Playthrough is described as 'Small windows application which allows you to route an incoming audiostream to the output of another soundcard. Usually you can only enable playback on the same soundcard' and is an app. There are 2 alternatives to Playthrough for Windows. The best Playthrough alternative is AmpSplit. It's not free, so if you're looking for a free alternative, you could try Audio repeater.
Instantly repeat your Windows PC audio to multiple outputs like speakers, headphones, or bass shakers for immersive setups, gaming without telemetry, or multi-room listening—all with no drivers, simple installation, and a straightforward interface.
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Audio Repeater allows you to transfer audio samples from one device to another with DSP processing support. For an instance, let's say you have Bluetooth headset & you want to listen audio output of your PC through headset.
