I'm wondering if this file was ever built, at least under MinGW ...
Things which are not defined at all:

miniaudio.h
ma_result

Here are first few errors:
In file included from playback.c:18:
miniaudio_vorbis.h:22:2: error: #error "include miniaudio.h without implementation first"
In file included from playback.c:18:
miniaudio_vorbis.h:29: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ma_decoder_init_vorbis__internal'
In file included from miniaudio_vorbis.h:38,
from playback.c:18:
minivorbis.h: In function 'vorbis_granule_time':
minivorbis.h:14829: warning: integer constant is too large for 'long' type
In file included from playback.c:18:
miniaudio_vorbis.h: At top level:
miniaudio_vorbis.h:40: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ma_decoder_internal_on_seek_to_pcm_frame__vorbis'
miniaudio_vorbis.h:47: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ma_decoder_internal_on_uninit__vorbis'
miniaudio_vorbis.h:56: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ma_decoder_internal_on_read_pcm_frames__vorbis'
miniaudio_vorbis.h:90: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ma_decoder_internal_on_get_length_in_pcm_frames__vorbis'