VB-CABLE (Virtual audio cable) is free software that has virtual emulation interface and uses the WDM driver architecture for audio signal streaming under Windows. The virtual audio card driver is used to transmit audio signal streams from one application to recording application without losing quality. The biggest advantage of this virtual interface saves the hardware cost, and the transmitted signals are all digital, so there is no problem of signal pollution or attenuation. It can be considered as good virtual audio cable alternative to VAC software that is paid and developed by Eugene Muzychenko.
So, if you want to route audio from one application such as Audio/Video player or Youtube to some other recording application without any quality lose then use the tiny VB-Cable software. It works on all Windows platform such as Windows XP/2003/Vista/Windows 7/8/8.1/Windows 10.
How to record PC audio without Mic using Virtual cable?
Step 1: Download VB-CABLE (Virtual audio cable)
As I said VB-CABLE is free, so we can use it as long as without any trial or license expire problem. The developers apart from this application also offer few other software related to audio such as HIFI-CABLE driver. This one works the same as Vb-Cable but needs to be configured with the same sample rate on its Input and its output. HI-FI Cable is bit perfect and supports up to 24 bits 384 kHz audio stream. It is one of the best Virtual audio cable apps, here is a link to the official website.
Step 2: Install Virtual audio cable
The software will download in the form of a ZIP file in the size of 1.09MB. Once it on your right click and extract the file.
Step 3: Go to VBCABLE_Driver_Packxx folder
After extracting, open the folder that has the VBcable files and if your system is 32-bit right click on VBCABLE_setup.exe and Run as administrator. And in case the system is of 64-bit right click on the VBCABLE_Setup_64.exe to install under administrative rights.
Restart system after the installation process.
Step 4: Open Sound Control Panel
Go to Windows 10/8/7 search box and type sound. Alternatively, you can open the Windows Sound settings from the Control Panel-> Hardware and Sound ->Sound.
Under Recording Tab, right click on the CABLE Output and enable it, in case it not.
Step 5: Record audio using Virtual audio cable.
Now, for example, we want to record some audio online, like from YouTube. So, what we do, first run the sound recording application. By default, Windows has that, open it and play the song on YouTube. The VB-Cable will automatically route the sound or audio for YouTube to Recording application of Windows. In this way, without losing the quality we can record any voice. It is not only limited to Recording app, but any app that supports audio input will capture the audio played on the Windows system routed by Virtual audio cable.