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Unable to Upload iPhone .m4a Audio Files (MIME Type Issue – audio/x-m4a)

hellencharless
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1 day 20 hours ago #274090 by hellencharless

Unable to Upload iPhone .m4a Audio Files (MIME Type Issue – audio/x-m4a) was created by hellencharless

Hi everyone,I’m currently facing an issue with the File Upload question type in LimeSurvey and would really appreciate some guidance.Environment:

LimeSurvey Community Edition: 6.16.13+260316
Server: Own hosting
PHP: Standard setup (fileinfo enabled, no custom magic settings)

What I’m trying to do:
Allow users (especially iPhone users) to upload recorded audio files.Problem:
Initially,

Code:

.m4a

files were rejected due to the extension not being allowed. After adding

Code:

m4a

as an allowed file type, I now get this error:

“Sorry, unable to check extension of this file type audio/x-m4a.”

Observations:

iPhone recordings are uploaded as
Code:
```
.m4a
```
but with MIME type
Code:
```
audio/x-m4a
```
Running the
Code:
```
file
```
command on the server correctly identifies the file as:
ISO Media, Apple iTunes ALAC/AAC-LC (.M4A) Audio
My
Code:
```
config.php
```
does not include a
Code:
```
magic_database
```
setting
PHP seems to detect MIME types normally in other cases

From what I’ve read, LimeSurvey can sometimes fail if the MIME type is not recognized properly or not included in its validation list . I also noticed similar errors reported when MIME detection fails or is unsupported .Questions:

Is
Code:
```
audio/x-m4a
```
officially supported in recent LimeSurvey versions?
Do I need to manually extend the MIME type mapping somewhere (PHP, server, or LimeSurvey config)?
Would updating or replacing the
Code:
```
magic.mime
```
/ fileinfo database help in this case?
Is there a recommended workaround for iOS uploads specifically?

Any suggestions or pointers would be really helpful.Thanks in advance!