jaradical

Ok - a little more complicated than I had envisaged.

Would adding it to RTAudioCommandLine.cpp make sense? I can see two ways to handle it:

1. Like the userBelaConfig in Bela_defaultSettings - look for settings.json and populate the settings with that - probably after userBelaConfig is processed.
2. As part of Bela_getopt_long, by using --jsopts or similar and providing --jsopts settings.json via the Makefile (with file existence tests etc.)

I can see the various JSON cpp/h files and could probably have a go at coding something up using them.

Let me know what you'd prefer, and if we should move this conversation to the github issue instead?

Cheers

Oh yeah, I didn't catch that we already do a basename, I'll update my scripts accordingly.

I'm wondering if there's any way to make this more generic - something like using jq to parse the settings.json if it exists in the project directory and creating the ARGS from that or something?

Brilliant Giulio, it's working now!

I was poking around in the Makefile, but I can see that /opt/Bela/bela_startup.sh is the place to be.

I ended up doing it slightly differently like this:

         for PROJECT in "$BELA_HOME"/projects/loop_*; do
             echo Running $PROJECT;
             PROJNAME=`basename $PROJECT`
             if [ "$PROJNAME" == "MYPROJECT" ]; then
                 ARGS="-p32"
             fi
             /usr/bin/make -C /root/Bela PROJECT=`basename "${PROJECT}"` CL="${ARGS}" runonly
         done

Thanks again for your help, and if you'd like to play with it, it's here:

https://github.com/jazamatronic/bela_pepper_patches/blob/main/drumkit_bela_csound/_main.csd

Cheers

Hello,

I'm running multiple Csound projects on Pepper using the loop_* project settings (See https://forum.bela.io/d/2983-help-getting-bela-button-to-loop-csound-projects-on-pepper), and it's been working wonderfully so far.

I've been working on a kind of drum machine, and was having trouble with dropped blocks. To try and fix that I've changed Csound ksmps and the block size in the IDE (and hence settings.json) to 32. The project runs fine when launched from the IDE, but when I get to it from the bela button as part of project looping, it sounds like it's reverted to the default block size of 16 and the mismatch between the Csound ksmps and block size is causing severe distortion and loads of dropped blocks.

Is there a way to have per project block size settings when using the loop_* functionality?

Cheers

giuliomoro - I got all the projects up and running last night (and I can even nicely loop through them with the bela button!). I spent some time putting together rudimentary docs today and pushed everything to github here:

https://github.com/jazamatronic/bela_pepper_patches

Feel free to use whatever you'd like as far as examples go.

Cheers

giuliomoro Those two should be good to go, although I'm not certain they're up to date with whatever's running on my pepper. You might want to check that they behave as expected before bundling them in.

I've got a few others in the pipe - they all work nicely on my PC in CsoundQT - just have to finish up the work to get them onto Pepper - so maybe if you hold off for a little while there'll be a few more available.

I'll post here when they're ready!

Cheers

G'day Giulio,

Thanks for all the details, it certainly gave me enough to try some things out. As I'm using all of Pepper's buttons in my patch and wanted to make sure I could use the bela cape button that I'd broken out to the front panel I didn't follow your instructions to the letter. Also, it's a PITA to remove and reinstall in the rack, so I'm trying to avoid having to update/flash or what have you. Anyway I think it's mostly working now - here's how I went about it.

I created a short script, similar to /opt/Bela/bela_button_hold.sh called /opt/Bela/bela_button_click.sh that contained make stoprunning command:

#!/bin/bash                                                                                                                           
#this file is executed when the button on the Bela cape is pressed momentarily                                                        
                                                                                                                                      
CUSTOM_FILE=/opt/Bela/local/`basename $0`                                                                                             
[ -f $CUSTOM_FILE ] &&\                                                                                                               
{                                                                                                                                     
        echo "Bela button clicked, running $CUSTOM_FILE"                                                                              
        $CUSTOM_FILE                                                                                                                  
        exit                                                                                                                          
}                                                                                                                                     
echo Bela button clicked, stopping current project                                                                                    
make --no-print-directory -C /root/Bela stoprunning           

Then, I updated /lib/systemd/system/bela_button.service as such:

[Unit]                                                                                                                                
Description=Monitor the Bela cape button                                                                                              
After=networking-online.target                                                                                                        
                                                                                                                                      
[Service]                                                                                                                             
Type=simple                                                                                                                           
ExecStart=/usr/bin/stdbuf -oL -eL /usr/local/bin/bela-cape-btn --pin 115 --click /opt/Bela/bela_button_click.sh --hold /opt/Bela/bela_button_hold.sh --delay 20 --monitor-click 1                                                                                           
Environment=HOME=/root                                                                                                                

[Install]                                                                                                                             
WantedBy=default.target

Finally, I had to intercept the button press to stop csound from eating it, so I changed the /root/Bela/Makefile csound command to:

RUN_COMMAND?=bash -c 'belacsound --stop-button-pin -1 --csd=$(CSOUND_FILE) $(COMMAND_LINE_OPTIONS) 2>&1'                              

And with that, I can cycle between the two csound patches I currently have running on the board with the bela button, thanks!

Might be problematic if I mix and match engines in my projects, but for now they're all csound.

Can you spot any foreseeable problems doing it this way?

