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Thank you KurtE.

You are right, I ment TFT_MISO.

I am using your ILI9341_t3n lib (nice job there).

Hi.
I have a ILI9341 module connected to a Teensy 4.1. I have followed the instructions here. But, as I am not using neither the touch capability nor the SD card of the module, I have thought I...

Nice, BriComp. It is very interesting viewing it that way. I hadn't realized the progression in the T4 was perfectly linear.

Thank you defragster, I missed that link to the sketch. In case anyone is interested, I have run the CoreMark sketch on the Teensy 4.0 and the Teensy 3.6 at different speeds and these are the...

Wow, it looks that stepping down to 528 MHz would considerably increase the its lifespan. That joined to the lower power consumption makes me consider stepping down to 528 MHz. How remarkable would...

Thank you for the insights Paul. Unfortunately, I have just tried it and did not work.


Raw SerialFlash Hardware Test


Read Chip Identification:

JEDEC ID: EF 40 19

True. I didn't realized it has an F instead a J, that is what the chip is supposed to be.

Hi, all.

I have finally been able to get my breakout board and test it.

22716

Unfortunately it failed the RawHardwareTest of the SerialFlash lib. I ran it several times, always after the...

Looks interesting. I will have a look at it.

In fact I have followed that thread, as it is a very interesting project, but I might have missed that, or I read it in the past but I didn't remember...

Hi, Sandwich.

Indeed I am using the adcHighPassFilterDisable method in my current project. The reason it is not present in the sketch I posted is because I tried to reduce the code as much as I...

Thank you for your reply Rob.
I think what you are refering to is gain values for sounds playing simultaneously. In this case what I am changing is the global volume, so there is no sum in gains.

Thank you for your response, defragster.

I think I should have added in my previous post that my intention is to use the flash chip for playing audio files. And AFAIK the Audio library does not...

Hi, guys.

I want to use a W25Q256 SOIC16 flash ship with the Teensy 4.1 and I thought I could try making a breakout. The idea is similar to the one of this post, but in my case, with the Teensy...

Hi MarkT, thank you for your insights. Not sure how to check if is getting all zeroes, I'll have to check it.

I thought about creating my own audio circuit in a PCB, but frankly I wouldn't know...

No, I am not talking to the display. In fact I have tested this simple sketch that is doing nothing with the display really, and the sound is present.



#define VOL_HEADPHONES_PIN A3
...

I was working in an audio project in Teensy 3.6 with the Audio Board and I decided to migrate it to Teensy 4.1 and the rev. D Audio Board.
I don't know if it may be relevant, but I soldered a PSRAM...

I would recommend you to get an audio board (make sure you get rev C, as rev D is for Teensy 4.x).

This board makes it easier to use the audio inputs and outputs and offers higher audio quality...

I ordered a couple of them from Pimoroni, in the UK:
https://shop.pimoroni.com/products/8mb-psram-chip-for-teensy-4-1

@mjs513 Fantastic explanation. I'll have a look at the datasheet.

Thanks again.

Well, after downloading I ran successfully the tests for the PSRAM. Then I tried the following test for the Flash chip:...

I see. I will try with that branch then.

Than you very much for such comprehensive clarifications.

I case it helps, I happened to solder the PSRAM to my Teensy 4.1 last weekend, both ordered from Pimoroni too. And the result of the test was positive. Of course, there could be a problem with that...

Thank you both for your replies. Have been very helpful.

I think I used the latest versions of the libraries. I just downloaded the zip from https://github.com/PaulStoffregen/teensy41_extram and...

Hi, guys.

I have been trying to migrate a project from T 3.6 to T 4.1. In my T 3.6 project I have a Winbond 25Q128FVSG flash chip soldered in the audio board and I decided to upgrade to the new...

It's still in development, as currently I can only work on it on weekeds. I still have to implement all the MIDI and continue working on the sequencer, sampler, sound editing and UI functionalities....

Thank you Paul, well to know. Currently I am using a Winbond 25Q128FVSG, so I might try the new ones.

I am using a W25Q128 soldered to the Audio Board with my Teensy 3.6. As the erase() and write() tasks are very slow, I was thinking if the Teensy 4 helps at all in that matter. I think that the low...

I was just looking for something similar. But I was considering using a SOIC-16 breakout with a bigger chip with more memory.

The basis of time stretching is easy, but implementing it in a way that sounds "good" is not that easy.

Time stretching is based on the repetition of little pieces (grains). This way you "stretch"...

I think the easiest way to connect an SD card in Teensy 4 would be with a breakout that has a FFC 8 pin connector
17628

Is there a breakout like this available anywhere?

Another think I am...

Hi. I haven't done further research on this as I have switched to Frank B's suggested AdioTiming library as method to change sample rate.
I can't remember now if I realiced about what you comment on...

Interesting. It seems that shipping overseas is just $3. Is there any difference with the original version, apart from the color?

Yes. That is the most likely explanation. Those tiny chips are tricky to solder properly. At least for me.

You need this library: https://github.com/PaulStoffregen/SerialFlash

It has an example sketch to test the hardware. If you run it succesfuly, you can run the sketch to copy files from a SD card....

Hi, I had an ILI9341 display and it worked properly, aside from two lines of "dead pixels" that were there from the beginning.

I have just bought 4 new displays on eBay:...

I am using it indeed. But sometimes I am missing information. What I am not sure of is where/why is that data being missed. I don't know if storing the queue data in a bigger buffer would help.


...

I've experimented this issue too. I was planing to adapt the recoding example sketch including a bigger buffer. Are there any other best practices with the audio library in order to obtain reliable...

Hi. In my project I am using Teensy 3.6 with the audio board. I would like to record audio and store it in the audio board's SD card choosing the name of the new file after finishing the recording....

Thank you, rcarr, it worked.
I was confused about the mapping of the pins for the Bounce objects, as all buttons share the same pin. But creating 8 different objects routed to the same pin and...

Hi. In my project I have currently 8 tact switches connected directly to my Teensy 3.6 and I am using the Bouce library and its fallingEdge() method for a quick response of the buttons being pressed....

Could you tell me where in the library is the feature? please. I have searched it and I can't find it.

Hi. I have been investigating about the sampling rate in the audio board and I found the following info in the data sheet about the options of the CHIP_CLK_CTRL:

RATE_MODE: Sets the sample rate...

Thank you all for your replies and advice. They are very helpful.

I have been reading the datasheet and it doesn't seem to be any easy way to disable the anti-aliasing filter, but I'll continue...

Sorry. You are right, I should have been more specific in my question.

The purpose is to replicate (to a certain extent) the sound of old sampling machines. For example, the SP 1200 (in my...

Hi.
I would like to know if it is possible to adjust the following parameters in the audio board in order to record lo-fi audio:
1 - Decrease sampling rate.
2 - Decrease bit depth.
3 - Disable...

Hi, I am trying to establish all the components that I will need for my new project: https://forum.pjrc.com/threads/54862-MIDI-Sequencer-Sampler

And after a lot of reading and searching I have...

Thank you for your advice Pensive.

I think that is exactly what I would do: break it up into small chunks and learn in every step what is needed. As you say, the Agile philosophy based on sprints...

Hi, I'm new in this field and I have a project in mind that is probably beyond a beginner reach, but I am willing to learn and build it step by step.
I have a background in programming, but I'm a...