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  1. It seems to work. Thanks! Attaching a couple of...

    It seems to work. Thanks! Attaching a couple of photos. I've also used sockets for everything, so that I don't need to resolder if I nuke something.

    1797517974
  2. I was wondering if it's needed to duplicate the...

    I was wondering if it's needed to duplicate the resistor for ADC and DAC. My current thinking is to try something like:



    __ ADC LRC
    ...
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    Thanks! The theoretical part makes more sense to...

    Thanks! The theoretical part makes more sense to me now!

    Now I need to figure out how to load that wav file into the filter...

    Sounds like Teensy 4.0 having more memory would help.
    Apart from...
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    Impulse Responses for Dummies

    Hey,

    I'm trying to understand the impulse responses in order to use them, but it doesn't come easy :).

    All the impulse responses I've found are coming in a form of wav file (which sounds like a...
  5. I am wondering why did you use LRCLK and BCLK...

    I am wondering why did you use LRCLK and BCLK resistors for ADC only? I'm resetting up the same thing with T4 (had it with 3.6). Would it make sense to have the resistors on all three LRCLK, BCLK and...
  6. @KurtE, thanks. But the microUSB (the one I...

    @KurtE, thanks. But the microUSB (the one I connect to program) is 480 Mbits as well? And the https://www.pjrc.com/teensy/usb_serial.html will utilize the whole bandwidth? It's very cool that the...
  7. Teensy 4.0 microUSB speed and CS42448 support

    Hi,

    It's pretty exciting to see that Teensy 4.0 is out!

    I would want to clarify two things before ordering one:

    1. Will Paul's CS42448 TDM board work with it? Will I need to readjust the...
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    CDCACM serial at 480 Mbits

    I'll start a separate dedicated thread as I seem to have the problem narrowed down (that's the initial thread: https://forum.pjrc.com/threads/56595-USB-Host-Force-Detection).

    I try to connect a...
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    More intermediate results. If I comment all the...

    More intermediate results. If I comment all the checks out (starting from «if (descriptors[9] != 7) return false; // length 7» till «if (descriptors[21] != 0) return false;», then hardcode txsize and...
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    So, I've received the USB connector boards and...

    So, I've received the USB connector boards and soldered one directly on top of Teensy.

    It's definitely a progress, but seems to be not there yet :).

    It all works when I force it to 12 Mbits (in...
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    Thanks so much! I will let you know, but it...

    Thanks so much!

    I will let you know, but it might take some time. In order to not ruin the whole thing with my unskilled soldering I've ordered a bunch of these:...
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    Doesn't seem to help. It is a long shot as well,...

    Doesn't seem to help.
    It is a long shot as well, but my current hypothesis is that there might be an interference preventing from 480 Mbits capability... I have pretty short wires between the USB...
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    My current finding: the async follow-up callbacks...

    My current finding: the async follow-up callbacks are not being called. And if I uncomment «USBHS_PORTSC1 |= USBHS_PORTSC_PFSC; // force 12 Mbit/sec» line in ehci.cpp, the device starts to be...
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    As far as I know, Raspberry Pi 3 uses microUSB...

    As far as I know, Raspberry Pi 3 uses microUSB port for power only and doesn't have the data wires connected anywhere. Raspberry Pi Zero has it connected, but I don't have one yet to see if it's the...
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    lsusb -v -d 525:a4a7 Bus 001 Device 003: ID...

    lsusb -v -d 525:a4a7

    Bus 001 Device 003: ID 0525:a4a7 Netchip Technology, Inc. Linux-USB Serial Gadget (CDC ACM mode)
    Couldn't open device, some information will be missing
    Device Descriptor:
    ...
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    @KurtE, thanks for the suggestions! Something is...

    @KurtE, thanks for the suggestions! Something is definitely happening under the hood. Also there seems to be a bug somewhere (likely in the USBHost_t36)...

    Teensy is off, the Pi device is started...
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    USB Host Force Detection

    Hi,

    I'm trying to get the second high speed USB port on Teensy 3.6 working for my scenario.

    To power the Pi-like device I have a separate 5v power supply, connected power and ground pins of the...
  18. High speed options for the data out from/in to Teensy 3.6

    Hi,

    I need to send the audio data from Teensy to a Raspberry Pi-like board and receive it back (ideally, I'm talking about realtime sending of all 6 channels from TDM input of CS42448 board to Pi...
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    The codec chip on OSH Park links to CS42448-CQZ....

