Welcome to the forums and thanks for sharing.
This is definitely possible.
The Pi Zero only has 1x USB output in the form of a micro usb port
or 2 data pads (22 and 23 shown below) that you can harness. (1 or the other).
It's easier to utilise the pads when building a handheld IMO.
I've not used that USB audio device before but it should work perfectly fine. That said, looking at your picture and the link provided, there are a couple of issues for you to fix.
1) You need to give the USB audio device a
data and
power feed where you have removed the male USB. Currently nothing is connected. Sometimes its written (5v, GND data +, and data -) on the device, perhaps on the other side of what the picture shows?
-
The order is Red (5V), White, Green, Black (GND)
Wire the data from the Pi USB pads (see below) and wire the 5v and GND from the Helder power board you're using in the picture. Most USB audio devices have a power indicator light which will flash once connected correctly.
- pi pads.PNG (326.32 KiB) Viewed 4142 times
2) Looks like you've wired the USB audio card it to the microphone jack pads, not the audio out pads. You'll need to swap these over.
Im unsure of the layout of that device but worst case trial and error once its wired up to test for audio and channels. (A good test for both channels is Super Mario Land on Game Boy. Gold coins will not sound if you only have one channel active).
3) Assuiming the amp connects to a speaker?
4) Make sure you change the default Pi audio to USB from PWM - See here:
https://sudomod.com/forum/viewtopic.php?t=144
Let us know how you get on.
