Apps similar to Virtual Audio Streaming include Carla, which is free and open source. Other options are VB-Audio Virtual Cable, Synchronous Audio Router, VAcard and Virtual audio capture grabber device. In total there are five Audio Recorders like Virtual Audio Streaming for Windows, Mac and Linux.
Carla is an audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.
VB-Audio CABLE is a Windows Audio Driver working as a Virtual Audio Cable. After installing the VB-CABLE driver, a new playback device appears in the audio device list and can be set as default device. VB-CABLE can be set as the default device, just like any regular audio device.
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Synchronous Audio Router is a software-based audio routing driver for Windows. You can create any number of Windows audio endpoints, either playback or recording, and route them using any digital audio workstation software which supports ASIO, all with low latency.
[NOTE: You can download the application from http://www2012.barix.com/downloads/Software_tools/221 ]
virtual-audio-capture-grabber-device is an audio capture device allowing you to capture all the "wave out sound" that is playing on your speakers (i.e. record what you hear) for Windows 7/Vista.
