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If the requirements are exactly that, 20kSPS, -30dB at 10kHz, then it does not need to have a brickwall filter. Note, no requirements for the passband quality, so even a RC filter with suitable values would do... a...

Awesome - thank you both! That saved me a whole bunch of labour and also gave me some interesting insights into how the library works.

It's interesting how something like this is so vastly superior. Plus no ground loops when using toslink. https://www.audiosciencereview.com/forum/index.php?threads/topping-e30-dac-review.12119/

Sorta...I got a novation sl61 mkiii and it actually can send buttons as midi controllers and you can set them up to increment +/-. Not a perfect solution. It takes a pair of buttons for a function, for example...and the...

If you don't have specific requirements, forum members can't offer informed advice. I suggest to start with the ADC built into any of the Teensies and determine whether that is satisfactory. If you sample at a...

Since the DAC chip (PCM5102A) cannot be easily soldered, we considered using a ready-made converter board (3-6 euros) and plugging it onto the mainboard from behind. This eliminates the difficult soldering of the...

Hello dear Synthi friends .. We have now checked our "Jeannie" and everything works flawlessly. Andre listened a little more closely with his trained ears and noticed distortions in the sound. Measurements...

Awesome, thank you so much. That worked :)

That would be great! As you may have noticed I did a port of DaisySP to the Teensy Audio library. I'll keep flogging away at it.

It would be possible to change used pins to use the lib? Wire.setSCL(24); Wire.setSDA(25);

I've been following Joel's excellent work for quite a while now. I'm no expert, but am pretty sure this is state of the art for monophonic, time domain pitch detection. The implemenation in the q library at the...

Cool, I hadn't heard of that FASTRUN thing before. I had been using either a while(1) or an assembly jump instruction to get a quick consistent loop. Just in case its useful to anyone, here's a short bit-duration...

Ok, bought/arrived the thing(4.1+Ethernet piggyback), following this:https://www.codeproject.com/Articles/1001891/A-U Any help still appreciated.

After update teensyduino bug is not reproduced. Later I have been some issues with TeensyThread, but I solved my task without extra threads ...

Yes, it's mentioned also in the norm that I do need an aliasing filter of half the sampling frequency. But in fact, I don't have any idea about how to choose a good Filter, nor a good ADC.

Thank you luni, the terminal works!, I have to click on Tycommander Serial button and also at the Serial label and appeared

On my side, I had to remove the audio noise generators to get it fixed... But I beleive the problem is solved now ? (haven't tried the fix yet)

Thanks a lot for your quick answer, what a stupid error of mine ! (I actually made a custom document out of teensy connections card fort my pinouts, which was hidding analog infos...) I should have asked before... ...

You need to have at least one non-USB input or output object. USB can't cause the audio library to update. Just add an I2S input or output, even if it's unused. This detail is documented in the "Notes" on the...

No but you can use it to program another one: https://forum.pjrc.com/threads/54318-Use-a-pre-compile-program-on-Tennsy-3-6?p=191141#post191141 And it's work (test on teensy 3.6)...

You need to have #include "effect_platervbstereo.h" Before the #include "audioGui.h" As an alternative you will need to have the #include "effect_platervbstereo.h" In the top of audioGui.h To add items to the...

Do you have any idea how to solve this problem yet?

Ahh, you mean IMXRT10xx, that makes more sense. Concerning Bootloader chip, history showed that Paul is only supporting (hard coded) MCU chips he is using for Teensies. Different models of the same family are not...

Hi Group, Just a quick update on this. The teensy->host audio path now supports AUDIO_BLOCK_SAMPLES of 32 and 16 via a ring of buffers. Also, the number of samples sent to the host will fluctuate to keep the buffers...

A quick search on dsb - like done to find the syntax - might yield more details ... here's a distilled recall from better notes posted elsewhere ... Makes sure the handled interrupt indication propagates as handled...

The documents and libraries show the ability to hook up to SPI. Example: https://forum.arduino.cc/t/adxl345-wiring-issue-on-spi/257756 Or page 15 of their PDF:...

@All - I have been working on an upper level IF to @Kurte's and @mjs513's hard work on UsbMscFat. I wanted to: 1) Find and initialize all available Mass Storage devices connected to the Teensy. 2) Create an index...

I think I found a solution. From RadioHead's online documentation: "The RH_RF69 driver uses interrupts to react to events in the RF69 module, such as the reception of a new packet, or the completion of transmission...

what does asm("dsb":::"memory"); do?

Looking at this now Paul. Thanks for your time and replies.

Maybe lame anti-virus software is interfering?

I do not think so. I had both boards connected to a powered USB hub. Everything else on that hub works fine. 8-Dale

I just downloaded and ran the latest Teensyduino from the site with no problems at all. Ran and executed as expected. Now I'm really confused as to why the MotionCal link works for everyone else, given that I am able to...

Indeed - when an _isr() takes too long it effectively never exits before re-entering and loop() never gets cycles. Without sketch code, there is nothing else running in CORE code that would block loop(). Perhaps...

The circled link is what I am clicking. I get no error messages at all. Nothing happens. This is also the case for the Linux and Mac links as well. I'm sure this is on my end but I have no clue why. I am able to...

