USB audio not recognized

KBert

Well I feel like I am getting closer. Again I can confirm that this is working on my Windows machine. First of all I was incorrect in what chip I am using. I stated a PCM2606 and in reality it is a PCM2707CPJTR. The circuit is essentially the same. I did find out that the pull up resistor I had on D+ was setup incorrectly. This needs to go to the USB five volts and not just any five volts. With this in mind I actually removed all external power from the circuit and ran all the power and ground to just the USB. It now sounds great with the Windows desktop. I tried it in the Pi Zero W and again nothing showed up in the syslog and all I can hear is an electronic whine. So I tried it in the Pi 2 as it is easier to play with.

Now it still gives me an error, but it at least recognizes what is plugged in and not that something is attached:

I am going to do some more searching and see if I can get any further on this tonight, but if anyone has any more ideas I am more than open to hearing them.

Thanks everyone!
KB

KBert

Just an update: it is working on the Pi 2. There is a horrible buzzing which is probably caused by a grounding issue somewhere, but it works. I have a game in Retropie playing sound now.

Now I just need to figure out why the Pi Zero does not see it.

KB

EDIT: Buzzing sound was from headphone jack ground coming out of breadboard. Sounds great now. Works just fine on Pi 2 but still not recognized on Pi Zero W. I have tried in various ports on the USB hub.

Any more ideas?

backstander

@KBert

Any more ideas?

Test with another/different powered USB hub? Maybe borrow one from a friend?

Also maybe get a Bluetooth keyboard to pair with the Pi Zero W and try the USB audio connected without a USB hub.

Clyde

@backstander said in USB audio not recognized:

Also maybe get a Bluetooth keyboard to pair with the Pi Zero W and try the USB audio connected without a USB hub.

Or enable SSH in Retropie, install Putty in Windows, and control the Pi via network, making the keyboard obsolete.

KBert

@Clyde

I am SSHed into the Pi Zero, but not over wifi. Instead I have a USB to Ethernet adapter. I haven't successfully managed to get wifi working in the lab (not my private network). I need to enter a username and password instead of just a password to make it work. I have tried a few times, but no luck. I also can not connect to the Pi using the second ethernet port on the wall. The IT guys seem to block any Raspberry Pi. I have a router that connects to my Pi that I also have my desktop connected as well.

I am trying to hunt down another USB hub. Failing that I will grab a wireless router and try and set the Pi up on that so I can connect from my desktop and then plug the USB audio in directly.

I will let you know what happens.

Thanks!
KB

Clyde

@KBert If you are using the Pi via SSH, could you please post any shell output in a code block instead of a picture? Like this:

It really helps with readability, and the forum search can find the text within it if someone else looks for it. :) (Syntax highlighting looks funny in normal sentences.)

I'm eager to hear any progress from you.

KBert

My apologies for not putting things in proper form while posting. I will try to behave better in the future.

Also I have run into another issue. I could not find another USB hub and my Pi is insisting that there is "No wireless interface found". I have a wireless router ready to go so as soon as I get this Pi online I will be able to update on my audio issue. I probably won't have an update until tomorrow or later in the week depending on how time goes. Sorry to make you wait.

Thanks!
KB

Clyde

Take your time, I don't think anyone here will go crazy due to some days of waiting. Patience is a virtue. ;)

Good luck!

KBert

@Clyde

Indeed. In fact it's time to go home and spend some time with my wife and son.

Thanks!
KB

mitu

Make sure the Wifi adapter isn't blocked - run sudo rfkill unblock all before trying again to connect to Wifi.

KBert

@mitu
Thank you for the suggestion. Unfortunately this was one of the things I tried yesterday that didn't seem to make a difference.

Thanks!
KB

KBert

I found another USB hub. This was was unpowered and would no support more than one device at a time on the Pi Zero. I then tried connecting only the keyboard to the Pi. I put in the :

tail -f /var/log/syslog

and unplugged the keyboard. It showed that the device was disconnected. I then plugged in my USB audio circuit and again nothing happened.

I still have not managed to get the wifi working.

Thanks!
KB

KBert

Well I am starting to think that this USB audio chip I have is simply not compatible with the Raspberry Pi Zero W. My reasoning:

1 - USB Circuit works fine with Windows Desktop and with Raspberry Pi 2.
2 - USB Circuit not detected through USB Hub on my original Pi Zero W.
3 - Loaded Retropie 4.5.1 on spare SD card and plugged it into spare Pi Zero W. Without modifying config and overlays to run DPI I was able to get wifi working without any trouble.
4 - Using SSH logged into the Pi and then plugged the USB audio circuit directly into USB on Pi Zero W.

USB audio still not detected.

I think I am going to have to look for a different chip.

I do find it curious that it works on a Pi 2 but not a Pi Zero.

Thanks everyone for the help. I will check back in when I have a different chip.

Thanks!
KB