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    That black plastic on the headers is usually...

    That black plastic on the headers is usually 2.5-3mm high. And that is too close. Why don't you set a height of 4-5mm between the boards?

    Paul
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    Closely related thread...

    Closely related thread.

    Paul
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    Hi Ewan, is there enough spacing between Teensy 4...

    Hi Ewan, is there enough spacing between Teensy 4 and Audio shield? Perhaps the SDcard connector shorts to bottom components of the T4.
    And do you have the orientation of T4 and shield correct?
    ...
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    Yeah, I guess the TDA1543A just assumes 24-bit...

    Yeah, I guess the TDA1543A just assumes 24-bit right-justified 2's-complement data [some EIAJ format] and simply discards the first 8 bits [and whatever comes after the following 16 bits]

    ...
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    Thinking about it a bit longer, I think what the...

    Thinking about it a bit longer, I think what the TDA1543A needs is a right-justified I2S signal. So the edge of the LRCK [aka WS] signals the end of the incoming left or right data.
    That data can be...
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    From the datasheet of the Sony CXD2500BQ [CD...

    From the datasheet of the Sony CXD2500BQ [CD Digital Signal Processor] that was used in Marantz CD players and could drive a TDA1543A directly:

    25282

    The chip outputs data at 48*LRCK rate [2.12...
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    From the www.diyaudio.com forum, message #2 and...

    From the www.diyaudio.com forum, message #2 and #3 seem to support that dummy cycle theory.

    Paul
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    Hallo Frank, Thanks. Tested your code and the...

    Hallo Frank,

    Thanks. Tested your code and the sine looks fine on the oscilloscope.
    Hooked up the logic analyzer and saw this:

    25279

    So apparently the TDA1543A needs japanese...
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    // TDA1543A Teensy 3.2 // 8 Vdd ...

    // TDA1543A Teensy 3.2
    // 8 Vdd 5V 10uF + 100nF to GND
    // 4 GND GND
    // 2 WS 23 LRCK 176.4 KHz
    // 3 DATA 22
    // 1 BCK 9 ...
  10. This 2.54mm is not the height of the plastic...

    This 2.54mm is not the height of the plastic insulator but the pitch between the pins.
    The height of the SDcard connector is ~1.7mm, the height of C29 and L3 is ~0.9mm, so you need at least 3mm...
  11. Most probably the SDcard connector on the...

    Most probably the SDcard connector on the AudioShield touches one of the SMD components on the backside of the Teensy 4.0 [C20/C9/C17/C29/L3].

    Paul
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    I think the program button on the Teensy 4.1 from...

    I think the program button on the Teensy 4.1 from Copperhill is unintentionally missing.
    The pictures on Copperhill's product page show the button.

    25242

    Paul
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    You mean Pazi's code? No, I did not try it. I...

    You mean Pazi's code? No, I did not try it. I believe Pazi's when he says that it works.
    I would not be surprised that the DMA engine and specific registers are different between a Teensy 3.x and a...
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    That's what I thought as well until I found out...

    That's what I thought as well until I found out that the RX2/TX2 pins are not exposed on this module.

    Paul
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    Eddie Van Halen's Eruption is quite a target :)...

    Eddie Van Halen's Eruption is quite a target :)
    Thanks, I will send you an email for your postal address.

    Gruesse,
    Paul
  16. Here it is: #include ...

    Here it is:

    #include <Audio.h>

    AudioSynthWaveformSine sine1;
    AudioOutputI2S i2s1;
    AudioConnection patchCord1(sine1, 0, i2s1, 0);
    AudioConnection ...
  17. Thanks Tonton81. To be honest I'm a bit...

    Thanks Tonton81.
    To be honest I'm a bit surprised that 'just' changing an optimization setting could lead to a (linker?) error.
    Since I'm not that proficient in coding how could I get this...
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    Well, finally received the TDA1543A's today. ...

    Well, finally received the TDA1543A's today.
    Replaced the TDA1543 from the setup pictured above with a fresh TDA1543A and uploaded a simple sketch that works with a PT8211 [I verified it]:

    //...
  19. Hi Bruce, would you mind to elaborate on your...

    Hi Bruce, would you mind to elaborate on your fix?
    I just ran into the same "collect2.exe: error: ld returned 1 exit status" issue when I tried to compile a Teensy LC sketch using the Optimize:...
  20. Thread: Rdm dmx

    by PaulS
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    Here is some info on RDM using TeensyDMX:...

    Here is some info on RDM using TeensyDMX: https://forum.pjrc.com/threads/54660-Teensy-DMX-RDM
    Or perhaps this library? With this additional info.

    Paul
  21. Thread: Rdm dmx

    by PaulS
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    TeensyDMX...

    TeensyDMX.

    Paul
  22. Thanks Frank! No need to feel to sorry for me......

    Thanks Frank! No need to feel to sorry for me...

    Paul
  23. Couldn't resist and was already comparing...

    Couldn't resist and was already comparing C:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3\usb_audio.cpp and C:\Program Files...
  24. Good find! I verified on a Teensy 4.0 as well and...

    Good find! I verified on a Teensy 4.0 as well and indeed mute is not working [the slider volume does].
    On a Teensy 3.2, mute does work [as well as the slider volume].
    Used this code to verify on...
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    Just curious; which application are you using? ...

    Just curious; which application are you using?

