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I've just checked two chips (so, four CS pins) with new T4 arrived. And it seems to work. So something was definitely wrong in my setup. And thanks for the SCK speed tip. I'll be gradually adding...

I was fearing SMD for quite some time. It's turned out to be pretty easy with the right tools.

I've got a simple hot air soldering station and an SMD soldering paste. But what makes it really easy...

Thanks for the response.

I am now thinking the problem is in my setup...
I use pins 2, 3, 4, 5, 6, 9, 10, 24, 25, 28, 29, 30, 31, 32 for CS. Seven S70FL01GSAGMFI013 chips (each chip has two parts...

Hi,

I've made a board under assumption that any digital pin can be used as chip select pin (my board uses 14 digital pins for 14 NOR flash modules). Unfortunately, it doesn't work at all. I've...

Just FYI, I've finally soldered that CS42448-DQZ and it seems to be working.

Wow, 4.1?
Pretty cool :).

Thanks!

Two things have made me wondering: 5V on pin 8 of 6N138 and the lack of T4 mention on that page.

Makes sense to update that page and add T4 to the table. So that people like me don't...

Hi,

It's probably asked and answered multiple times, but I can't create a search query to find it.

Is the circuit from https://www.pjrc.com/teensy/td_libs_MIDI.html (the first one with 6N138)...

After several WTF moments, I've managed to get this chip working.

That chip is actually mentioned here...

Thanks. I will have that in mind.
I've ordered a couple of S70FL01GSAGMFI013 to try. If I will manage to get them working, I'll order more, otherwise will be trying other approaches.
Theoretically,...

And if I read the datasheet correctly, this chip consists of two parts and requires two chip select pins.
I probably could reduce the number of samples to 500MB, which will require 4 chips and 8...

Why is it always falling down to the insanity... :)
As far as I can find, Cypress S70FL01GSAGMFI013 seems to be the only 1Gb option available to order in Europe.
Not cheap enough to order it...

I've learned about Mbits some time ago, yeah, it was disappointing.

But given it's SPI, I suppose I would be ok to have an array of, say, up to 4 chips, I can spare 4 pins for the chip select...

Hi,

What is the biggest (storage-wise) SPI flash chip known to be properly working with Teensy as of today? Which is available and not obsolete.
I have found a number of Paul's mentions of NAND...

To chime more in. The problem is indeed Teensy 4.0 related.
My wiring was correct. I'm just trying the same setup but with Teensy 4.0 as master and Teensy 3.6 as slave — and it works.

I don't have the audio shield. It has inconvenient form factor and connectivity options (two separate smaller boards for ADC and DAC without unnecessary components are more flexible), plus it has SD...

Just in case you will try — be carefull, it's very loud.
I was lucky to have it in the headphones which were not fully on me.
Otherwise, I wouldn't care about the sounds anymore :).

The basic connections are the same as on these pictures: https://forum.pjrc.com/threads/57267-Fast-Convolution-Filtering-with-Teensy-4-0-and-audio-board?p=219550&viewfull=1#post219550. The same...

Hi,

I'm trying to connect two Teensys 4.0 together. One is I2S master, the second one is I2S slave, with a simple PassThroughStereo example in both (the second one uses the slave I2S classes)....

I've got the chip, but I haven't soldered it on the board yet. Because T4 has arrived and it fits my project better and it would make sense to have a T4-dedicated board instead of soldering a 3.6...

Thanks!

Is there a prediction about when the audio USB type is coming to T4?

By the way, I don't see other than Serial options in the USB type menu for T4 (for T3.6 there are all kinds of options).

Hi,

An idea has just crossed my mind.
Can I use multiple AudioInputUSB/AudioOutputUSB objects at the same time?
For example, if I will try to use four AudioInputUSB objects and three...

Thanks! Though if there is an option I would really prefer the «tested by multiple people» version :). And thank you for opensourcing your thing.

Paul, I'm wondering what do you use to create gerber files? I mean which application (KiCad or something else).

And if there is a chance that you could share the source file of the CS42448 board?...

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...

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...

@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...

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...

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...

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...

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...

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:...

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...

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...

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...

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:
...

@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...

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...

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...

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?

Could you by any chance make two or three for me? If yes, what will the price look like?

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...

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...

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...

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:
...

@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...

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...

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...

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).
...