You should not need to modify system files at all. Everything should work without additional configuration.
What version of HiFiBerryOS are you using and what sound card is detected by HiFiBerryOS?
Hey HiFiBerry team,
Thank you for the quick reply.
Unfortunately I can not use the HiFiBeryOs. I use the Raspberry PI OS alias Raspbian.
Linux Kernel:
```
$ uname -a
Linux raspberrypi 5.15.84-v7l+ #1613 SMP Thu Jan 5 12:01:26 GMT 2023 armv7l GNU/Linux
```
the card is not recognized at all
Output aplay:
```
# aplay -l
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: Headphones [bcm2835 Headphones], Gerät 0: bcm2835 Headphones [bcm2835 Headphones]
Sub-Geräte: 8/8
Sub-Gerät #0: subdevice #0
Sub-Gerät #1: subdevice #1
Sub-Gerät #2: subdevice #2
Sub-Gerät #3: subdevice #3
Sub-Gerät #4: subdevice #4
Sub-Gerät #5: subdevice #5
Sub-Gerät #6: subdevice #6
Sub-Gerät #7: subdevice #7
Karte 1: vc4hdmi0 [vc4-hdmi-0], Gerät 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0
Karte 2: vc4hdmi1 [vc4-hdmi-1], Gerät 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0
```
What overlay did you configure in /boot/config.txt.
We also recommend to disable onboard sound.
Thanks for the support.
Ok, I have now removed the onboard sound.
i think i should not remove the hdmi. or am i wrong?
```
# aplay -l
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: vc4hdmi0 [vc4-hdmi-0], Gerät 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0
Karte 1: vc4hdmi1 [vc4-hdmi-1], Gerät 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0
```
and these are the overlays i tried.
[all]
force_eeprom_read=0
#dtoverlay=hifiberry-amp
#dtoverlay=hifiberry-amp3
dtoverlay=hifiberry-dacplus
Br,
dacplus is wrong, the correct overlay is hifiberry-amp3
In general I would also recommend to remove HDMI audio. Having multiple active sound cards makes things usually more complicated and many applications will just use the default sound card (which is = if you didn't configure something else).
Ok I understand and thank you for the explanation.
Now I have also remove the HDMI audio output.
and set the correct overlay hifiberry-amp3. but unfortunately, success is still missing.
do you have any other ideas what i could do?
here are the current outputs:
```
# aplay -l
aplay: device_list:274: keine Soundkarten gefunden ...
# tail /boot/config.txt
[all]
force_eeprom_read=0
dtoverlay=hifiberry-amp3
```
Br,
Could be a hardware problem with either the Pi or the Amp3. To check this, it's best to use HiFiBerryOS and check if the sound card is detected correctly in HiFiBerryOS. If it isn't, it's more likely a hardware problem, otherwise it's probably a configuration issue.
BTW: What kernel version or you using? Does your system have the amp3 overlay in /boot/overlays?
hey thanks for the great support. You were right it was a hardware defect my raspberry is broken.
With the new Raspberry it works fine.
So I can confirm the Raspbian with the HiFiBerry-AMP3.
I would still update this page:
https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/
and insert a section over the hifiberry-amp3 overlay
but really great support thank you.
Br,
Nicola