    And how is the PCM2900 circuit actually implemented? According to one of the "typical circuit connections" as mentioned in the datasheet?

    Paul
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    On the product page...

    On the product page of the PCM2900, under Features, it is stated that the chip supports "Human Interface Device (HID) Volume Control and Mute Control".
    Could it be that on these various Windows 10...
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    Agree with TeensyWolf, a CAN bus analyzer like...

    Agree with TeensyWolf, a CAN bus analyzer like this one, saved me a lot of time while debugging a Teensy-based CAN bus device.

    Paul
  28. 25045 Paul

    25045

    Paul
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    Like Frank B, I vaguely remember that I have been...

    Like Frank B, I vaguely remember that I have been playing with the TDA1543A as well.
    But I also could not find the chips in my drawers anymore...
    Since I have a working setup with the TDA1543 non-A...
  30. 5K+ Stock here:...

    5K+ Stock here: https://www.chipsmall.com/Products/MK66FX1M0VMD18_13204072.html.
    Another HK-based supplier.

    Paul
  31. Sorry to hear. Just curious, what was the issue?...

    Sorry to hear. Just curious, what was the issue? Availability? Payment conditions?

    Paul
  32. Agree. As far as I see on the schematic, the...

    Agree.

    As far as I see on the schematic, the only other pins of the processor that could be influenced by the Vin, are pins USB1_VBUS & USB2_VBUS [called USB_OTG1_VBUS & USB_OTG2_VBUS in the...
  33. If I read the datasheet...

    If I read the datasheet correctly, the maximum dropout voltage can be 475mV:

    24991

    So, it's wise to supply at least 3.775V to the Vin pin.

    Regards,
    Paul
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    Could you powerdown and powerup your PC for a...

    Could you powerdown and powerup your PC for a test? [not a Windows Restart but a complete power down].
    When my desktop PC was still running Windows 7, every once in a while I had to do this...
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    Hi Srendi, You may want to select your COM...

    Hi Srendi,

    You may want to select your COM port from the upper "Teensy Ports", like this:

    24970

    From your serial monitor snapshot it looks like you selected your COM port from the lower...
  36. My first thought was a power-only USB cable but...

    My first thought was a power-only USB cable but you tested that apparently.
    Did you try another PC/laptop? Did you plug in the USB cable all the way into the Teensy LC USB connector?

    Regards,...
  37. Blueschip seems to 4K+ parts on stock:...

    Blueschip seems to 4K+ parts on stock: https://www.blueschip-store.com/parts/MK66FX1M0VMD18/710964.html
    Not familiar with Blueschip though - only know that they are Hong Kong based.

    Regards,
    Paul
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    When you plug in the USB cable to the Li-Po...

    When you plug in the USB cable to the Li-Po backpack, which LEDs on the backpack light up? And what is the voltage on the BAT pin that connects to the Teensy 3.2 Vin pin? Do you have the battery...
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    PJRC supplies several example audio files, you...

    PJRC supplies several example audio files, you can find them here.

    Regards,
    Paul

    PS: you know about the CODE tags to make your post more pleasantly readable?
    24939
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    I'm not sure the A flavor of THD1543...

    I'm not sure the A flavor of THD1543 requires/expects 24/32 bits. It's a 16bit DAC after all. The attached datasheet doesn't mention it as far as I can tell.
    Perhaps you should give this code a...
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    Is there a reason that you don't use the supplied...

    Is there a reason that you don't use the supplied Teensy Audio Library? The TDA1543A is supported according to this page [top row].

    Regards,
    Paul
  42. "So you are saying that I should take the fuse...

    "So you are saying that I should take the fuse out": Yes.
    "and just connect VBUS directly to GND?" No. Because that will short the VBUS from your laptop. Just leave VBUS unconnected.

    Since you...
  43. If you connect the fuse to GND as in screenshot...

    If you connect the fuse to GND as in screenshot #2, you effectively short the USB power [VBUS] to ground, which will trip fuse F1 [or the fuse at the laptop side on the VBUS, whichever one is faster...
  44. You're welcome. Happy to hear the LC is still OK....

    You're welcome. Happy to hear the LC is still OK.
    About the Vin pin: when you connect the Teensy LC with a USB cable to a PC, the output voltage on that Vin pin will be the USB 5V. You can pull...
  45. It looks like you connected the 5V of the...

    It looks like you connected the 5V of the joystick to the Vin pin of the Teensy LC.
    Please connect it to the 3V3 pin of the Teensy LC.
    The Teensy LC pins are only 3V3 rated...hope the board and/or...
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    Looking forward to your creation! Paul

    Looking forward to your creation!
    Paul
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    You have to add a potmeter yourself with the...

    You have to add a potmeter yourself with the aliexpress pedal though...
    "The notched wheel is not in the right format for the Dunlop potentiometer" according to the comments.

    Paul
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    Or even cheaper and stereo:...

    Or even cheaper and stereo: https://www.thomann.de/de/lead_foot_lfv2.htm
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    What about this one:...

    What about this one: https://www.thomann.de/de/lead_foot_lfx1.htm?
    Or this one: https://www.thomann.de/de/lead_foot_lfv1.htm

    Paul
  50. Just did a quick test with a joystick and Teensy...

    Just did a quick test with a joystick and Teensy LC:

    24674

    Ran the basic example and executed joy.cpl on Win10:

    24675

    All looks good.
    Paul
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