# Capture listener's audio output and then playback elsewhere in the 3D scene

**URL:** <https://qa.fmod.com/t/capture-listeners-audio-output-and-then-playback-elsewhere-in-the-3d-scene/13413>\
**Category:** FMOD Engine\
**Created:** [September 7, 2017, 6:52pm UTC](https://qa.fmod.com/t/capture-listeners-audio-output-and-then-playback-elsewhere-in-the-3d-scene/13413 "2017-09-07T18:52:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![virtualizdufaure](https://avatars.discourse-cdn.com/v4/letter/v/50afbb/32.png) [@virtualizdufaure](https://qa.fmod.com/u/virtualizdufaure)\
**Post date:** [September 7, 2017, 6:52pm UTC](https://qa.fmod.com/t/capture-listeners-audio-output-and-then-playback-elsewhere-in-the-3d-scene/13413/1 "2017-09-07T18:52:24Z")

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Hi !

I am a Linux software developer working for a company specialized in 3D real-time simulators.

I come from OpenAL Soft API with basic knowledge in audio programming.  
I’m now looking for a new feature OpenAL does not seem to provide :

- While playing sounds inside a 3D audio scene (with multiple 3D-positionned sound playbacks at the same time), I’d like to record the da ta “eared” by a listener object (with good 3D positioning) instead of directly transferring it to the OS output audio device (speaker). Is this possible with your API ?

- I have to buffer the resulting audio data from the listener in the same audio scene and replay it as a mono stream elsewhere in the 3D scene with a small latency, potentially generating an audio recursion (if the sound playback is then eared by the current recorded listener).

It’s a kind of virtual microphone —\> speaker link present inside the 3D scene, with  
control to final output data… Or a kind of “audio render-to-texture” system if compared to the camera eye and 3D graphics rendering…

Do you have such a feature ? Or something related inside FMOD EX library ?

Thanks,

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**Author:** ![richard\_simms](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/richard_simms/32/261_2.png) [@richard\_simms](https://qa.fmod.com/u/richard_simms)\
**Post date:** [September 8, 2017, 12:41am UTC](https://qa.fmod.com/t/capture-listeners-audio-output-and-then-playback-elsewhere-in-the-3d-scene/13413/2 "2017-09-08T00:41:45Z")

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Hi Deboute,

You can get this setup by using the Transceiver effect.

I’m not sure if you are using FMOD Studio or just the low-level API, but you should be able to set the effect (or DSP) to send from the bus/group channel where the sound recording is coming from, and then place the transceiver receiving this sound onto a 3D event or 3D sound. This event/sound must also have its own spatializer to get correct 3D positioning.

Thanks,  
Richard