Fates - Troubleshooting

You can also try ApplePiBaker if you're on MacOS. Otherwise you may be looking at various arcane dd commands.

Be sure you are using a good power supply. The Pi 3b+ needs a 5V 2.5A power supply. The Pi 4 requires a 5V 3A power supply. Buy one of the official Raspberry Pi power supplies if you're not sure.
Be sure you're using a good quality USB-C cable (and it's not just a "charging" cable)
DO NOT TRY TO POWER FATES FROM YOUR LAPTOP USB-C Ports. Use a dedicated 3A power supply.
Check your input voltages

This happens because the Jack Audio system is not starting properly. A number of things can cause this. There is a information and support thread on the "lines" forum here
Check the orientation of the 2.2K resistors. They should be horizontal, not vertical.
Check the 3.3v voltage regulator. This powers the DAC so if it's not right, the DAC won't initialize. See the "check your voltages" link above to test.

SSH to the pi/fates to conduct these tests. Have your audio outputs and inputs connected to speakers/mixer and a sound source.

A low level test…
Firstst stop jack, so we can test the DAC directly with ALSA

sudo systemctl stop norns-jack.service

Now use aplay to play a wave file.

aplay ~/dust/audio/common/waves/01.wav this should play a simple clean bell tone

An alternate test is speaker-test
speaker-test -t wav -c 2 -l 3 -D hw:0,0

This will play a female voice saying "front right" and "front left" in each channel 3 times.

Record 15 seconds of audio from the inputs and save to a .wav file arecord -f dat -vv -V stereo -d 15 ~/audio-test.wav

Play back the same audio file
aplay -vv -V stereo ~/audio-test.wav

sudo reboot to get things back to normal.

See Frequently Asked Questions for other general info

okyeron / fates