Filetype for m4a (Audio) not guessed correctly


my files blueprint has set some accept specs:

  mime: [...] audo/m4a, audio/x-m4a [...]

Unfortunately kirby throws the following exception

so it seems guess a wrong file format.

Any hints on how to teach kirby (or whatever other component) to guess to correct type?

Thanks in advance,

Thomas E.-E.

You have a typo here, but that’s probably from copying here and not the issue.

In your server config or .htaccess, you can set the mime types for files

Seems they recently stopped providing a htaccess file with the HTML5 Boilerplate, which is annoying, there was a lot of good stuff in there!

Fourtunatly, i have a copy, so here those rules…

# ----------------------------------------------------------------------
# | Media types                                                        |
# ----------------------------------------------------------------------

# Serve resources with the proper media types (f.k.a. MIME types).

<IfModule mod_mime.c>

  # Data interchange

    AddType application/atom+xml                        atom
    AddType application/json                            json map topojson
    AddType application/ld+json                         jsonld
    AddType application/rss+xml                         rss
    AddType application/vnd.geo+json                    geojson
    AddType application/xml                             rdf xml

  # JavaScript

    # Normalize to standard type.

    AddType application/javascript                      js

  # Manifest files

    AddType application/manifest+json                   webmanifest
    AddType application/x-web-app-manifest+json         webapp
    AddType text/cache-manifest                         appcache

  # Media files

    AddType audio/mp4                                   f4a f4b m4a
    AddType audio/ogg                                   oga ogg opus
    AddType image/bmp                                   bmp
    AddType image/svg+xml                               svg svgz
    AddType image/webp                                  webp
    AddType video/mp4                                   mp4 f4v f4p m4v
    AddType video/ogg                                   ogv
    AddType video/webm                                  webm
    AddType video/x-flv                                 flv
    AddType audio/mpeg                                  mp3

    # Serving `.ico` image files with a different media type
    # prevents Internet Explorer from displaying then as images:

    AddType image/x-icon                                cur ico

  # Web fonts

    AddType application/font-woff                       woff
    AddType application/font-woff2                      woff2
    AddType application/               eot

    # Browsers usually ignore the font media types and simply sniff
    # the bytes to figure out the font type.
    # However, Blink and WebKit based browsers will show a warning
    # in the console if the following font types are served with any
    # other media types.

    AddType application/x-font-ttf                      ttc ttf
    AddType font/opentype                               otf

  # Other

    AddType application/octet-stream                    safariextz
    AddType application/x-bb-appworld                   bbaw
    AddType application/x-chrome-extension              crx
    AddType application/x-opera-extension               oex
    AddType application/x-xpinstall                     xpi
    AddType text/vcard                                  vcard vcf
    AddType text/vnd.rim.location.xloc                  xloc
    AddType text/vtt                                    vtt
    AddType text/x-component                            htc