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https://codeberg.org/dcoredump/MicroDexed

This is a 6-OP-FM synth for the Teensy, compatible with a famous japanese synth from the 80's ;-)

Thanks, it works fine with my patched Adapter:

22394

More questions:
- Do I need this resistor also for Rev C boards? is it problematic if the resistor is also used for Rev C?
- Can/should I...

Thanks, Paul. So I will try to add one to my adapter board.

Hi,

I made an adapter board for using a T_4.1 as a replacement for the T_3.6 on my TMA boards. This adapter maps the used pins to new destinations - especially the I2S pins.

Everything works...

TeensyMIDIAudio is currently nothing more than a breakout board with no intelligence, so I think this is not a big deal.

It should be possible to adapt this to the TeensyMIDIAudio board as soon as there are the T_4.1 adapter kits ready.

Regards, Holger

Hi ETMoody3,



Try to change the "Velocity Level" (page 18 in the manual). The "original" sound is when using the value "100".



There are several more SYSEX sound files flying around on...

Sorry that there is no video demo yet. I had once run a MIDI file through the MicroDexed and the MicroMDAEPiano on soundcloud (Drums from RZ-Drummer), no additional external mastering or FX).
...

Hi @ETMoody3,



Ahhh, nice case!!! Thanks for showing!

Regards, Holger

Hmmm, strange. I created a new version with slightly changed paramters for the drill file. As I wrote: it worked with Rev-1.8 at PCBWAY and REv-1.8 at PCBGO. You can try to use the new files from...

Nice! Thanks for testing.

Regards, Holger

I havn't tested the code with T_4.x. Have you compiled with "Serial + MIDI + Audio"?

Can you tell me which example code you used?

I can take a look at this when I am back at home (next week). I made those PCBs at PCBGO a year ago, so I think everything should be fine.

Regards, Holger

Hi Mark,

that's really cool! But I can't try because I currently have no T_4.x setup running. Using it on MicroDexed (on a T_3.6) would be probably reduce the polyphony to 1. I hope I can get my...

Hi Mark,

Thanks for investigating this problem. The pictures say a lot. Can you give me an information where I can read how to use sinc()-method for this? This approach is exciting.



I used...

Thanks for sharing! I made something similar nearly a year ago. I needed a chorus effect, so I wrote my own modulated delay line.

Input 0 is the original signal, Input 1 it the modulation signal...

Ok, thanks! I think I have to try also until finding working setup. Yes, there is also much memory used outside the audio stack. But this memory is mainly staticly allocated. I think I have to try...

Hi Paul,

thanks for your answer!



Ok - good to know. My current problem: I am getting strange sounds when using higher values with the delay. And after reducing the delay time the problems...

Hi!

I have a questions about the memory consumption of the delay object:

if I use only one tap with delay1.delay(); and use a relatively high value as delay time and then set it lower, will...

Hi Paul,



Thanks for the link to the different compression variants. Looks interesting. Perhaps this can help to write such an effect. I scanned the forum for already existing code and found...

Hi Richard,



That sounds very interesting. I'd like to try that. I have already built some "effects" in the design of the audio library (chorus, mono-stereo-panning, stereo-mono). Would you...

I have found out that I am probably beoeating a compressor in some way. It's a pity that there is no finished object in the audio library for this yet.

Thanks, Holger

Hi @ll,

I have the problem that my audio code currently produces a low-level signal. Yes: I can try to multiply the signal before sending out. But how about the lineOutLevel()-method for the...

Ok, I solved my problem: The changed buffer sizes seemed to be ok, but I used the wrong program for uploading the data. If I use


amidi -p hw:2,0,0 -s addon/SD/90/RitCh1.syx

it seems to work....

Hi!

I am writing some MIDI SYSEX code for https://www.parasitstudio.de/projects/microdexed/ and tried to implement a MIDI bank upload. Such a DX7 bank consists of 32 voices and together a SYSEX...

Many thanks! I will take a close look at the schematics and start to build my own when I have restored my KiCAD environment.

