No Output

[berneu65]

I installed the Software on a Raspberry 3. The LCD is working, the device can be found with the service utility and the attached Monitor shows no error messages. I plugged in a Midi-Keyboard wich ist recognized, but I don't get any output.
Next I tried a sending Midi-Messages from a Pi Pico via USB and via UART, but nothing is working. I have checked the the Keyboard and the output from the pico with a Midi-Monitor, they are correct. I have checked the headphone jack of the raspberry with a linux-immage, it is working. What else can I do?

[penfold42]

Can you paste your config file here?

What version/release/build are you running ?

[berneu65]

Here is my minidexed.ini file (changed the extension to .txt).
The Version is MiniDexed_1277_2025-07-30-8f2c638.
minidexed.txt

[blixabloxa]

This is probably not a solution, but worth a try I suppose. Try setting NetworkEnabled=0 - perhaps your Pi is trying to connect to a non-existent network and it is affecting the audio output in some way?

[berneu65]

As expected, it did not help.
I liked the idea of a virtual DX7, but it is not working, so it's a waste of time.

[craigyjp]

That's a bit harsh just because your project has not worked first time. You have not stated if you have a sound card, what type it is or if you are using a PWM output.

I have successfully built two of these over 2 years ago and they worked first time. Do not diss a project because of your lack of knowledge.

This community will help you if you are polite and give relevant information regarding your issue. Like you said the display works, but your audio doesn't, so it's one of two things, a configuration fault or a hardware issue.

So tell us what are you using for the sound?

[berneu65]

In my first post, I wrote about the headphone jack of the raspberry, and I have posted my minidexed.ini, so for me it is clear that I am using PWM. Btw, I am not a newbie, I also tried HDMI. I also wrote, the sound output itself and my Midi-Keyboard are working.

[Banana71]

Hello Berneu65,
I don't know the exact solution to your problem, but I can assure you it's worth being persistent.

1. Which MIDI controller keyboard (class compliant?) did you connect to the Raspberry Pi via USB?
2. During the boot process, the Raspberry Pi logs a protocol and outputs it via HSMI. It would be great if you could share a screenshot of this with us. Photos of your project are always helpful in general.
3. Do you have an encoder connected? Can you use it to browse the menus and select different sounds?
4. Have you set the MIDI channel to 1?
5. Is the Performance.ini file in the root directory?
6. Many users have reported a wide variety of problems, and there hasn't been an obvious cause. For them, reformatting the SD card (FAT32) often helped.
7. If the miniDexed hopefully works for you soon, don't be disappointed by the sound quality. The difference between PWM and a DAC is significant.

Peter

[berneu65]

1. I am using a Behringer Swing, I don't about class comliant.
2. As I wrote, there no Error Messages. The Screen tells me only about the Version, the used GPIO-Ports, things that are enabled, and my Network-Parameters. By now, I can't send a screenshot because I have Overwritten my SD-Card with an Raspi-Image. But believe me, I worked over 3 Centuries as an IT-Professional so I am able to interpret the Messages.
3. No, but I knew the virtual cartridge is working because I use it also with my Dexed-VST.
4. Yes
5. Of course, why should I change this
6. Sorry, but that seems a bit esoteric. On my SD-Card is (was) one FAT 32 Partition with standard block size, marked as primary. Partition. And yes, I have formatted it before using for the first time.

[Banana71]

The facts: A Raspberry Pi 3 with a working display and PWM audio output.
You can't really go wrong with that. So where's the problem?

1. The MIDI controller: I'm not familiar with the Behringer Swing, but according to the user manual, it's "class-compliant." You could try connecting a USB PC keyboard to the Raspberry Pi for testing purposes. Among other things, the keys "QWERTZUYXCVBN" are sent as MIDI notes. Or, if you have one, try a different MIDI keyboard?
2. I don't doubt your skills and years of experience, but if you ever have the chance, please post some pictures, including a screenshot of your monitor.
3. & 5. What do you mean by virtual cartridge? Did you install any ROMs in the sysex/voice/ folder? Did you consider the index 000001_ROM4711.syx? The Performance.ini file accesses the first voice, and if it's muted or missing, you won't hear anything. Alternatively, you could copy any other Performance file, for example, from /performance/001_Seed/000002_Concert D.ini, to the root directory and rename it to performance.ini. These Performance files have the voice data integrated and are therefore less problematic.
4. Many users have reported a wide variety of problems, and there hasn't been an obvious cause. For them, reformatting the SD card (FAT32) often helped. :-)
5. What does the LCD display show?
6. Post the following here; you'll understand: TREE E:\SD-Card /F > structur.txt

Peter

[craigyjp]

So maybe its not a sound issue at all, maybe you are not getting MIDI ino the synth. The ports are USBHosts, so they expect to see a MIDI controller of some sort on the USB, such as a midi keyboard. You mentioned a UART to USB device, I presume that connects to a USBhost port. Have you tested that on a PC or MAC that it is actually converting the 5 pin MIDI to USB?

This needs to be set in the config after the MIDI setup.

See https://github.com/probonopd/MiniDexed/wiki/Hardware#usb-gadget-mode

USBGadget=0
#USBGadgetPin=0

[berneu65]

I talked about two things, a Midi-Keyboard via USB and an UART-Connection between the Raspberry and a Pi Pico, using the RX/TX ports and a common Ground.
Of cause I have read about the USB-Gadget-Mode, but thats not what I wanted.

[Banana71]

@penfold42 Your screen is flickering :-)

[craigyjp]

That setting disables usb gadget mode, I just wanted to make sure you had usb host mode enabled. I'm gonna drop out of this conversation, I hate talking to ***.

…

On Fri, 10 Apr 2026, 08:59 berneu65, ***@***.***> wrote: I talked about two things, a Midi-Keyboard via USB and an UART-Connection between the Raspberry and a Pi Pico, using the RX/TX ports and a common Ground. Of cause I have read about the USB-Gadget-Mode, but thats not what I wanted. — Reply to this email directly, view it on GitHub <#1024 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AMFJTAOLRQDJOL2NAWUJTM34VCEUHAVCNFSM6AAAAACXORA4AWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTMNJRGIYTOMI> . You are receiving this because you commented.Message ID: ***@***.***>

[berneu65]

Thanks for your politnes.

[probonopd]

Dear all, please let's keep this project a fun hobby. All users here are just volunteers. No one can have all hardware combinations, so all we can do is to try and be helpful.

No one is entitled to get anything here.

This being said, please keep the conversations civil, even if there is valid reason for frustration.

When in doubt, please check https://docs.github.com/articles/github-community-guidelines. Thanks!