# Any resource to look at for recording playback audio?

**URL:** <https://qa.fmod.com/t/any-resource-to-look-at-for-recording-playback-audio/16039>\
**Category:** FMOD Engine\
**Created:** [August 4, 2020, 9:10am UTC](https://qa.fmod.com/t/any-resource-to-look-at-for-recording-playback-audio/16039 "2020-08-04T09:10:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jiyongman](https://avatars.discourse-cdn.com/v4/letter/j/ebca7d/32.png) [@jiyongman](https://qa.fmod.com/u/jiyongman)\
**Post date:** [August 4, 2020, 9:10am UTC](https://qa.fmod.com/t/any-resource-to-look-at-for-recording-playback-audio/16039/1 "2020-08-04T09:10:06Z")

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I saw an example of recording audio from a mic, but I want to capture the audio output from a specific channel group or the master channel group and then save it to a file.

Could you tell me where to start?  
At least, could you tell me any related function names?

One more question. Is it possible to capture the output audio silently as other professional audio apps’ export features do?

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**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\
**Post date:** [August 5, 2020, 1:18am UTC](https://qa.fmod.com/t/any-resource-to-look-at-for-recording-playback-audio/16039/2 "2020-08-05T01:18:29Z")

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To capture the signal at a specific point in the DSP graph you’ll need to create a custom DSP. Take a look at the dsp\_custom example we ship, then attach it to the desired ChannelGroup with addDSP.

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**Author:** ![jiyongman](https://avatars.discourse-cdn.com/v4/letter/j/ebca7d/32.png) [@jiyongman](https://qa.fmod.com/u/jiyongman)\
**Post date:** [August 11, 2020, 3:53pm UTC](https://qa.fmod.com/t/any-resource-to-look-at-for-recording-playback-audio/16039/3 "2020-08-11T15:53:54Z")

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Thank you!