# Sample Rate Mismatch, server won't boot

**URL:** https://forum.toplap.org/t/sample-rate-mismatch-server-wont-boot/2048
**Category:** SuperCollider
**Created:** [9 June 2022 15:45 UTC](https://forum.toplap.org/t/sample-rate-mismatch-server-wont-boot/2048 "2022-06-09T15:45:48Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![taguniversalmachine](https://forum.toplap.org/user_avatar/forum.toplap.org/taguniversalmachine/32/1121_2.png) [@taguniversalmachine](https://forum.toplap.org/u/taguniversalmachine)
#### Post date: [9 June 2022 15:45 UTC](https://forum.toplap.org/t/sample-rate-mismatch-server-wont-boot/2048/1 "2022-06-09T15:45:49Z")

</div>

I am using Supercollider on a Macbook Pro, but it seems no matter what combination of devices I try, it complains of a sample rate mismatch. The docs say to change the sample rate in the MIDI setup, but the dialog doesn’t give me the option to change the sample rate.

 ![midi_setup](https://forum.toplap.org/uploads/thirdsite/original/2X/9/9da3805b64b327d162cff7e37646516b0deb30cb.png)

```auto
Server.default.options.inDevice_("Built-in Microph");
Server.default.options.outDevice_("Ortizan X10");
s.boot;

```

depending on what combination of devices I set, I either get:

```auto
get kAudioDevicePropertyStreamFormat error ?ohw
could not initialize audio.

```

or

```auto
ERROR: Input sample rate is 8000, but output is 48000. Mismatched sample rates are not supported. To disable input, set the number of input channels to 0.
could not initialize audio.
Server 'localhost' exited with exit code 0.

```

What is the correct way to set this up?

---

<div class="post-metadata">

### Author: ![luka](https://forum.toplap.org/letter_avatar_proxy/v4/letter/l/a587f6/32.png) [@luka](https://forum.toplap.org/u/luka)
#### Post date: [28 April 2024 18:30 UTC](https://forum.toplap.org/t/sample-rate-mismatch-server-wont-boot/2048/2 "2024-04-28T18:30:42Z")

</div>

> [@taguniversalmachine](#):
>
> `Built-in Microph`

it seems like both in and out devices need the same sample rate.  
so you need to setup your Built-in Mic the same sample rate as output device (Ortizan X10)