Regards, Holger

Yes, I have a TGA Pro and I have some adapter boards. They are working for the TGA but not for my project because I need some more routed pins for the encoders which your board doen't have. I think I...

Ok, thanks for this information. Hmmmm, my PCB is designed for using the Rev C boards, so the only way seems to build an adapter (and hope that I won't get those signaling problems).

Thanks, Holger

Ok, it seems to be pin compatible to the T_4.0 (for the pins which match the footprint).

Thanks, Holger

Thanks @Paul (fixed minutes before 1.52 :))

Hi!

FYI:

I tried 1.52#6 on Linux (Kubuntu 20.04) and Arduino-1.8.12: Installation ok.

When I am trying to install my MicroDexed-project (which uses USBHost_t36.h) for Teensy-4.1, I am...

Hi @ll,

I got the new T_4.1 and tried an inline replacement inside for my MicroDeded. I am using the Rev B/C audio shields from Teensy. It seems that T_4.1 is not compatible with them. Can anyone...

Ahhhh! I thought I am getting a pin number when using BUILTIN_SDCARD and havn't checked this before. Many thanks!!!!

Regards, Holger

Hello,

I have a little problem with my T_3.6 + audio-shield: I want to check if a sd-card is placed into the T_3.6 and, if not, than try to check if there is one installed on the audio-shield. But...

We changed the handling of the audio queue, so this is perhaps not necessary anymore.



I currently have no T_4.0 running. I fact I got some T_4.0 yesterday, but I havn't time to test -p erhaps...

Many thanks!!! This is a very cool testing tool and it works with wine on Linux and MicroDexed connected via USB! :-)

Is there a way to change the controller numbers of the pots?

Regards, Holger

Thanks for showing! The "dev" branch supports already T_4.0. But it will take some time to finish all the changes for the new version (including dual/split mode for the T_4.0).

Regards, Holger

Great! 64 note are 4 times a DX7 :-)
Currently I am writing the code for multi instances, so when it's ready it may be possible to run 4 different voices at a time :-)



Currently I have some...

Hey, that's pretty cool! Thanks for testing.

The noise can be buffer underrun or (what I think) overload (too loud). This is shown as XRUN or PEAK counter every 5 seconds on the serial console....

Thanks @tele_player for sharing! Can you try to increase MAX_NOTES to 32 or more (inside config.h)? I am curious about how many notes can be played with the T_4.0 simultaniously.

Currently there...

I just forgot to mention: The code is using CMSIS (arm_q15_to_float()) for getting the modulator factor as a float. IMHO this will only work with T_3.5/T_3.6/T_4.0. I think I have to convert this to...

Thanks for testing! I will try to add more taps and optimize a little bit the code. Because it fits into the Teensy audio stack you can try to add filters behind the modulated signal or use any...

Hi @ll,

after reading, testing and changing much of my code I am proud to say that I have a running modulated delay effect ;)

The current code with a simple example is located at...

Hey, that's pretty cool!!!

As a solution for the block = receiveWritable(0); you have to add your 3 signals to the original signal, perhaps like this:


int16_t *bp;
...
block =...

I think I have fixed my code (have to test it the next days) so my crackling noise in the background is away...



1.) I am also not an audio-programming-professional, so your solution might be a...

Thanks for answering! I took a look into your code and have some (stupid?) questions:

1.) Why do you use a zeroblock? Wouldn't it be easier to use memset() to fill the block with zeros?
2.) Why...

The code is currently designed for the TeensyMIDIAudio breakout board and is still a work in progress (I'm just desperate at programming a chorus effect). It should work without a display but...

Hi all,

after weeks of testing I have no idea anymore for getting my modulated_delay working without aliases and I hope someone of the audio-pro's can help.

First of all: My code is located at...

Hi Sandro,



I am using samples stored in PROGMEM with a Teensy-3.6. Fortunately, samples and program fit into PROGMEM (using 94%). My code is located at...

Ah, ok - I understand...

Yes, keeping an array for notes, piezos, velocity should be a solution... like:



...
int notes[] = { 29, 42, 30 , 33 };
int piezos[] = { A0 ,A1 ,A2, A5};
int...