DIY: norns shield

infovore · 2020-01-22T19:15:34.884Z

Well, the best list lives inside the package manager in a norns.

Meanwhile, thumbing through the “norns” tag in the “Library” category on this site should get you off to a start.

fiocz · 2020-01-22T19:15:43.068Z

The first you said - It works !! Many Thanks !!

dani_derks · 2020-01-22T19:25:33.288Z

CarlosUnch:

Is there an updated list of the existing apps?

a good starting point : Redirecting…

forrest · 2020-01-23T02:42:24.232Z

Really like the case over the screen, if Im seeing that correctly! The exposed oled can be a pain to keep clean…

reminds me of one of those sit-down pac-man machines.

xyzbm · 2020-01-23T12:17:09.637Z

I’ve replaced codec and crystal and it works

AlessandroBonino · 2020-01-23T21:55:19.254Z

I had forgot to expand disk space, so I had little space left in my diy norns.
If anyone else forgot to do it, go to the Terminal and type:

ssh we@norns.local
(password: sleep)
sudo raspi-config

then select > Advanced > Expand disk
and reboot.
it went from 2Gb free to 28Gb on my 32Gb SD.

neronoia · 2020-01-24T11:27:59.934Z

Does anybody have an alternative part for the encoders? Those I can find on mouser have different shaft lenght (for D-shaft) or the same lenght but knurled shaft.

tehn · 2020-01-24T19:15:36.534Z

2 posts were merged into an existing topic: Potential group buys

CarlosUnch · 2020-01-24T11:58:25.744Z

You can always buy knurled knobs instead.

barrford · 2020-01-24T16:18:37.961Z

I bought just the populated PCB and didn’t pay any import duty or tax.
It may well be different for the full kit, and it’s often quite random as to whether the Royal Mail decide to take the tax from you or not.

XiXora · 2020-01-24T16:22:10.029Z

I imported mine with a Crow and the VAT was around £20 + the handling fee of £12.
I get caught 99% of the time. The handling fee is a flat charge no matter the cost.
The PCB alone may get around them bothering to charge it though.

tehn · 2020-01-24T19:16:25.932Z

heads up everyone. i’m moving commerce discussion to Trade, per the CoC.

infovore · 2020-01-25T22:23:23.714Z

can somebody suggest how I alter the JACK config? I don’t know JACK, or where it is, but am finding the L/R funkiness confusing…

zebra · 2020-01-26T00:31:23.068Z

i don’t know of any jack configuration option that will reverse the order of the DAC ports.

i see two options.

option 1, change the behavior of the mixer client (`c++`)

there are three JACK clients involved. one is scsynth (2x2 I/O), one is softcut (2x2) and finally the main mixer client called crone (6x6.) only crone is connected to the ADC and DAC ports. (NB that softcut is owned by the same parent process as crone.)

each of the crone clients inherits from Client, which is a template class specialized by the I/O count and given a JACK name at construction.

the function Client::connectDacPorts() programatically connects the client outputs to hardware outputs. so you could hack that function.

looking now i notice that (1) this is already hacky - must have been a stereo client originally, (2) it should really just be a MixerClient method. so i should clean this up, such that the hack doesn’t involve the parent class methods.

if you use this option, it would be helpful to do it as an optional runtime flag for crone. that way other people can easily enable it.

option 2, re-route the JACK connections after launch (`bash`)

after all the clients are running, you can use the jack_connect and jack_disconnect utilities to re-route the connections. specifically i think it would be something like

jack_disconnect "crone:output_1" "system:playback_1"
jack_disconnect "crone:output_2" "system:playback_2"
jack_connect "crone:output_1" "system:playback_2"
jack_connect "crone:output_2" "system:playback_1"

but i am kinda guessing the exact port names at the moment. you can use jack_lsp to list them.

if you do use this option, i think the best place to execute it would be when the lua stack starts up - perhaps in your version of norns/lua/core/config.lua. this would ensure the crone process is already running.

and for completness,

option 3 - caveman

switch cables or rewire the PCB.

tehn · 2020-01-26T02:16:47.785Z

option 4 - put your headphones on backwards (…kidding)

i apologize for the confusion… what i was originally suggesting was @zebra’s option 2. i’ll test and make a howto.

infovore · 2020-01-26T10:20:32.404Z

Option 3 is not stupid - I’m building quarter inch breakouts, and those are easily used reversed. It’s mainly a headphones issue, being honest.

Of course, modifying that script means it will be overwritten on every update?

My instinct would be to somehow add something like an environment variable to flag the board as a DIY one pre-revision (reversed), which then branches code in the official script. I presume Supercollider can access environment variables, of course. But that would have minimal affect on everybody else, and be a change that persists over updates.

I appreciate this affects a small amount of the norns ecosystem, but right now it’s not insignificant imho, and it’s a feature of an officially released thing, hence trying to work out how to solve this with minimal alteration but in a relatively robust way.

nitefish · 2020-01-26T16:03:58.954Z

I’m using a shield. If I want something on the right, I put it on the right…
The visual feedback we generaly have is just a number.

tehn · 2020-01-26T18:23:16.988Z

will do! this is a super easy fix and will not interfere with updates

details forthcoming with the fix

MDN · 2020-01-27T00:52:52.470Z

@tehn quick question: will this kit work with a Rasberry PI Model B v1.2 (2015)

Read that "B+ ups the speed of the CPU to 1.4GHz from 1.2GHz in the original Model B

Will this significantly effect the performance of Norns?

Thanks!

tehn · 2020-01-27T01:12:10.200Z

fixed the stereo swap issue

prior to new update release, git pull from ~/norns

then touch ~/reverse.txt (or add reverse.txt to /home/we/ — contents don’t matter, just existence)

@MDN 3B is fine. actual norns is based on CM3.