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Excellent news! You’re very welcome - that’s one of the things a forum is for…

The boilerplate SD startup code in most of the demos (and which you've essentially copied) is poorly conceived, in that it gives the card just one chance to start, then whinges about it forever. I...

I don't use Platformio myself, so no real idea, but your suggestion of installing the Arduino beta then copying the required change across sounds viable. The only changed file you'd need to fix your...

Yes, sorry, was lazy with my editing the quoted message!

Which version of Teensyduino are you using? There’s a fix for this issue in 1.57 beta 3.

Pro tip: using th code tags (# button) will make your code more readable on the forum.

Looking at the AudioPlaySdWav code (which is deeply nasty), it looks as if it may require an audio interrupt to fire after a .play(), before .isPlaying() becomes true. A crude fix might be putting a...

I think there's something slightly screwy with your maths here - each I²S out gives two channels, so you can have 4x2 on I2S1 and another 1x2 on I2S2 for an easy-ish maximum of 10 output channels.
...

Great news it works! Squeal ... not so good. I've used much longer wires (~20cm) for quick tests, but not connecting to anything much. Could be a ground loop or similar: I'm guessing the mixer is...

You also need the I²C control pins (18 and 19) connected, or the sgtl5000_1 commands won't work. I also seem to recall you need both the Gnd pins wired, not 100% sure about that.

Agree the Teensy 4.1 renders some of the rev D audio board redundant, but it's all useful for those who prefer to use the Teensy 4.0 (for size reasons etc.), and I guess it doesn't make sense for...

This thread might be of interest. You can fit a couple of PSRAM chips to the Teensy 4.1 and another to the audio board, which gives you a total of 4.75 minutes of delay (not all in one lump, though)....

Great! Simple solution, it's just knowing where to look... also it's brought to light an error in the Audio Shield documentation, which I can

It would be good if you could share your design on...

For sure, remove the call to i2s1.begin() - that’s a killer! You also don’t need to connect() the patch cords or begin() the SD wave player object, though I think those are harmless.

That should...

Hi folks

I've put in PR #439 for an update I've done to enable use of any available TwoWire-based I²C bus for control of a PJRC audio shield, using AudioControlSGTL5000. You'll obviously have to...

I've now also had a try at pushing all the audio I/O initialisation code into FLASHMEM. However, it only saves just over 8k if you have one of everything (which isn't possible anyhow), so I don't...

So many pubs have closed ... we used to walk across the cemetery to one in Gwydir Street, don't recall which one. Don't think Clive ever had occasion to do business with Laserpoint.

Laserium at...

That's teamwork, that is...
Laser Point (or Laserpoint) does ring a vague bell, don't know why. I was working for Sinclair Research from 1983 to 1986, in Willis Road then Milton Hall. It's a small...

TheHermit for the WIN! Woo, as I believe the Young Folk are fond of saying, hoo.

Thanks for doing that testing, helps build at least my confidence that we're getting somewhere.

Ah, OK. Gotcha.

I had another look ... and this sprang out at me (lines 31-33 of knobby.ino):

const int redPin = 2;
const int greenPin = 3;
const int bluePin = 4;Uh-oh, I thought. Changed...

Um ... loaded it up, and I can't find a DAC object in your design ... am I missing something?

PaulS posted the links in https://forum.pjrc.com/threads/70409-Teensyduino-1-57-Beta-2 - the Announcements category tend to be where the bleeding edge stuff is linked from.

OK, that's fine. I think the results are all over the shop anyway, so changes on a like-for-like test are pretty much expected. The hope is that with 1.57b2 everything will pass. It should be fine to...

...and. I've had a crack at re-ordering the ::begin() code for most of the Audio I/O objects, the result of which can be found at https://github.com/h4yn0nnym0u5e/Audio/tree/fix/io-inits. I've done a...

SSSSSPPLOOOOSH!

Yup, Paul has put @KurtE's mods into 1.57b2, so you have the choice of just the audio PR or the whole shebang. Up to you...

Thanks @TheHermit! And yes, please don't risk any of your hardware...

