Samples on USB stick does not work

Cedric posted May 6 '17, 12:10:


I have setup Samplerbox in "light" version : Raspberry Pi 3 only.
First, I have successfully loaded the boot image on the micro-SD card, plug my Midi keyboard (M-Audio Axiom mini Air-32) and my headset.
That works great with the default samples.

Next, I downloaded other samples from this websites and copied them to a USB stick respecting the folder tree as recommended in the FAQ .
I plugged the USB stick into the Raspberry Pi and rebooted it.
From here, I did not get any sound.

Do you have an idea of what is going wrong ?

John posted May 9 '17, 14:00:

pls clarify, What are your folder and sub folder names?

Cedric posted Jun 7 '17, 22:07:

My USB stick tree is the following :

/1 Flute2
/2 LatelyBass

Each folder has its own WAV files, bank of sounds downloaded from
I have tried with different USB sticks, same issue.

I only get the default bank sound included in the default samplerbox package installed on the SDCard connected into my Raspberry.

Of course, for the moment I have got no button to switch from a folder to another (buttons + and -), but using an USB stick should make my Samplerbox using at least what is in the folder /1 of the USB stick, right ?

I am still looking for a solution.

AlexM posted Jun 8 '17, 05:06:

Hi Cedric,

Sounds like the script isn't looking for your USB stick. You will need to edit line 18 of the file to:

SAMPLES_DIR = "/media/" 

FYI the next release will remove the need to edit this file and will auto-detect a connected USB stick :)

Cedric posted Jun 8 '17, 08:52:


the setting SAMPLE_DIR in is already present and correctly configured (I did not do anything, it was included in the package).
Anyway, being on CLI, I plugged the current USB stick again and I get an error message and I see nothing under Media folder.
Now I am using another USB stick and I can see its content under /Media (folders corresponding to the instruments with a number at the beginning of the title).

Now, how can I use these instruments considering that I have not yet buttons plugged into the GPIO pins ? It seems my MIDI keyboard does not have anything to do this.

Thank you very much.

P.J.L. Cuijpers posted Jul 11 '17, 19:27:

Having the same problem here. Is it a matter of properly formatting the USB first?

HansEhv posted Jul 11 '17, 23:26:

In samplerbox samples are loaded from the USB interface device SDA1. USB sticks however don't always have a partition table and in that case the filesystem should be mounted from SDA. You can check your situation with the "lsblk" command. Here's the /etc/fstab line for resolving the SDA issue:

/dev/sda /media auto ro,nofail 0 0

See also discussion on

AlexM posted Oct 9 '17, 07:22:

Hey guys - I ran into an issue with one of my USB sticks. It was formatted as exFAT instead of the required FAT32 and hence not found by my RPi. All we needed to do was install a package that enables support for exFAT filesystems:

mount -o remount,rw / # remount main partition as read-write
apt-get -y install exfat-fuse # install exFAT support driver
Rajiv Deo posted Oct 10 '17, 13:20:

I found that there should be no spaces or line return in the definition file, otherwise it does not load.

H3rv3 posted Oct 11 '17, 19:33:

Try folder 0 if you don't have the buttons.
Had this issue and found that the folders start at 0 (check

Eric posted Oct 11 '17, 19:54:

Can you specify? So I can just name a folder "0 Flute" on my USB, and it should automatically run that, when I turn it on with the usb plugged in?

Fabi posted Jul 29 '19, 22:26:

I know this is an old post but I seem to have the same problem as OP. Initial sound works fine but when using a USB Stick with a downloaded sample (0 GrandPiano) it does not play anything. Tried 2 differen USB Sticks with same result. It shows some no DMA platform data message on screen..

HansEhv posted Jul 30 '19, 23:51:

Samples are loaded from the USB interface device SDA1. USB sticks however don't always have a partition table and in that case the filesystem should be mounted from SDA. You can check your situation with the "lsblk" command. You can change this behaviour in the /etc/fstab. Discussion in gives more detail.

Fabi posted Jul 31 '19, 21:54:

Thanks for your reply!
It actually seems to be correct lsblk returns this:
`-sda1 ... part /media/

Nevertheless, I have tried changing /etc/fstab to use /dev/sda instead of /dev/sda1 and it does not work either..

Any other ideas?

HansEhv posted Aug 4 '19, 21:50:

Well, next thing is contents. Does /media show '0 piano' etcetera. Next after that: what does en show wheb started manually (stop the autostarted one with 'systemctl stop samplerbox' first). In other words, local debugging to get more info than just 'it doesn't work'.
Because it works... Usually :-)

Adam posted Sep 8 '19, 17:06:

Having the same troubles. Going to try formatting my USB a few different ways and then if that don’t work I will hook up my keyboard and screen and check out the py files

Adam posted Sep 8 '19, 19:51:

I have a 7 segment screen. When I turn on it shows L000 and then changes to 0000 and the default sound works fine. When I push the button it changes to E001, E002 etc but I’m getting no sound.

Adam posted Sep 8 '19, 20:41:

Can someone tell me the command to turn off the read/write

HansEhv posted Sep 9 '19, 00:00:

You only have the sample set "0 Saw". When you start the box it loads set 0 (L000, L meaning load) and when ready, you have 0000 (meaning 0).
When you push the button you ask to load set 1, but this is not present, so it results in E001 (Empty 001). As simple as that.
Read/write is turned off at startup.

Adam posted Sep 9 '19, 08:30:

Yeah but I want to turn on read write so I can have a look under the hood. I’m guessing I need to turn it off again after?

I thought it meant empty. Back to the drawing board. Come on you usb!!!

Adam posted Sep 9 '19, 09:06:

I got you know there’s a script to turn off read write at startup. Time to figure this out

HansEhv posted Sep 9 '19, 12:10:

Standard mount command with option (-o) ro or rw. It's shown in the motd when you login to the commandline.
Mounting ro is indeed somewhere in the startup, but why search for single commands which are basic Linux?

Adam posted Sep 9 '19, 13:20:

Ive managed to get my samples loaded now but but now i have a new problem. When i hold a some keys i get sound for a few seconds then it freezes. I cant change track and no more sound.
Could it be my USB is too slow at data transfer? Maybe its my Pi, im using a zero...

Ukranio posted May 2 '20, 22:49:

In my case did not detect the USB because I had it formatted with blocks of 8KB, I formatted it in Windows with a block size of 4KB and it works perfect!


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