone path.

e: I use audacity to record my lines in to mp3 file but i need to play it through softphone and i don't know how.

[DaveLembke]

I would go to a local music store the type that sells instruments and mixing equipment and check to see what they have for a low cost mixer. This way both can be on the Mic Jack to PC. They come with knobs and/or slider controls for blending 2 audio sources into a single input.

[Talibowy]

Any other ideas, guys?

[SuperDave]

I'm curious as to how you are conducting these interviews. Are they on-line or some other method?