I love my Pistomp :-). However there are some issues and desires......

[maarthome]

Hi Randall,

Ik really love Pistomp :-) Thanks!
I have set the audio to 48kHz, 64 frames and 3 periods.... And overclocked the RPI5 to 3 GHz..... resulting in very smooth operation!!

However I noticed some imperfections.....

1 Calf pluging do not work
2 Fluid plugins do not work

error message:
Nov 11 15:55:29 pistomp mod-host[690]: lilv_lib_open(): error: Failed to open library /home/pistomp/.lv2/FluidEnsemble.lv2/FluidPlug.so
(/home/pistomp/.lv2/FluidEnsemble.lv2/FluidPlug.so: ELF load command address/offset not page-aligned)
Nov 11 15:55:29 pistomp mod-host[690]: can't get lilv instance

3 On the Pistomp you cannot select NAM files for the neural Amp Modeler (Strangely enough, this is possible for Ratatouille :-)(https://github.com/brummer10 (GREAT!!! plugin!!!)))

4 LV2 presets are save in ~/.lv2 ...... Nicer to have a seperate directory. Can you give a hint?

Wishlist:

Is it possible to implement the MOD-UI improvements of: https://github.com/sejerpz/alabs-mod-custom-images?

Thanks again!
Maarten

[maarthome]

PS... is there an electronics schematic available of Pi-Stomp version 3? 🙏🙏🙏🙏

[geedubess]

re page sizes / alignment: others (eg https://community.blokas.io/t/beta-patchbox-os-bookworm-arm64-2024-04-04/5163/58) have found this to be a problem, and switched to a kernel with 4k pages.
In /boot/firmware/config.txt, I am using kernel=vmlinuz-6.12.9-v8-16k+, but you could presumably switch to kernel8.img to lose the rpi5 optimizations (including 16k page size).

HOWEVER, I was receiving a different error on my image when I tried to load any fluid plugins (and I would prefer to remain on the optimized kernel image):
Dec 11 20:05:42 pistomp mod-host[694]: lilv_lib_open(): error: Failed to open library /home/pistomp/.lv2/FluidDrums.lv2/FluidPlug.so (libfluidsynth.so.2: cannot open shared object file: No such file or directory)

$ find / -name libfluidsynth.so* 2>/dev/null
/usr/lib/aarch64-linux-gnu/libfluidsynth.so.3.1.4
/usr/lib/aarch64-linux-gnu/libfluidsynth.so.3
/usr/lib/aarch64-linux-gnu/libfluidsynth.so

$ dpkg -l |grep fluid
ii  libfluidsynth-dev:arm64              2.3.1-2                          arm64        Real-time MIDI software synthesizer (development files)
ii  libfluidsynth3:arm64                 2.3.1-2                          arm64        Real-time MIDI software synthesizer (runtime library)

It seems that the pre-built plugins in the image (presumably retrieved as from
https://github.com/TreeFallSound/pi-stomp/blob/pistomp-v3/setup/plugins/get_plugins.sh) are linked against libfluidsynth2:arm64, and debian bookworm has moved on to libfluidsynth3:arm64.

so I:

echo "deb http://deb.debian.org/debian bullseye main" | \
  sudo tee /etc/apt/sources.list.d/bullseye.list
apt update
apt install libfluidsynth2:arm64

and now all of the fluid synths work for me on my new rpi5 with installed pistompOS-2025-11-05.img.xz.

As to one of your other points, my CALF plugins seem to work (but I have not tested them all). For example, I just threw on the Calf Saturator and it worked with no logged errors.

[maarthome]

Hi Greg,

Thanks a lot! Your input did the trick.
My fluid synth plugins work now 😃

Enjoy your day!
Maarten