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    There are two modes Teensloader_CLI put teensy...

    There are two modes Teensloader_CLI put teensy into programming mode (at least the version I have)
    - changing baudrate when (USB) Serial is used
    - send some bytes when HID is used.
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    SD.h uses SdFat So suggest to modify the SdFat...

    SD.h uses SdFat
    So suggest to modify the SdFat config.h to meet your requirements
    Maybe you could also ask Bill Greiman to advice on convering SdFat into a basic one
  3. and on teensy? what's the output? (please use...

    and on teensy?
    what's the output?
    (please use the CODE wrap)
  4. Could he not run a program on teensy that...

    Could he not run a program on teensy that configures teensy as a slave?
    That's why my reference to the forum rule.
  5. please follow the Forum rule

    please follow the Forum rule
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    @luni, this one seems be a non teensy guy

    @luni,
    this one seems be a non teensy guy
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    and this can even be empty, as long setup() and...

    and this can even be empty, as long setup() and loop() are in a regular c/c++ file
  8. When you change the default values in config.h,...

    When you change the default values in config.h, you must also delete the config.txt file on disk. the values in the file override the default values.
    IOW, no need to change Parameters in config.h,...
  9. or change any options (CPU speed, optimisation,...

    or change any options (CPU speed, optimisation, usb type, etc)
  10. after deleting the utility folder, you should...

    after deleting the utility folder, you should force a complete recompile
    this can be done by, for example, changing the CPU speed.
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    yes let's continue in other thread. I guess you...

    yes let's continue in other thread.
    I guess you downloaded from github zip file, extracted into Arduino folder and compiled with TD?
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    Could you please tell me what TeensyDuino version...

    Could you please tell me what TeensyDuino version you are using?
    BTW you are compiling microSoundRecorder and not SimpleAudioLogger
  13. maybe avoiding using namespace std; and use...

    maybe avoiding

    using namespace std;
    and use directly

    std::sort
    could avoid side effects of <algorithm>
    but without source code difficult to say

    Edit: just say latest reply
  14. BTW, I just playing with IIR implementation for...

    BTW,
    I just playing with IIR implementation
    for Teensy you may consider the CMSIS DSP functions.
    but for understanding I converted a cascaded Biquad to Matlab


    ic=3; % number of biquads
    %...
  15. My understanding is that Type II can easily be...

    My understanding is that Type II can easily be unstable:
    you first have the AR and when the dynamic range of the computer is not sufficient (64 bit may not be sufficient) then solution oscillates...
  16. with the following coefficients const double...

    with the following coefficients

    const double a[] = {
    1, -9.544621361945, 41.00487909342, -104.4173708231,
    174.5348069734, -200.0948614402, 159.3409444366, ...
  17. it seems that the filter is NOT stable (most...

    it seems that the filter is NOT stable (most likely too high order)
    try following Matlab code

    a=[1.0, -9.7723, 42.9767, -112.0082, 191.5851, -224.7201, 183.0563, ...
    -102.2575, 37.4887,...
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    which says odroid@odroid

    which says odroid@odroid
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    have also a look into teensyloader_cli, which...

    have also a look into teensyloader_cli, which part of the USB message translates to Teensy model
    for example
    the HID uses the capabilities description to infer the Teensy model
  20. This should be the correct interpretation. Are...

    This should be the correct interpretation.
    Are there examples where this does not happen?
  21. you are using DAC and not Audioboard (SGTL5000 +...

    you are using DAC and not Audioboard (SGTL5000 + I2S)
    not sure if T4 has even DAC (output_dac shows no functionioality)
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    If using spi disks then async write is rather...

    If using spi disks then async write is rather easy to implement:
    change in SdFatConfig.h :
    #define SPI_DRIVER_SELECT 3
    and create your own SPI interface as described in SdFatConfig.h
    follow the...
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    can you not make a clearer picture of the Teensy?

    can you not make a clearer picture of the Teensy?
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    see...

    see
    https://forum.pjrc.com/threads/67540-Arduino-2-0?p=281937&viewfull=1#post281937
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    unused pins of Audio board

    I guess this is a question to Paul:

    can you confirm that the unused pins on the audio boards have no internal connection?
    Reason: I would like to stack two audio boards and use unused pins to...
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    AFAICT, The OP was talking about telling teensy...

    AFAICT, The OP was talking about telling teensy to go int bootmode?
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    if you have USB connected and program is running,...

    if you have USB connected and program is running, there is no need to press program button to download now code.
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    @Raymond_Decker Sorry, I have no experience with...

