How do you change the jack buffer size? I think I’m doing it right, but wanna make sure. I go to /etc/systemd/system then edit norns-jack.service with nano then change the 128 on line 11 to 256?
Changing the buffer size won’t help if you have no sound. That’s really only a suggestion for the regular pi3 (not plus) if it gets a supercollider fail message.
For the systemd stuff you need to sudo when editing. Then reboot to get the changes.
it improves things slightly, as does the eeprom update
see previously in this thread above…
I’ve updated the fates GitHub main read me with some audio troubleshooting information based on some stuff further up the thread.
Also In you case - try connecting over ssh and run the amixer command. You’re looking to be sure “output mixer hi-fi” is set to “on”.
amixer
Does this look correct?
Simple mixer control 'Output Mixer HiFi',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on]
I went ahead and ordered another DAC, in case that ends up being the issue.
Playback: on is what you want.
I’d try the stuff I linked above to test the audio without norns and see what you get. If that ends up with no sound then re-re-re-flow ALL of your soldering one more time.
can anyone help my isolate this issue with audio working and then all of a sudden not…
heads up that awake is a very CPU lightweight script. i might suggest running a script that pushes the CPU harder for a realistic temp reading.
awake
also, the main menu on norns has a temp readout, and cpu— hit KEY2 when you’re at the HOME menu to toggle
So if I still have no output after reflowing and verifying continuity, I have to have a fried DAC, right?
i wonder if i’m experiencing the same thing…audio will be stable for an hour or so but when i reboot it causes it to no longer work:/
I am having some interesting issues identical to what @cwil describes. My Fates was working perfectly until I booted it today. I took the steps @TheTechnobear suggested to do a low-level test of the DAC. The audio from the test plays perfectly without digital noise. The noise problem seems to effect some apps more than others as well? Awake is particularly bad but less noise on Molly the Poly? ideas?
That or you have a short somewhere you can’t see. Have you removed the chip and cleaned the pads with solder wick then resoldered it?
Trying to eliminate all possibilities, tried a different image on a Raspberry Pi 3b+ and the problem persists. Input voltages are fine. The electronic noise persists, but also seems effected by delay when running awake? Very bizarre, the scale demo doesn’t have any noise. Maybe worth trying @jmsiener advice tomorrow and totally removing/reflowing the DAC
Did some late night soldering removed the DAC, cleaned the pads with wick and re-placed the same DAC. Noise issue, is gone!! Seems to have done the trick
Just a quick update on my build : I was using a regular Pi 3B and was getting lots of distorted sound even after when changing the jack_bufsize. I wasn’t sure about my power supply either (it was only providing 2.4A) so I ended buying a Pi 4 and 3A Usb-c power supply. Everything is now running perfectly fine, played a gig with it last week-end and I was amazed by the sound (Passersby) on a big PA
I think this is answered somewhere in this thread already but sadly I can’t find it… (Apologies)
As the system stands currently, which is the best / easiest-to-set-up version of the Raspberry Pi for someone just starting out on this?
generally information is at : https://github.com/okyeron/fates everything from building, to installing software
have you got the fates pcb/components? if not, @okyeron shop is at https://denki-oto.weebly.com/store/c4/Products.html#/
have you built the fates board? if not, build guide is here : (https://github.com/okyeron/fates/blob/master/hardware/Build.md)
if its just the software, then its recommended you install via image, details here: (https://github.com/okyeron/fates/blob/master/install/norns/Norns_disk_image_install.md)
Pi3b+ should be rock solid. Pi4b is fine as well.
Sometimes with those fine pitch components there’s a little solder blob underneath that you just can’t see. I’ve done this loads of times in eurorack builds before I tried a different board/chip. Built an O&C once and noticed mid build that I had broken a trace or two under around an IC. Totally got the hot air gun and just moved each component to a new board. It worked!
I did some more reflowing and have noisy sound now! Also am getting the Awake Delay noise now too. Gonna try to remove the DAC and wick the pads tonight.
