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@NuttyMonk: I have absolutely no experience with programming the specific timer + interrupt hardware in the Teensy, so I'm hoping that maybe my ignorance could work in our favor here. With that...

@SteveSFX:

No...you are close to being in the same neighborhood, however, it seems that you are still missing the detailed understanding of a very important aspect in your declaration . . . take...

@SteveSFX:

Google is your friend !! The answer is quickly found by searching for "arduino SD card variable filename" . . .

Just remember to make your array big enough to hold the *longest*...

@tedm:

Welcome to the Teensy world. You have chosen an excellent platform to potentially base your project upon. I'd suggest you take a look at the Audio Adapter Boards at this <link> (don't be...

@EcodroneSRL:

The thread at this <link> might have some useful info.

Good luck & have fun !!

Mark J Culross
KD5RXT

@SteveSFX: I would guess that those are examples of the required settings & syntax for graphics driver chips that most likely have absolutely nothing to do with your 240x240, since it would appear...

@hbtousa: Unless you are reading a physical potentiometer, you should not need to consume an analog input pin for volume control. You just need your touchscreen volume control (implemented as a...

I usually either order my T4.x with pins or solder on my own. Using this, I also solder socket headers to the Audio Board. This arrangement allows me to stack the T4.x on top of the Audio Board,...

You didn't say which Teensy (T3x or T4x) and/or which Audio Shield (Rev C or Rev D) that you are using. Check this <link> for info on which pins your Audio Shield is using (very likely an overlap on...

The standard data rate for MIDI over serial is 31250 bps, which limits the maximum transfer that can be expected. With one start bit + 8 data bits + 1 stop bit per MIDI message byte, you can expect...

@Roy86: Do you see the same overheating issues if you run any of the Audio Shield examples ?? This may help narrow down whether it might be a hardware vs software cause . . .

Mark J Culross...

@Pkore:

Nothing in the example that I gave is absolutely required. I simply intended to give you some possibilities to play with (my best guess as to what you were looking for).

More details:...

@XForce: very nice !!

Mark J Culross
KD5RXT

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Programmable WS2812B LED strip controller

@Pkore: Welcome to using Teensy's fantastic audio library !! I'll take a best guess at what you are trying to accomplish. Import the following into the design tool (NOTE: in the future, when...

In the original code (from tsan) that you were using as your example, a float value was being stored in the "data[]" array, and the (float) members of that array were being translated into 4-byte...

@mmajors: You are very welcome. Glad you got it figured out (& glad that I could help in a small way) !!

Mark J Culross
KD5RXT

Double-check to make sure that you don't have Arduino installed in two different locations. From what you describe, it sounds like you do, & the one with TeensyDuino knowledge is the one that runs...

Installed TD1.57b1 over TD1.56 (without uninstalling). Building with Arduino 1.8.19 under the following conditions:


Arduino IDE Configuration (last built with Arduino 1.8.19 + Teensyduino...

Richard:

I took another look at my TeensyMIDIPolySynth source & realized that there is one additional difference in my implementation of the USBHost interface that might be pertinent. Because I...

@Rolfdegen (or anyone else who has already succeeded in adding an oscilloscope display to your TFT project display):

I would like to add an oscilloscope display of the (digital) audio stream...

@rvh: Regarding your earlier question on the use/need for calling myUSB.Task(), the USBhost source shows:


/**
* \brief USB main task, responsible for enumeration and clean up stage.
*
*...

Wow, how did I miss that ?? Don't I feel a little foolish right now !! Thanks for the quick reply, Paul. For my more complex projects (like this one), I always include a "pin usage" diagram in the...

BACKGROUND: I have continued to expand my TeensyMIDIPolySynth project & am very pleased with how it keeps progressing. The current version uses a T4.1 + Audio Adapter Board + RA8875 display. All...

@InvalidSyntax(2):

In my project, I was using the Audio Adapter, which has the headphone jack right on the board. Sorry, I don't have any experience with making use of signals directly from DACs....