    @Raymond_Decker
    Sorry, I have no experience with PCMCIA.

    However, if you want to get help from someone here on the forum, I suggest to
    create a new thread with better title and be specific...
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    Bill, Paul, not sure if I divert too much, but...

    Bill, Paul,
    not sure if I divert too much, but could it be similar to the following observation:
    I fail to SPI 'mount' a 1 TB uSD on T4.1 if the disk is nearly full but I ' mount' the disks easily...
  30. @zlp yes, that sounds right Meanwhile I added a...

    @zlp
    yes, that sounds right
    Meanwhile I added a _I2S_SGTL5000 symbol to config.h and changed a little bit the main program to make use of, and changes for audio board a little bit easier
  31. @zlp there are two issues - typo:...

    @zlp
    there are two issues
    - typo: "audioshield.inputSelect(AUDIO_INPUT_LINEIN)" has "s" and not "S" (this results in error)
    - the calls to audioShield.xxxx must be within setup()
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    @teensyUsr when installing Teensyduino and if...

    @teensyUsr
    when installing Teensyduino and if not using the windows explorer to locate destination Arduino, it will always locate the first one found and install in top of it.
    If you use a desktop...
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    Not a big deal: To speed up recording and...

    Not a big deal:
    To speed up recording and simplify procedures, extend wav header to 512 bytes by inserting a new chunk with real info or dummy data.
    before closing file, estimate file size etc,...
  34. @KurtE As you noticed, there is no standard...

    @KurtE
    As you noticed, there is no standard implementation of the MTP initiator. Even different Linux implementations seem to behave differently.
    MTP only defines the transport protocol and not the...
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    What I do with my I2S system is to start I2S ...

    What I do with my I2S system is to start I2S (set the enable bits) programmatically.
    This means you should comment the line in audio object and call it directly from sketch.
    the two lines of...
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    That seems to be a little bit complex. I will try...

    That seems to be a little bit complex. I will try to understand it.
    But,
    if you have not done yet, you could (I would)
    - use a low frequency signal, say around 100 Hz
    - apply a FFT
    - select...
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    Thanks for reasoning. So far, I could not see an...

    Thanks for reasoning. So far, I could not see an obvious flaw.

    How did you measure the phase change of 26 degrees?
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    Not sure, if I understand that statement. should...

    Not sure, if I understand that statement. should you not relate the time delay to the frequency and not to the change in frequency, right?

    not clear if you measure phase shift or time delay.
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    Not sure I understand. offset to what? 32...

    Not sure I understand.
    offset to what? 32 samples is a lot.
    how did you determine offset?
  40. see edit in post#3

    see edit in post#3
  41. AFAIK, it is the sequence of connections that...

    AFAIK, it is the sequence of connections that defines the sequence of executions, not the sequence of object declarations.

    Edit: best to check always SW
    It seems MarkT is correct and the sequence...
  42. A general point There is no reset button on...

    A general point
    There is no reset button on Teensy, but a program button that, indeed, removes Teensy from serial port and places Teensy into HID mode for programming.
    This is independent from...
  43. most people read all categories (new posts shows...

    most people read all categories (new posts shows all categories). I would not worry
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    check https://www.pjrc.com/store/teensy41.html...

    check https://www.pjrc.com/store/teensy41.html (bottom)
    From your text it seems to be a 0.22uF decoupling capacitor (C21)
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    I see now, I have to get a TP4056 myself

    I see now,
    I have to get a TP4056 myself
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    @frohr what is the purpose of the VUSB...

    @frohr
    what is the purpose of the VUSB connection? it only goes to usb.
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    I would not use 2 different I2S devices, but use...

    I would not use 2 different I2S devices, but use the two ADC in parallel with 1 I2S device (I2S1 has 4 data lines)
    MCLK, BCLK, LRCLK do in parallel to both ADC
    data lines are kept separate (on T4.x...
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    Why not turning the issue around? configure your...

    Why not turning the issue around?
    configure your CMake setup such that it is Arduino compatible.
    That is what I do with my makefile setup (using VSCode)
  49. You can use usb-audio and other audio objects...

    You can use usb-audio and other audio objects without an audio board.
    you only should have a true audio input/output object in the setup.
    e.g
    AudioOutputI2S i2s1;
    even if you do not...
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    please give the "mtp.disk serial" mode including...

    please give the "mtp.disk serial" mode including a recognized PID value a serious consideration.
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