# Reverb tail cut off when applying DSP to a channel, but not when applying to channel group

**URL:** <https://qa.fmod.com/t/reverb-tail-cut-off-when-applying-dsp-to-a-channel-but-not-when-applying-to-channel-group/12334>\
**Category:** FMOD Engine\
**Created:** [February 26, 2016, 2:53pm UTC](https://qa.fmod.com/t/reverb-tail-cut-off-when-applying-dsp-to-a-channel-but-not-when-applying-to-channel-group/12334 "2016-02-26T14:53:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sviudes](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@sviudes](https://qa.fmod.com/u/sviudes)\
**Post date:** [February 26, 2016, 2:53pm UTC](https://qa.fmod.com/t/reverb-tail-cut-off-when-applying-dsp-to-a-channel-but-not-when-applying-to-channel-group/12334/1 "2016-02-26T14:53:18Z")

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I’m using low level API to apply some DSP. When I apply reverb DSP to a channel group, I can hear reverb tail when sound finishes playing. But if I apply DSP to a channel (instead to a channel group), then reverb tail is being cut off.

Why? How can I avoid the tail cut off when apply DSP to a channel?

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**Author:** ![brett](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/brett/32/261_2.png) [@brett](https://qa.fmod.com/u/brett)\
**Post date:** [February 28, 2016, 2:22am UTC](https://qa.fmod.com/t/reverb-tail-cut-off-when-applying-dsp-to-a-channel-but-not-when-applying-to-channel-group/12334/2 "2016-02-28T02:22:30Z")

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That is correct, a channel stops, a ChannelGroup doesnt.

You can put the channel in a ChannelGroup to have reverb continue as you discovered, or you can delay the end of the Channel stop with Channel::setDelay if you want to do it that way.

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**Author:** ![sviudes](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@sviudes](https://qa.fmod.com/u/sviudes)\
**Post date:** [February 28, 2016, 9:23am UTC](https://qa.fmod.com/t/reverb-tail-cut-off-when-applying-dsp-to-a-channel-but-not-when-applying-to-channel-group/12334/3 "2016-02-28T09:23:07Z")

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> [@](#):
>
> That is correct, a channel stops, a ChannelGroup doesnt.
> 
> You can put the channel in a ChannelGroup to have reverb continue as you discovered, or you can delay the end of the Channel stop with Channel::setDelay if you want to do it that way.

Thanks. I’ll try to put channel in channel group