Sorry, I overlooked the fact that you are using the Teensy LC, which, as Paul pointed out, does not have the required USBhost port. Sorry that I did not really answer your question completely and/or...

@syusaku sano:

Using my best guess from your pictures and your description, I am guessing that the connection between the PC and the Line6 pocketPOD is via USB. If that is the case, you will need...

@InvalidSyntax:

I can't speak specifically to mixing USB audio with waveforms, but I can tell you that in my TeensyMIDIPolySynth project (which used physical pots read thru analog pin inputs to...

@luni:

Nice !!

Would it be better to move the calling of "Serial.println("triggered <--------------");" down into loop(), where the "start" condition is detected, rather than having it called...

donperryjm: FYI: mediafire is not happy with something about the way you tried to share the file(s):

28122

Not 100% sure, but I'd bet that tutorial is for the older AVR-based Teensies & isn't appropriate for the Teensy 4.0. Take a look at <this> thread & see if it will get you where you're wanting to go...

Being in the US, not sure if either Adafruit or SparkFun are available for you in the UK. If the 74HC595 will work for your application, Adafruit sells the individual ICs (3-pack) & SparkFun sells a...

@BriComp probably meant "full code" rather than "dull code" !!

Mark J Culross
KD5RXT

Q1 (with Q2): with two channels, each with gain set to 1, the output audio will be a combo of the two inputs without any attenuation or amplification?
A1 (with A2): Yes. Note that, if the two...

You beat me to the punch . . . sorry to come late to the party, but happy that I'm at least walking a similar path !!

So, how about if, in addition to the interrupt at zero crossing which manages...

@SoulReaver:

Whoops, I should have paid more attention to the fact that you are using a T3.2 . . . you are entirely correct that it has 5V-tolerant pins. Mea Culpa !! (I'd use the excuse that I...

I have not messed with either a zero-crossing circuit or with dimmers (since the long-ago TRIAC choppers . . . I'm showing my age !!), but could you use the following:

- globally define &...

@SoulReaver: Looking at the wiring setup image from your OP, I would check the output signal level from the IR receiver (using an o-scope, not a meter...your meter will not give you the peak value,...

Stick with it, you're very, very close to accomplishing your intent !! My compliments on your work & your persistence !!

Try making the simple changes flagged below in RED & see if that makes a...

@NotSo:

Let's see if I understand your intent correctly:

I) detect a sound & determine its frequency
II) send a MIDI NoteOn for the note/frequency detected
III) if/when the sound goes away,...

Maybe you just made a simple typo, but I would not expect any well-designed device that is intended to provide USB power to be putting out anywhere near 6VDC. Prior to USB 2.0, the USB spec defined...

@ralphhipps: For clarity, the "# key" that BriComp refers to is the "#" button located above the editor area (not the "#" key on the keyboard). You can use one of the following ways to make use of...

In the Arduino IDE, click on File > Examples > Examples for Teensy 4.1 > USBHost_t36 > (any of the listed examples, for example USBHost_viewer). These will show examples of how to make use of the...

@artUdino (Bertram):

Good to hear that you are making great progress.

[ Again, these suggestions are extemporaneous, as I have not actually tested the code provided below, so take due care once...

I've not used threads, so I may be missing something simple. Try removing and/or commenting out the RED line above & see what happens . . .

Mark J Culross
KD5RXT

@Praxis: Can you post a picture of your setup & wiring ?? Could you possibly have the RX & TX pins misconnected/swapped ?? Try swapping those two pins for a quick test . . . without seeing your...

@artUdino:

When I was active as an Assistant Scoutmaster in our local Boy Scout Troop, I used to tell the Scouts: "There are no stupid questions. If you are thinking of asking the question, there...

@artUdino:

[ Please note that I am typing this without actually testing/running it on a Teensy, as I am not where I can actually do any testing (in fact, being lazy, I have not even tried to...

@RobTec:
When using the "hold the button for 15 seconds to reset", you should not unplug the Teensy until the solid red LED extinguishes & the orange LED starts blinking. As long as the red LED is...