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When you search for "MIDI sequencer" some threads come up. Maybe there is something similar?

There is software like https://app.cirkitdesigner.com/ https://www.circuito.io/ ... and others maybe that helps?

Shouldn't it be the other way round with ...+= Quarters.pulseOn; and ... += Quarters.pulseOff;

Creative vision from the Teensy. I like that. You could also use ChatGPT to let it explain and analysze the code for you. Possibly it can find the the problem quick if you ask and describe it.

Using a Teensy 4.1 just as a Soundcard to get one microphone signal into a Raspberry Pi looks like overkill to me - especially considering the goal of that great project idea to have a system as cheap as possible. I have no experience with Raspberries, but I am sure there would be other...

About the highpass filter: As long as there is no clipping at any point of the analog stage it is more useful to have a filter implented digitally in software. This way you are far more flexible to choose the exact type of filter with all its parameters.

Is that Teensy really necessary in the setup?

I am curious about the choice of the microphone and the usage: Will you implement a beamformer by delay and sum processing of the four microphones? Is size crucial in this project? Do you expect advantages compared to large microphones with inbuilt directionality?

Great! I think this is a good start and a useful tool. Possibility to share it makes it attractive (besides the mentioned restrictions regarding browsers) Some suggestions for improvements: Button with ability to send midi note (not only cc messages) Button should not send a zero value after...

For similar setups I am using successfully small powerbanks. There are types with around 1000mAh or so which do not turn off when only small power is taken. You get stable 5V from it. 4 freshly and fully loaded NiMH cells could exceed the limit of 5.5V input voltage of the Teensy.

encoder1.write(desiredPosition) is working here.

The SGTL 5000 chip on the audioboard is connected via the mentioned pins to the Teensy. The audioboard itself does not provide anything additional for I2S. See here: https://www.pjrc.com/store/teensy3_audio.html It is possible to use all clock signals in parallel. For DIN and DOUT different...

What exactly is the configuration there? The strip which lights up now, where is it connected to?? To the second ethernet port?? Try to send data to all LEDs and check all 8 outputs. It is possible to use any pin now and to define pins. Maybe there is something strange going on now with the...

5V needs to be cut. GND has to be connected. There exist USB cables with a switch which in my experience do not work because the data lines are missing. I am using a USB hub with power switches for each port to connect Teensy devices with external power and where the trace is not cut. It stays...

It is possible that there is something wrong with the configuration of the Octo library - although I don't see anything. 10 Leds? Your strip looks longer btw the color order just changes the order ... even with the wrong order you would get the single colors - just a different one. Or: there is...

It is possible to connect the ground at the adapter, yes. In large setups, often I find it practical to have the ground connection (from Teensy/adapter to the LED power supply) at the LED strip. There is a ground on the output jack of the Octo adapter for each data line. Edit: this way it is...

If there is only one power supply which powers both the Teensy and the LEDs there is only one ground which has to be connected to all parts. In the case of powering the Teensy from another source (USB, powerbank, another power suplly) it is important that all grounds are connected. It was...

15 analog ins for the faders would be easily managable with one Teensy 4.0 and one multiplexer. Very large numbers for analog ins can become challenging regarding grounding and noise to get clean signals from faders or potentiometers. Another option could be external ADC boards. A higher number...

Have you checked the ground connections? That can also cause such problems, when the ground from the LEDs is not connected to the Teensy / Otco... ground.

Long header pins are possible, e.g.: https://www.sparkfun.com/break-away-headers-long.html 20 mm length is sufficient. I measured it. You can also connect the 8 pins + 5V + GND using wires or on a circuit board. Or design a PCB. In that case you could design the whole adapter...

You can compile the Teensy to act as a USB Keyboard on your PC and send key messages with the keys of your choice such as the CTRL keys. You can find all the details here: https://www.pjrc.com/teensy/td_keyboard.html The connection of a closing button or morse paddle is not a problem using...

Doesn't hurt to get the right cable, yes. But where do you see that the 4pin connector is missing the 5V pin? There are two GND pins in the 5 pin connector where you can omitt one. The 4pin connector should also work.

You can use a breadboard and a few jumper wires to connect the Teensy with your display and anything else you want to try out next. https://learn.sparkfun.com/tutorials/how-to-use-a-breadboard/all

From my limited understanding I would guess: That pattern on the underside acts as the capacitive touch sensor for each potentiometer / encoder. It seems that the housing of the encoders are not connected to ground or anything, right? In this handbook you can find a little bit about "Mutual...

A few more thoughts: You can get the WS2811 as single chips. These one are on the 12V LED strips, where one chip drives 3 RGB LEDs. https://www.adafruit.com/product/1378 I don't know if or how it would be possible to use them with low current LEDs. There are smaller versions than the very...

