# Audio stimuli / sounds cannot be heard on some trials, gets worse as experiment progresses

**URL:** <https://discourse.psychopy.org/t/audio-stimuli-sounds-cannot-be-heard-on-some-trials-gets-worse-as-experiment-progresses/29464>\
**Category:** Online experiments\
**Tags:** sound, pavlovia\
**Created:** [June 5, 2022, 2:04pm UTC](https://discourse.psychopy.org/t/audio-stimuli-sounds-cannot-be-heard-on-some-trials-gets-worse-as-experiment-progresses/29464 "2022-06-05T14:04:56Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Hera](https://avatars.discourse-cdn.com/v4/letter/h/9de053/32.png) [@Hera](https://discourse.psychopy.org/u/Hera)\
**Post date:** [June 5, 2022, 8:30pm UTC](https://discourse.psychopy.org/t/audio-stimuli-sounds-cannot-be-heard-on-some-trials-gets-worse-as-experiment-progresses/29464/3 "2022-06-05T20:30:00Z")

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Hello Yiannis!

Thanks for the suggestion!🙂 These were the sizes for each audio file (first number is the .wav size and the parenthesis number is the mp3 size):  
170.6KB (6KB), 189KB(7KB), 207.4KB(7KB) and 248.9KB(9KB).

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