Image is read-only/write-protected

Hello SamplerBox buddies,

This idea of using SamplerBox is very awesome. It works great on Keystep 37 keyboard, however, the onboard Raspberry Pi audio sounds faint or awful quality. Hence, I bought Pimoroni Pirate Audio Amplifier board. Downloaded from samplerbox.org and clicked “download the ready-to-use ISO image” and flashed by Belena Etcher on SD card.

The main issue is that the image is read-only/ write-protected. Following the instruction to rewrite by typing mount -o remount,rw/ then it shows a list of abbreviations. What does that mean? Four attempted of trying to get edit on config.txt and none are successfully.

Attempt 1: mount -o remount, rw/root/SamplerBox/samplerbox.py

Result: mount can’t find

Attempt 2: /boot/config.txt

Result: No such file or directory

Attempt 3: /root/SamplerBox

Result: is a directory

Attempt 4: nano /boot/config.txt

Result: Blank screen with bottom of options

Typed dtoverlay=hifiberry-dac

gpio=25=op,dh

Exit ^X enter Y to save config.txt

[Error writing boot/config.txt. Read-only file system]

The baby step is to add the line on config.txt, that is all I need to figure it out. Please let me know if there is another way around to get work. I even tried to wipe SD card to reinstall- first Raspbian Buster then manual install of Samplerbox but it won’t wipe or delete because of read-only. I also did try add config.txt on Windows 10 and Mac Catalina but it still won't let me add because of ready-only. I don't understand why.

Thanks

In the first statement, leave a space between "remount,rw" and "/".

Wow, that is very tiny mistaken but it is progress. :) nano /boot/config.txt shows a blank screen and I typed. It saves and reboot but then test hear through Pirate Audio Headphone is not working. No different when I saved it then rebooted. I took the SD card out into Mac computer. Opened config.txt with VSC to add lines. It cannot allow me to add lines because of read-only. I did tested SamplerBox/samplerbox.py and there shows a wriiten. Cool colors. I haven't edit there. Just wanted to focus on getting done with config.txt first then later can focus on setting st7789 display and buttons.

OK, didn't realize you wanted edit on the /boot (didn't read properly, sorry).
That's a separate filesystem (samplerbox has 2 as most pi-OS's).
With the "/" you remount the root partition and with "/boot" you do the same with the boot partition.
Remember to properly shutdown when having filesystems read-write.
This is also the reason why samplerbox is setup as completely read-only, you can just pull the plug.

I created a website with complete step-by-step instructions for creating an inexpensive up-to-date software version SamplerBox using the Pimoroni Pirate Audio Hat — high quality audio, color LCD and buttons -- with no wiring or soldering required..

chromakinetics.com/samplerbox

Hi Glenn, can you update instructions for the Pi 4?