# Present two delayed sound to the same audio-slave

**URL:** <https://psychtoolbox.discourse.group/t/present-two-delayed-sound-to-the-same-audio-slave/40>\
**Category:** Uncategorized\
**Created:** [January 31, 2019, 12:15pm UTC](https://psychtoolbox.discourse.group/t/present-two-delayed-sound-to-the-same-audio-slave/40 "2019-01-31T12:15:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\
**Post date:** [January 31, 2019, 12:15pm UTC](https://psychtoolbox.discourse.group/t/present-two-delayed-sound-to-the-same-audio-slave/40/1 "2019-01-31T12:15:12Z")

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Hi

  

I'm looking for advice on how to present two speech signals to the same audio slave-handle, but delaying the onset of one of them. I want one speaker to start and after between 3-4 seconds (varied randomly) the other should begin in the same channel as the other.&nbsp;

  

I could do it 'manually' by adding the two signals with one being time-delayed, however I really what the trigger the onset-time of the seconds, as well as the first, speech-stream. Is there any way of adding a second sound to an already-playing buffer?

  

  

Does anyone have some experience with this?

  

Eline