For the moment I'd say we'd like confirmation that your previous tests and use-cases are more robust / completely fixed. You...

At the moment, you add another layer of mixers: a bit messy, but they consume very little CPU if the channel gains are set to 1.0 or 0.0, or if the source is not transmitting audio blocks. That's why...

Excellent - thanks.

And input_i2s, too. From input_i2s.cpp:

dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI1_RX);

I2S1_RCSR = I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
#endif...

Been doing more investigation, and I think one key point is that (as @KurtE said in #114) dma.enable() must occur before the I2S hardware is enabled, otherwise the I2S will fire a request to a...

As noted on https://forum.pjrc.com/threads/70406-Cannot-Mix-Playing-WAV-snd-MP3-files-with-latest-cores-library, the dynamic AudioConnection has broken some previous code. That code did rely on bugs...

Looks like Paul has already merged that! I’m a bit concerned that the update_responsibility() line is now out of its previous order…
I can take that on, once the PT8211_2 case has been ratified by...

Great!

I assume you meant "running from FLASHMEM slowed the code down" (which it does, as Flash is slower than ITCM).

Yup, I spotted that too*. Agree it should be changed throughout, if others'...

You seem to be trying to make multiple connections to the i2s1 inputs.

OK, so here's a thing - these are the last few lines of AudioOutputPT8211_2::begin():

dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_TX);

I2S2_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE |...

Well, I'm not sure my code is much more trustworthy than the next person's, but that's what beta releases and GitHub issues are for...

If it's not proprietary, I'd be interested to see your...

Well, it's only "official" in that I've been a bit of a squeaky wheel on the subject, and I put a pull request in on Paul's repository, so it happens to be my code that's been adopted! As yet it...

Dynamic AudioConnection objects are in the Teensyduino 1.57 beta (https://forum.pjrc.com/threads/70196-Teensyduino-1-57-Beta-1).

If you want dynamic AudioStream objects then you could look at...

Have done a PR for GUI++ to make boolean OSC parameters work better, I think. Here's an example, see the code in the LED button in the system group:...

I've been playing with this library again, as a result of seeing this thread. At first I couldn't reproduce the issue, then I could, and now I can't again! However, I may have made some progress, my...

OK, I've encountered this problem again, done some digging, thought I'd found a culprit, and it's now gone away again of its own accord! Very frustrating...

However, for anyone who might stumble...

A few points:

you never set s back to 0, so you will only ever trigger/start the cancellation signal once: I assume that's not your intent...
audio updates, and hence new values for...

The last of these is fixed in my PR #642 (and duplicated in @KurtE’s #644).

Everything else is in AudioOutputPWM, which is @MarkT’s baby - see...

You might want to give my Dynamic Audio Library a try out: the updated audio objects are on github, and you also need AudioStream.cpp and .h from cores, which can be found here. I started a thread on...

So, is that digital or analog?

And, let us know your opinion, what does (sensorPin == LOW) mean?
And what is LOW + HIGH? ;)
And what is (LOW == HIGH) ?[/QUOTE]

So, is that digital or analog?...

Note that dynamic audio connection for the Teensy 3.x is available in PR#642

True, but if USB_SERIAL "wins" then you don't have an audio interface, which will clobber stuff!

Just out of interest I had another play with the TeensyDebug add-on, having failed to get it to...

Repeat disclaimer: I Am Not A PlatformIO User! However...

Looking at the line "; See https://github.com/platformio/platform-teensy/issues/65", I did, and it may be you have to put back the...

Ah, OK, I understand. I don't use PlatformIO myself, so if that's anything to do with your problem I can't help...

As far as I can tell from other semi-related work, there are no problems caused...

Works fine for me here, having transposed it to the Arduino IDE. I had to

enable instantiation of the SOARaudio class in setup()
change from WM8731 to SGTL5000 because that's what I've got
...

This thread may be of relevance. Can't tell, no code provided...

This was still annoying me, so I had a crack at it. Turns out to be a mis-application of the idea mooted by Paul in...