    The codec chip on OSH Park links to CS42448-CQZ. I've found CS42448-DQZ on AliExpress which seems to be exactly the same except for the wider working temperature range. Should DQZ match as well?
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    Could you by any chance make two or three for me?...

    Could you by any chance make two or three for me? If yes, what will the price look like?
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    I think you have opened a Pandora's box for me......

    I think you have opened a Pandora's box for me... I was exploring more and that CS42448 is exactly what I need! Thanks.
    Am I correct that https://oshpark.com/shared_projects/2Yj6rFaW is the empty...
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    Soldered a jack and tested the pass through with...

    Soldered a jack and tested the pass through with an audio player. It works but the level directly from the Audio Player -> Phones is significantly higher than the level from the Audio Player -> ADC...
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    In desperation I have created even two topics on...

    In desperation I have created even two topics on it :).

    Good news is that I have progress. That's the main one: https://forum.pjrc.com/threads/55963-Quad-channel-input-problem (I've reported the...
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    OMG, several nights of desperation and I think I...

    OMG, several nights of desperation and I think I have managed to make it working.

    I'm definitely doing it not 100% correctly, but here is my diff to the Audio library which makes my setup sound:
    ...
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    @WMXZ that might be something I need. To get my...

    @WMXZ that might be something I need. To get my thing working (https://forum.pjrc.com/threads/55963-Quad-channel-input-problem).

    But it exactly does compile, but doesn't work. And it seems...
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    I try to realistically estimate my capabilities...

    I try to realistically estimate my capabilities and that CS42448 is over my head for now.

    I am a software engineer with a little Arduino experience. I can solder the pins to the board, I can...
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    Thanks for the response! I will really try SD...

    Thanks for the response! I will really try SD card. As you say, there is a chance that it will do the thing. It's just I've been looking at the similar reasoning (with some bandwidth calculations) in...
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    Quad channel input problem

    I'll repost it here since it really seems to be a technical support question and I fear the original topic will be buried (https://forum.pjrc.com/threads/55963-Quad-channel-input-problem).
    ...
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    @PaulStoffregen was Teensy 3.6 ever tested with...

    @PaulStoffregen was Teensy 3.6 ever tested with simultaneous quad channel input and output?

    It seems like there is a configuration problem. With the current configuration only quad channel output...
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    And I actually even doubt that flash memory is...

    And I actually even doubt that flash memory is what I need. It seems I can't overwrite the data without erasing it first and the time to erase seems to be insane on a flash chip (tens of seconds to...
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    Or...

    Or https://www.ebay.com/itm/5-PCS-W25Q128FWSIG-SOP-8-NOR-Flash-Serial-SPI-1-8V-128M-bit-16M-x-8-7-5ns/323757654506...

    I am definitely bad at reading the specs.
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    And I'm even more confused because in some specs...

    And I'm even more confused because in some specs W25Q128FVSG is 128MB in some others it's 128M-bit...

    I've found another one which seems to be 128MB:...
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    Yet another SPI Flash question

    Hi,

    There is a number of threads on SPI Flash, the data is rather scattered and incomplete though. I would really appreciate some clarification.

    I need to record fragments of audio (from the...
  34. Thread: PCM1802 and FSYNC

    by hoho
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    PCM1802 and FSYNC

    Hi,

    I have two types of ADC boards, one is PCM1808, another one is PCM1802.

    PCM1808 connection is fairly simple (thanks to JayShoe who shared the info in another thread).

    But PCM1802 has one...
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    Quad channel input problem

    Hi,

    I'm using PCM1808 ADC board (as mentioned in this topic: https://forum.pjrc.com/threads/53069-Teensy-with-PCM5102a-Module-via-I2S) with Teensy 3.6.

    I'm trying to use two of them at a time. ...
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    @JayShoe, just wanted to thank you again! I've...

    @JayShoe, just wanted to thank you again! I've received the devices and it seems to work (except for the quad channel input but I'll create another topic about it as it seems to be a bug).
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    @JayShoe could you please help me out a bit? ...

    @JayShoe could you please help me out a bit?

    I'm expecting the same DAC boards and almost the same ADC boards (I've ordered PCM1802 boards which seem to be similar to PCM1808 in the provided...
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    Thanks! I suppose I'm only going to discover the...

    Thanks! I suppose I'm only going to discover the rules of art and I suppose I'll be coming back once the eBay delivery has arrived. But generally, I try to use the pre-soldered solutions (not just...
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    Driving two channels with two op-amps

    Hi,

    I need to use two channels of the ADC (either Audio Board or some other stereo ADC board) independently through two different op-amps. One op-amp is for the microphone, another one is for the...
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