Search:

For the measurement I only used this sketch on a Teensy 4.1. No other functions.



//**********************************************************************
// Simple scetch for receiving SysEx...

I have mesured. The maximum transfer rate for receiving SysEx Dump via Midi without errors is 0.41KB/s. This is very slow on a Teensy 4.1.
In my DIY synth with an Teensy 4.1 I will not implement...

Yes. It also only seems to work with an increase in the buffer value. I set the value to 512Byte and received 348 bytes. It's the size of a SysEx dump from a sound program in my synthesizer.

Hello
I write a simple sketch for Midi SysEx receive data today.


But receiving SysEx data with Teensy is faulty :confused:



...

Thanks. This is very interesting :)

Thanks for the information :)
I set SysExMaxSize in MIDI_Settings.h file to 512 bytes and set the transmission speed in Bome SendSX to 1.29KB/s.
There are no transmission errors.

In MIDI-OX I...

Another try with Windows App Bome SendSX, Mios Studio and MIDI-OX.
Each time I receive different data via midi. The only thing that works is reception via usbMIDI :confused:



My scetch Midi...

When i try to receive 348 Byte sysex data via midi with teensy 4.1, the data is missing and error !!!
Receive 348 Byte to usbMIDI works fine :)



MIDI.setHandleSystemExclusive(myReceiveSysEx); ...

Test of the pickup function

https://i.ibb.co/RYrYTnF/Pickup.png

Youtube: https://youtu.be/iXR4-jLjfkk

SysEx Dump works now. See short video.

It was a bit more complicated than I thought. First, conversion routines had to be developed for all 212 parameter values in the Jeannie, which convert...

SysEx Dump works now. See short video.

It was a bit more complicated than I thought. First, conversion routines had to be developed for all 212 parameter values in the Jeannie, which convert...

Annotation:


The normal processor clock of the Teensy4.1 CPU is 600MHz. I reduced the clock setting for the processor in Arduino to 24Mhz. Transmission errors no longer occur.


The transfer...

I posted your DX7 problem in Sequencer Forum. Look at here: https://www.sequencer.de/synthesizer/threads/yamaha-dx7iid-midi-dump.102499/

Greetings Rolf

Yes. Your SysEx data block is too large. With MIDI-OX a maximum of only 2048 bytes per SysEx block can be received.
Such a large block of data is not normal. All synthesizers I know send a block of...

I missing 0xF0 (SysEx start) and 0xF7 (SysEx end) in your fillBuff() function :confused:

I wrote a small Arduino sketch and tested it on a Teensy 4.1 board.
Transmission errors occur with unchanged usb.c file. With the change to usb.c file, there is no transmission error.
The waiting...

This is my code to send SysEx to usbMIDI()

In the SysEx dump menu from my synthesizer I query a key and set the sendSyssExflag.
If the flag was true then send sysex dump. I always send a block of...

Did you change the usb.c in your Arduino Library as I suggested ?

After that it is important that your project has to be completely recompiled (restart Arduino IDE).


File Path: C:\Program...

I do not understand what you mean :confused:

1.Block
F0 ....data... F7

2.Block
F0 ...data... F7

3.Block
F0 ...data... F7

In Germany we have no delivery problems. There are still many retailers who sell Teensy.

Link:...

Can you explain to me exactly which line of code you mean?

I missing usbMidi.read() in your code !



// discard incoming MIDI messages
while (usbMIDI.read()) {
// ignore incoming messages
}

If you disabled in usb.c the usb midi flush output() you have to after midi data has been sent, a flush() must be sent.

This function forces the USB layer to send the data immediately. Since the...

In MIDI-OX I discovered an error when receiving SysEx Dump. The number of received SysEx data is displayed incorrectly in the preview window of the SysEx Dump function.
Instead of 44,544 bytes, I...

Which SysEx tool are you using on the PC?

I use Mios Studio without problems. When I use MIDI-OX I have the same problems.

I think it's a bug in the teensy 4 USB library. Paul should know what doesn't work there.

I modified the usb.c in the midi library. It works. But it's not a good solution.

File Path: C:\Program...

Hello Mark

I am sorry. But unfortunately I can't help you much.

Unfortunately, I don't know much about C-classes. I copied the scope code from another open source project.


For display...

As I understand it, the usb_midi_flush_output() function is responsible for deleting unread data in the midi buffer.

Since I am constantly querying the Midi buffer in my Polyphonic DIY Synthesizer...

There is an interesting post here https://forum.pjrc.com/threads/49753-Problem-with-large-volumes-of-data-on-usbMidi?p=168107&viewfull=1#post168107

It works usb_midi_flush_output() by commenting...

I tried it with a USB 3.0 hub and directly on the USB 2.0 port on the PC. The problem remains :confused:

Now.. I have implemented USB and Midi SysEx transmission. USB often has transmission errors. Midi works without error :)




a lot of sysex data..

uint14_to_sysex2Bytes(data[207],...

Sending Patch Banks via Serial Midi works fine without errors, but is very slow :rolleyes:

I will check sysex dump function with a little arduino scretch.

I have check with Midi-OX. Its same problem :confused:

After transferring a patch (348 bytes) I wait 120ms. From time to time there are transmission errors.

Tranfer only one patch, it no error.

To protect against Buffer overflow, I made a wait time 120ms after sending each patch.

Is there a way to query a faulty USB transfer :confused:

Hello teensy friends


I programmed a midi dump function for my Synthesizer with Teensy 4.1. Transmission errors occur when I send Patch Bank data to the PC via usbMIDI.sendSysEx. The data packet...

I programmed different conversions for different floating point and integer values



//*************************************************************************
// convert float (0.0 - 0.127)...

Hi MatrixRat
The SysEx dump for a patch is very complex. The patch is stored on the SD card as a text string.
This contains values in 32-bit floating point and 16-bit integer values.
You can...

Hallo,
I optimized my code a bit. I use call-by-referense for string function and variables.
That uses less memory :)


...

Small update..

Soon there will be SysEx DUMP for Jeannie. Then nothing stands in the way of the patch exchange.

28298

The transmission path is selected with DESTINATION, eg Midi or USB
DUMP...

Hi MatrixRat

Thanks for your tip. That's a good idea :)

Hello there..


The data format for the transmission or reception of SysEx data has its pitfalls.
The data may only be 7 bits in size. Larger values lead to the transmission being aborted.
In...

Thanks :) Kits are available again at tubeohm.com

New Jeannie Video

Part 11: Filter FM and Oscillator Modulation

28012

Youtube https://youtu.be/XMchq0a07qk

Hi Andy,

this is unfortunate and complicated. We Germans have a saying: "Why keep it simple when it can be complicated?" :cool:

I am using a PCM5102A in my Synth project. Its very good audio quality and easy to plug in as a module. I use Teensy Lib with I2S output.

27798...

Hallo..

I use two LFO in my synth project. I want booth LFO with oneshoot function. How can I identify the LFOs in my audio object code?

My solution is a bit cumbersome. I use two waveforms...

Hallo Andy

Try here https://www.exploding-shed.com/

I have now integrated a ladder and state variable filter into my DIY synthesizer Jeannie. In the system menu you can switch the filter type. Audio processor load between 60-70%
...