# No audio when using GoCoder (with WebRTC)

**URL:** <https://community.wowza.com/t/no-audio-when-using-gocoder-with-webrtc/50175>\
**Category:** Wowza Streaming Engine\
**Created:** [November 20, 2017, 2:54am UTC](https://community.wowza.com/t/no-audio-when-using-gocoder-with-webrtc/50175 "2017-11-20T02:54:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![john\_mcqueen](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@john\_mcqueen](https://community.wowza.com/u/john_mcqueen)\
**Post date:** [November 20, 2017, 2:54am UTC](https://community.wowza.com/t/no-audio-when-using-gocoder-with-webrtc/50175/1 "2017-11-20T02:54:20Z")

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When encoding with GoCoder my WebRTC stream has no audio. But RTMP playback does have audio. Audio works via WebRTC when encoding with OBS though. I have audio only transcoding setup to transcode AAC to Opus.

What could cause this?

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<div class="post-metadata">

**Author:** ![john\_mcqueen](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@john\_mcqueen](https://community.wowza.com/u/john_mcqueen)\
**Post date:** [November 20, 2017, 2:10pm UTC](https://community.wowza.com/t/no-audio-when-using-gocoder-with-webrtc/50175/2 "2017-11-20T14:10:49Z")

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```auto
JNI:AudioEncoderOpus.initialize[_defaultVHost_:webrtc/_definst_/demo:aac]: Sample rate is not supported [8KHz, 12KHz, 16KHz, 24KHz, 48KHz]: 44100

```

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<div class="post-metadata">

**Author:** ![john\_mcqueen](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@john\_mcqueen](https://community.wowza.com/u/john_mcqueen)\
**Post date:** [November 20, 2017, 2:55pm UTC](https://community.wowza.com/t/no-audio-when-using-gocoder-with-webrtc/50175/3 "2017-11-20T14:55:32Z")

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It seems GoCoder is using an audio sample rate of 44.1khz and I don’t see a way to change that in the app.