I think that, in theory, on teensy 4.1 both the QSPI port (used for the extra PSRAM normally) and FlexIO port(s) could be set up for generic 4-lane SPI ("quad-SPI" or something). Considering that I read somewhere about...

Thank you guys. I get no error message at all, just nothing happens when I click the link. Going to try again.

Print in ISR only for testing if the program comes to this place, only one character with highes baudrate possible. ISR every 100usec not longer than 10 -20 usec max! Never delay() in ISR.

Do you have more longer things in all your ISRs ?

perfect, thanks, exactly the info I was looking for! will try and report back and eventually place a PR after testing!

I am not satisfied with the PT8211. It sounds bad in my DIY synthesizer. Because of this, I want to use a different DAC. The PCM5102A sounds very good and works very well with Teensy 4.1. Link:...

I made another measurement with PCM5201A and 44.1KHz in my Teensy 4.1 . It's a good result.

@DD4WH, If you wanted to use I2S and also use LED for messaging, You should use CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // PTC5, I2S0_RXD0 after you are done with LEDing and move on to I2S

A friend made this measurement with PT8211

I also measured at 44.1KHz and found no harmonic distortion with PCM5102A and ES9023P. Only harmonic distortion with PT8211. Increasing the sample rate to 88.2KHz with the PT8211 was no improvement.

Interesting to see, but a bit of apples to oranges. We expect different results when measured at double sampling frequency. Doesn't really show that they are better at the same sampling frequency.

I clicked the link and it downloaded the program. Please try again. If it's still not working, maybe give us a screenshot so we can specifically what you're clicking and the exact "not working" error message. ...

This link from the prop shield page worked for me. Pete

This is the one "F-RAM™" ( F-RAM is a Cypress TM ) :: $13.20 1Mbit >> cypress-semiconductor-corp/FM25V10-G Another part that works is this $4.41 MRAM 1Mbit >> rohm-semiconductor/MR45V100AMAZAATL : Both of those...

Perhaps looking at how the on board SD Card operates on T3.5 & T3.6 could shed some light on what is required to implement that.

Four data lines, one SPI port. 1xSKC, 1xMOSI, 1xCS, 4xMISO and 4x slave devices.

Could you clarify the 4x SPI bit? are you talking 4 seperate SPI ports -OR- were you thinking about an SPI port with 4 data lanes?

Aha. Change square.begin(WAVEFORM_SQUARE); to square.begin(WAVEFORM_PULSE); which also generates +1 and -1 and therefore needs shaping. But then you can use pulseWidth to get whatever duty cycle is appropriate. ...

UART I\O IS an option. What's available? Both the units you listed require I2C. The ADCL343 clearly shows I2C. The BNO080 requires it to setup the SPI:) I had the idea of setting up an interrupt on the SPI clock so...

Sorry, I misread your EDIT comment. The output of the square waveform does not alternate between zero and one. It is +1 or -1. All that does to your signal is periodically invert it. One way to handle this is to use...

is it possible the voltage at the usb is unstable? are you powering from VIN? There used to be old Alpha power supplies that would fry computer parts.. 😆

good idea. I tried commenting out all the print statements in the timer but it still freezes

Testing with the following modification at the moment (this is expected to do a restart of the Teensy every time the SD card cannot be initiated): #define CPU_RESTART_ADDR (uint32_t *)0xE000ED0C #define...

Warning I have not used many of the accelerometers, although I do have a few of them sitting around here somewhere... My desk and office areas organization is not as it should be. But for example Adafruit and...

Thanks, but the point is actually that I only use one DAC, not two. So I tried to let the teensy multiply a square wave and a sine wave, such that I get a sine wave that turns on/off. So then the multiplied signal...

To use both DACs on the T3.6 you need to use AudioOutputAnalogStereo AudioOutputAnalogStereo dacs; and then in the connections reference port 0 (left) and port 1 (right) AudioConnection ...

Interrupts do happen, that's the point with IntervalTimers, not sure why they cannot be used. The interval trigger every x seconds and sends a NoteOn to an envelop, or sets a mixer amplitude. Another option is to...

I would like to know what happened too. OK, great. 8-Dale

I did not power the boards before soldering pins to them. From now on, I will. This is the first problem I have had that I could not trace to something I did. I was able to load Circuitpython and Arduino on board #1...

Serial printing in the 100us Timer Interrupt will block the loop. Put your data in a buffer(volatile) and give a flag to loop for printing the buffer. OpaLothar

I only have what I have already posted - pictures taken with my phone. 8-Dale

I would think you'd want to load the POE with the resistor, but something isn't right. I know Wikipedia isn't exactly the best for accurate information, but here's what the POE page says: "To retain power, the PD...

Memory allocators are allowed to break the rules as the objects are not "live" when they are in freelists (one hopes!) In a full-blown garbage collector you normally have to completely subvert any type system anyway as...

The analog pins for the T4.1 are 14--27 and 38-41 according to the info card with the pinouts. You are using pin 11 which is digital only.

Problem solved for this display on a Teensy4, works perfect. I made a mistake to let the display run on 5V instead of 3.3V. Best, Johan

I have also been modifying the TSynth code and saw this problem at one point. I'll share some details in case it gives you any additional clues. When using a std::vector collection of pointers I experienced the...

Sounds like hardware failure. I really want to figure out what happened here. I've asked Robin to contact you next week.