# Microphone frequency

**URL:** <https://forum.makecode.com/t/microphone-frequency/28129>\
**Category:** micro:bit\
**Created:** [April 7, 2024, 10:58pm UTC](https://forum.makecode.com/t/microphone-frequency/28129 "2024-04-07T22:58:05Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![pythom](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@pythom](https://forum.makecode.com/u/pythom)\
**Post date:** [April 7, 2024, 10:58pm UTC](https://forum.makecode.com/t/microphone-frequency/28129/1 "2024-04-07T22:58:05Z")

</div>

Hello, I want to make extension that can recognize some sounds, but I don’t know how to get microphone frequency. Anyone know how to do it? Thanks in advance 😃

---

<div class="post-metadata">

**Author:** ![robotosaurus](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/robotosaurus/32/19294_2.png) [@robotosaurus](https://forum.makecode.com/u/robotosaurus)\
**Post date:** [April 8, 2024, 3:47am UTC](https://forum.makecode.com/t/microphone-frequency/28129/2 "2024-04-08T03:47:45Z")

</div>

Found this. [V2 microphone frequency detection - #4 by urassari](https://forum.makecode.com/t/v2-microphone-frequency-detection/17143/4)

---

<div class="post-metadata">

**Author:** ![pythom](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@pythom](https://forum.makecode.com/u/pythom)\
**Post date:** [April 9, 2024, 2:01pm UTC](https://forum.makecode.com/t/microphone-frequency/28129/3 "2024-04-09T14:01:39Z")

</div>

Thanks, but the project [https://makecode.microbit.org/21869-69247-64798-08788](https://makecode.microbit.org/21869-69247-64798-08788) doesn’t work (look in the custom.ts file, most functions are commented)

---

<div class="post-metadata">

**Author:** ![robotosaurus](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/robotosaurus/32/19294_2.png) [@robotosaurus](https://forum.makecode.com/u/robotosaurus)\
**Post date:** [April 9, 2024, 6:11pm UTC](https://forum.makecode.com/t/microphone-frequency/28129/4 "2024-04-09T18:11:33Z")

</div>

The actual code is one of the cpp/c++ files.

---

<div class="post-metadata">

**Author:** ![pythom](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@pythom](https://forum.makecode.com/u/pythom)\
**Post date:** [April 10, 2024, 4:20pm UTC](https://forum.makecode.com/t/microphone-frequency/28129/5 "2024-04-10T16:20:31Z")

</div>

But also most of the code of cpp files is commented…