Manycam is a virtual webcam, you can provide it with videos, images, audio and has many other features like flipping or mirroring footage, adding effects and so on. I have not used it recently but it looks like they have gone for a more payed method now, with a free version. Older versions, if you can find them, will allow you to remove the watermark and use ...
Software like Virtual Audio Cable (mirror) creates pair of virtual sound devices connected together. Configure audio player to use "output" device and voice recognition software to use "input" device.
From my tests (few different "virtual audio cables") this kind of software may have some reliability problems. Why not use just physical sound ...
A little out of the box but one of the quickest, cheapest & lowest computational load mechanisms to do this would be buy a cheap USB webcam, (you can get them for next to nothing), and place a little insulating tape over the lens and microphone.
Not quite gratis
Real quick and easy
Works on any platform that supports USB Web Cam.
Full disclosure: I’m the developer behind Noise Blocker, an app I built to help tackle unwanted noises on VoIP calls.
Noise Blocker is a customizable noise gate that allows you to record a sample of any kind of noise (i.e background noise, typing on your keyboard, mouse clicks, etc) and block it accordingly.
If you’d like to see it in action, here is a ~...
A microphone is an input device. Sound that is generated external to the microphone is then transmitted to the storage/recording device.
The electronics involved in this device make it a one-way device. You cannot pass sound into your microphone to be broadcast.
It's possible that you could be clearer in your requirements.
There is a program called Total ...
After testing numerous apps I ended up using an app called JusTalk. It doesn't tick the open source box, but it does work as intended. The ring tone comes out of the phone speaker and the conversation happens on whatever is connected to the headset connector.
Power Mixer is an advanced Windows audio mixer, a complete replacement
for the standard Windows volume control. This application lets you
easily change the sound volume just by rotating the mouse wheel or by
using keyboard hot keys. It includes an audio mixer with advanced
volume controls support, a scheduler, an on-screen display, command
You may consider using AlterCam program.
It works with Windows 10.
It installs virtual webcam you can use anywhere. Looks like it can't use static image as the video source, but there are a lot of workarounds - you can select your real webcam as the source and turn brightness setting to zero, you can select unexisting ip-camera as the source and get black ...