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The right connection is:

Teensy4.0 <----> SD Socket
10-(CS) <---> 2(CS)
11-(MOSI) <---> 3(CMD, Data In)
12-(MISO) <---> 7(DAT0, Data Out)
13-(SCK) <---> 5(CLK)

Thank you Paul, thank...

The second link helps a lot, thank you!
My diagram looks like:
Teensy <----> SD Socket
10-(CS) <---> 2(CS)
11-(MOSI) <---> 7(DAT0, Data Out)
12-(MISO) <---> 3(CMD, Data In)
13-(SCK) <--->...

I don't want to be insolent....
Can you tell me how to connect Pin 10..13 from Teensy to the SD-Card (DAT2, DAT3/CD, CMD, CLK, DAT0, DAT1)?

I want to integrate the Audio Shield into a custom board.
Does anybody know what SD socket is used?
Maybe with a footprint for Target or KiCad?
Or at best: Is there a PCB layout (Target or KiCad)...

Thank you very much! It is working now!

Hello!
I soldered a W25Q128JVSIM flash memory onto the Audio shield and it works fine.
I soldered another one to a Teensy 4.1 and I get "Unable to access SPI Flash chip" from "ReadBenchmark"...

Hello!

I want to disable the mic input and therefore called the SGTL5000 micGain with parameter 0. When doing this I noticed that my Line-In level also dropped.
I looked into the code(file...

I already guessed it had to do with precompiled libraries...
Thank you for the clarification.

Mhm, doesn't seems to be such easy...
I measured the amount of samples per second while recording and it shows 44188.(not 48k as expected)
I made a recording of a 1kHz signal (@48kHz) which shows...

Hello!

I read several threads regarding changing the sample frequency on a T4+Audio Shield. With each post or comment I read my confusion grows ho to do it...
Maybe one of the pros can point in...

My solution is to dissect my incoming data into portions <64k. To have a "real" solution FastCRC must be fixed. (At least FastCRC should return an error code if called with a buffersize >= 64k)

Oh, I think I can answer it by myself. I just looked into the source code of FastCRC. The length parameter for the buffer is of type uint16_t. So it looks like that FastCRC is limited to 64k-1.

Hello!

I think the CRC32 library has a bug if the buffer size containing the data is 64k or bigger.

I wrote a little function in java running on a Linux PC calculating the CRC32 of a dummy data...

I had to fix your code a little bit but I understand your intention.
Problem is: 'Break' is no valid character, it's the result of the transmit line being low for a longer time than a frame lasts....

I don't understand your answer at all. Can you be more precise? e.g. "instead of .print(), do a Serial.write() to view the actual byte". I don't use .print() ... and Serial.write() cannot be used to...

Hello!
Is it possible for a Teensy 4.1 to recognise a serial break sent from the PC side?
And if yes: How?

Uwe.

P.S.: The "PC" side is a PC running a Java program using...