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I spent a lot of time and blood, sweat and tears trying to do this in spring of 2016. You can find my pleas and my solo discoveries on the RPi site forums. I was able to manually send things to the board and hear them at the wrong speed, but never got it to work right or be recognized by...

In case anyone else comes looking for info, I have managed to communicate with the Teensy Audio Adapter from RPi. It was a problem with the 16-bit register addresses. I can send arbitrary-length arrays of bytes, though, and if I just send [reg-addr-MSB, reg-addr-LSB, value-MSB, value-LSB] it...

I may have figured something out. The SGTL5000 uses two-byte register addresses, while most of the I2C implementations I've been able to use assume 1-byte register addresses. It could explain how data gets corrupted while trying to read, as the first message sent to read a register is in fact a...

Hi. I've been trying to use a Teensy Audio Adapter with a Raspberry Pi 3. It's still 3.3 V, and all of the communication protocols are present. I can send a master clock from a GPIO pin as I explain here: https://www.raspberrypi.org/forums/viewtopic.php?p=957996#p957996 And then I see 0a on...

Paul, does this sound feasible, from what you know? The I2C interface of the Teensy Audio Adapter is controlled by one board, be it Arduino or Teensy; and the I2S data comes from Raspberry Pi, using its various bizarre simple dummy card setups (that supposedly work for just sending I2S without...

Thank you. Your driver code is very clear. I've lost myself in ALSA and not made much progress. There is a SGTL5000 driver, actually published by Freescale, but that's not enough for the ALSA people. You need a driver for the SoC, a driver for the codec, and *another* driver to communicate...

Thanks for the tips. Just for the first tests, I'm using a GPIO clock from RPi3 to clock it, and if I set that clock to 9.6 MHz, it shows up on I2C, but that's as far as I can get. (9.6 as in half of the main 19.2 MHz oscillator, and within the range of external clocks that the SGTL accepts. I...

I was planning to use a crystal oscillator. But it's not clear to me how the data and clock transfer works. If I use the SGTL5000 in slave mode, I send the MCLK only to it, and it sends the LR and bit clocks to the MCU, which sends back the data? And in slave mode, all of the clocks and data...

Still, that would be some bang for the buck. Alllllmost under $100. There are some systems available for about that, and they have the advantage of some kind of warranty. That's amazing. I feel a little better, actually, foregoing a wireless system, seeing their criticism of all of the other...

Well, you could use it for any guitar with a 1/4" jack output, if the device existed, but I've shelved the idea for now. -Chuckk

From what I've seen, it can't be much more of an issue than what people run into with any other audio card and RPi. Well, any other card with ADC and DAC. I've placed an order from Hobbytronics UK, untracked, so I don't know when, but I'll see how it goes one of these days! Seriously, I saw so...

Hello. 1. I've found several distributors with reasonably-priced Teensy merchandise in Europe, but I see that some have black and some have green audio adapter boards. I just want to be sure before I order. I found a post on these forums from 2014 with a photo of a black one, so I'm guessing the...

Thanks for the thoughts there. You have given me reason to reconsider the TI wireless audio system. I did find something else that might be interesting: http://www.semiconductorstore.com/cart/pc/viewPrd.asp?idproduct=50595#Features It claims to have 3 ms latency, so who knows? But it's...

Thanks for the replies. I was really wondering, though, whether a Teensy 3.2 could handle copying that amount of data from one serial device to another. As for the radios, I was planning to ask about that in other places, although it seems I've found something made just for this that 1. isn't...

Hello! I'm checking out Teensy for this project. Systems can be found for about 100 Euros. They use adaptive fsk, 24 bit audio at 48k samples/second, but if I make my own I'm willing, and obligated, to accept 16 bits at 44k1 samples/s. I was planning to use an Arduino, but the consensus seems to...