Cheers

Hi,

I've added a push button to my Pepper for front panel access to the Bela Button.
I'd like to be able to loop through my Csound projects, but I'm having trouble getting it to function as desired.
I've followed the instructions from https://learn.bela.io/using-bela/bela-techniques/running-projects-on-boot/ and have currently got two projects loop_a_project and loop_b_project.
loop_a_project starts correctly on boot, but when I hit the button, I no longer get sound from Pepper, but loop_b_project doesn' t appear to start.

Here is some messages I caught from journalctl:

Mar 22 18:47:34 bela stdbuf[251]: Button pressed, quitting
Mar 22 18:47:34 bela kernel: rtdm_pruss_irq_close
Mar 22 18:47:34 bela stdbuf[202]: Click detected -- no action

Broadcast message from root@bela (somewhere) (Wed Mar 22 18:47:49 2023):

Bela button held, restarting

Mar 22 18:47:49 bela stdbuf[202]: Bela button held, running /opt/Bela/local/bela_button_hold.sh

Note that I've changed the hold behaviour to reboot instead of shutdown.

I checked the bela_startup.service after having pressed the button, it looks like it's continuing to run:

root@bela:/lib/systemd/system# systemctl status bela_startup.service
● bela_startup.service - Run Bela at boot
   Loaded: loaded (/lib/systemd/system/bela_startup.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2016-11-03 17:16:50 UTC; 5min ago
 Main PID: 249 (bela_startup.sh)
    Tasks: 11 (limit: 4915)
   CGroup: /system.slice/bela_startup.service
           ├─249 /bin/bash /opt/Bela/bela_startup.sh
           ├─279 /usr/bin/make -C /root/Bela PROJECT=loop_a_morphing_wavefolder CL= runonly
           ├─443 /bin/sh -c sync& cd /root/Bela/projects/loop_a_morphing_wavefolder && bash -c 'belacsound --csd=/root/Bela/projects/loop_a_morphing_wavefolde
           ├─445 bash -c belacsound --csd=/root/Bela/projects/loop_a_morphing_wavefolder/_main.csd  2>&1
           └─452 belacsound --csd=/root/Bela/projects/loop_a_morphing_wavefolder/_main.csd

Nov 03 17:16:55 bela stdbuf[249]: [commit: ea6cd697190d99414f8097b385c1b0e4d61fdb04]
Nov 03 17:16:55 bela stdbuf[249]: libsndfile-1.0.27
Nov 03 17:16:55 bela stdbuf[249]: sr = 44100.0, kr = 2756.250, ksmps = 16
Nov 03 17:16:55 bela stdbuf[249]: 0dBFS level = 1.0, A4 tuning = 440.0
Nov 03 17:16:57 bela stdbuf[249]: audio buffered in 256 sample-frame blocks
Nov 03 17:16:57 bela stdbuf[249]: SECTION 1:
Nov 03 17:16:57 bela stdbuf[249]: Initialising spinlock...
Nov 03 17:16:57 bela stdbuf[249]: Starting realtime mode queue: 0xb533d010 thread: 0x16e0890
Nov 03 17:16:57 bela stdbuf[249]: Underrun detected: 12 blocks dropped
Nov 03 17:17:47 bela stdbuf[249]: Button pressed, quitting

I also tried adjusting the csound launch command to belacsound --stop-button-pin 115 but after a quick look through the code I'm not sure that particular plumbing is hooked up.

Any ideas what's going on or what to look at next to further debug?

Cheers

If you ignore the -5V source and the 1k resistor connecting it to the op-amp's inverting input you've got an amplifier with a gain of -2 (Rfb/R1 = 1000/500 = 2, and it's inverting, so -2) . Putting in an AC signal with a range of 0-5V would give you 0 to -10V on the output. Then, ignoring the AC source and the 500R resistor, and just taking the -5V and the 1K resistor, we have an amplifier with a gain of -1. So -5V in gives 5V out. Now it's a summing amplifier, so we sum 0 to -10 with 5, to give us 5 to -5V. To make it work as a summer you need to ground the non-inverting input so that the feedback forces the inverting input to 0, giving a virtual ground there.

There's probably other ways to do it, but that's how I would go about it.

Cheers

giuliomoro Also, I'd go for larger resistors.

Yes, laziness on my behalf, the default resistor value in falstad was 1k and I just ran with it.

Maybe try something like this:

https://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWcMBMcUHYMGZIA4UA2ATmIxAUgoqoQFMBaMMAKAENxiVPvttCeIPOCRMkYePBAMYk3JAAsCroWwIwCyITyFyVCZJYAnQXiq4FQqvvjGQ2bmBTCNlp8Npw7D8BgGvfARsvAHdwJXBncLc-KBYwsC4rQTBYyHjowJS0jL4BM3t+QXSwi2S85PSAeXttQQUwfyTrXLrE3iL2uIBzQRRNPoxuFoSktBcxgfSAJXtHWJ8UfqgVgYYkayhoBBZZn3cVg-0QAZRtkDONrZ2AexBiEEJLKk1iYTQtiHNww8tsFiAA

It's inverting, so you might want to put a unity gain inverting amplifier after it if you care about that, or just "fix it in software"(TM)

Thanks for the useful tip - I was seeing the same problem where my Csound projects selected to run on boot would fail with a Segmentation fault.

I can confirm that upgrading to csound 6.18 from the link above has resolved this issue.

Cheers

Hello All, first time poster here.

I built a Pepper a few months back with the goal of running some Csound on it.
Here are a couple of things I've cooked up:

A morphable wave folder: https://github.com/jazamatronic/morphing_wavefolder_bela_csound
A wave table oscillator: https://github.com/jazamatronic/wavetable_banks_bela_csound

Cheers