#2367

Was using the norns shield with a powered USB hub and was noticing xruns when using passersby. I checked journalctl and saw:

Feb 05 11:37:11 norns kernel: Under-voltage detected! (0x00050005)
Feb 05 11:37:17 norns jackd[292]: JackEngine::XRun: client = SuperCollider was not finished, state = Running
Feb 05 11:37:17 norns jackd[292]: JackAudioDriver::ProcessGraphAsyncMaster: Process error
Feb 05 11:37:17 norns jackd[292]: JackEngine::XRun: client = SuperCollider was not finished, state = Running
Feb 05 11:37:17 norns jackd[292]: JackAudioDriver::ProcessGraphAsyncMaster: Process error
Feb 05 11:37:17 norns jackd[292]: JackEngine::XRun: client = SuperCollider was not finished, state = Running
Feb 05 11:37:17 norns jackd[292]: JackAudioDriver::ProcessGraphAsyncMaster: Process error
Feb 05 11:37:19 norns jackd[292]: JackEngine::XRun: client SuperCollider finished after current callback
Feb 05 11:37:19 norns jackd[292]: JackAudioDriver::ProcessGraphAsyncMaster: Process error

am I correct in thinking that I basically need to get a better/more powerful power supply?

#2368

correct. the CPU was underpowered, which can cause failures like you saw.

do you mean you were powering the entire shield off a USB hub? that’s not a good idea. you need a dedicated high power (2-2.5A preferably) power supply.

also, if you’re using all four USB device ports and are pulling a lot of power, you might actually want to use a powered hub to relieve power draw from the pi itself.

please let me know what you find out!

2 Likes
#2369

The hub in question has a “charging port” that supposedly provided 2.4A but I had an audio interface also connected to it which might’ve prevented it from not having enough power draw. I didn’t encounter any problems switching to a dedicated wall wart :+1:.

#2370

Apologies for the double post, but has anyone released a script or app for doing sample cutting/editing ala- mpc or octatrack? I mostly am looking for something that could show the waveform, zoom in/out, and save new samples.

#2371

I believe most of not all of these features are available in @Justmat’s Sam.

2 Likes
#2372

This is exactly it, thank you!

#2373

Im getting sound through norns but it all appears to be dry signal. Has anyone encountered this?

The master level meter responds when I play samples via TAPE - but when im playing audio via the audio in I hear it but it doesn’t show up in the master level meters, nor does it respond to a script thats loaded. Trying to get some kind of response from something simple like greyhole but its just totally dry signal. Feeling crazy. any ideas?

edit - now ive got mangl to work but greyhole still isnt. maybe im doing something wrong the system is still unfamiliar / confusing to me

#2375

Where does norns store the wifi passwords and settings if you want to clear them?

#2376

the built-in utility should clear network details when you tell it to. otherwise, you can ssh into norns, and delete the /etc/NetworkManager/system-connections/<network-name> file for your wifi network. note that this needs to be done using sudo, as the normal user account doesn’t have perms to access the file.

1 Like
#2377

nope. unless monitor is turned up and engine is turned down in mix page (or the system preset which underlies it.)

thats weird. haven’t seen any issue with meters except (i think) for one regression that was quickly patched some versions back. i think i have also seen something mentioned on the fates thread. (are you running fates? maybe there is a system issue obstructing the OSC packets which carry the VU levels from crone -> matron.)

#2378

Any ways to do MIDI-mapping on the LEVELS page (out in, mon ext, cut tp)?

#2379

FWIW - I’ve never run into this.

@yorke could you post a photo of your MIX/levels page? and then also give a little more detail about what you’re doing with one specific script? Greyhole or example wants audio-in + the eng level turned up

1 Like
#2380

included in next update

3 Likes
#2381

Found the issue (really strange)

I had the input signal plugged into the OUT2 jack instead of the IN1 - which somehow resulted in signal actually going through the unit, but at a low level that did not effect the mix level bars but was audible nonetheless. The signal was unaffected by greyhole processing and was output as dry signal through the headphone out. did not try it with other effects.

#2382

got a new weird issue…
this has happened the last two nights in a row when i am getting ready for a noiz session…
running the latest OS.

upon waking up norns it does not see any of my USB connections.
i unplugged all of them.
removed any instance (if there was one) in the system pages.
reboot from sleep and tried restart.
reconnected everything…still nothing seen or connected via USB.

however…switching scripts would “wake up” the USB connections and the USB peripherals would power up.
:partying_face:
and then it was noiz as usual.

any ideas what’s going on here?

thanks for any help!

#2383

is there anything obvious preventing a softcut recording to be immediately implemented as a sample for a granular synth process?

#2384

the headphone out is a gain stage after the line-level main outs. you were dumping an external signal into to the audio output circuit on the norns, before the headphone amp stage. yay

#2385

that makes sense. LOL

#2386

ok more issue spamming:

I’m getting a lot of errors trying to just boot up here. Occasionally I’ll start the machine and everythings fine, then today I start and none of the K buttons respond - so a hard reset - then wifi isnt working - sleep cycle - grid and arc not responding - audio reset and sleep cycle - try changing usb input jacks - nothing - issues continue.

this has happened two or three times now

Should I do a fresh install?

#2387

hey connor, sorry to hear about the troubles :confused:

are you running a “factory” norns, a norns shield, or fates? that always helps with sorting starting points for support.

a fresh install might help, but there might be other things depending on your config. are you also seeing anything weird in maiden (when you are able to connect to wifi)?