There are some types of addressable LEDs also in different sizes. Adressing all 128 LEDs via one pin is handy and very quick. Why not use, e.g., 10% of power (or even less)? That is roughly the same as the mentioned 2mA per LED. WS2812 and similiar in all it's available versions should be more...

You could try this: disconnect any USB and other connection to a computer. Use a powerbank to power the teensy. Connect headphones to the headphone output of the audioshield. Change your sketch that the microphone input is routed to the headphone output. This way you can check if the problem is...

Technically both is possible and nothing can be damaged. When the Teensy is powered it starts and then it depends what your program is doing and what connection is needed. If the program is not waiting for a serial connection to be there, and it sends serial data, that data can get lost and is...

Not sure if that sort of debouncing would help for your frequencies?

Yes, 1,8V is fine for that regulator. There exist different packages with different pin assignments. V_DDD has to be between 1.1 and 2.0V according to the datasheet. As far as I see everything looks correct. The 100k resistors at the line in an out are not on the audio board - you probably are...

You could add something like that to your if-statement to detect a new pulse only after your defined time window: if (.... && (micros()-lastTime > 15))

It sounds that it would not be an option to have additional buttons connected to the Teensy to trigger the macros? That would make things easier. Long ago I've worked with AutoIt. It is a script language where you can do many things under Windows. But as far as I remember you can only get...

Why do you need an alternative to AutoHotkey? What is the setup? A Windows PC with a Teensy connected via USB? It could be possible to connect the computer mouse to the Teensy via the USB host port. The Teensy can process the input and decides what exactly is passed through and what...

I remember one thread with a problem where it was solved by using another library: https://forum.pjrc.com/index.php?threads/automated-still-controller-hx711-trouble.73430 ... but it seems you are already using the library which worked there. What forces or masses are you using in your tests?

I am still trying to understand: What kind of noise are we talking of? Is the noise only present during SD-card playback? Or always? Without the class D amp, connecting the line-out of the audioshield to another amplifier, there is no noise problem?

What kind of noise do you hear? Is it noise during playack from SD card? What exactly is meant by "other setups"? Do you have another configuration where there is this noise not audible? What power source are you using? Have you tried (as a test) to use different power sources for Teensy and...

Thanks, BillFM. I was searching the reverence manual and couldn't find it there. https://www.pjrc.com/teensy/IMXRT1060RM_rev3_annotations.pdf

Maybe you could find some information here: https://forum.pjrc.com/index.php?threads/beware-t4x-rtc-power-consumption.64216/ https://forum.pjrc.com/index.php?threads/teensy-4-1-rtc-battery-life-question.75985/ ... but probably not about maximum voltage. There are threads where 3.8V is...

That sounds like an interesting project. Not sure if I understand the idea/question. The setup is: - Teensy with GPS module provides timestamp signal over USB audio - Smartphone (Android?) records video signal from integrated camera together with this audio signal from USB - via software...

To check the hardware you can use a simple sketch without any library, e.g. use the pushbutton pullup example from tutorial 3. If the pins are working you can rule out any problems with your cable connections or the Teensy hardware. From a quick look at the code I couldn't find where...

I don't know these libraries. From my understanding from a quick look the mapping of one pot is done on one analog input. Probably the library needs some adaptation to use it with a mux input where the same analog input pin is used for different potentiometers by switchting through these step by...

One thing is that the order of the pins is not completely controllable as far as I remember. If you have strips connected to ALL those pins for a test this shouldn't matter at that point. You have 10*400 = 4000 LEDs now in this definition which have all to be set to light up. This should be...

Another way would be a simple lowpass: float alpha = 0.2; // choose that you like it // frequency_new = ... map your sensor data frequency = frequency + (alpha * (frequency_new - frequency));

I understood that a gamepad = joystick device to send data to the PC is needed? Not sure how a USB serial device could work here.

I would also ask for the reason why analog signals are used. Connecting the two microcontroller via one serial interface makes it easy to communicate and send data more reliable. If only one direction is needed, only GND and TX to RX would be necessary. Not sure if I understand the application...

4ms attack and 2ms releaseNoteOn seem quite short and quick. Have you tried longer times, e.g. 20ms or so? Are you planning to make the envelope settings a parameter you can change? You could start to control it via MIDI to play around with it.

There is a note in the documentation (you can see that in the GUI designer) about an upper limit of 400Hz and besides more information a link to this thread: https://forum.pjrc.com/index.php?threads/different-range-fft-algorithm.32252/page-2

I understood your post and was reading: 1) powering the Teensy from the buck converter -> noise during SD playback 2) powering the Teensy from Laptop-USB -> no problmes with noise during SD playback which brings up the question if the buck converter (or maybe the wiring / grounding with it)...

Have you compared to a potentiometer, 10k or so (connected to ground and 3.3V, middle pin to analog in), to check if the code is fine? Then you could compare and check if the wiring of the board you are is the way it should be.

Could the noise come from the buck converter? Have you tried a 5V powerbank for the Teensy just for comparison?