Sound doesn’t work using ALSA and no playback device found

Really dumb request but I was curious. I used this guide to install ALSA (sound control software and utils). Anyways, I followed this guide below:

https://wiki.alpinelinux.org/wiki/Sound_Setup

And I ran and got this on my iPhone:
`B-Iphone:~/jdk# speaker-test

speaker-test 1.1.9

Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver r
eturned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat return
ed error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returne
d error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or di
rectory
ALSA lib pcm.c:2564:(snd_pcm_open_noupdate) Unknown PCM default
Playback open error: -2,No such file or directory`

Not a big deal this doesn’t work. Just wanted to document it.