Blackaddr
Senior Member

I've created a very low-noise Teensy Audio Shield so I can assure you it can be done. Take a look here for full details, including the schematic: TGA Pro For starters with PJRC Audio Board, you must turn off the HPF...

Yes, can power from your PCB, or via USB but NOT at the same time. As long as you never do that you should be fine. I also have made a Teensy guitar pedal and while it's not that difficult to get something basically...

The SNR of the WM8731 codec is 90dB, but you'll never get that in a real guitar circuit. Every component in the entire signal chain add some kind of noise and the CODEC is the lowest source of noise. Most noise floors...

You didn't mention what you are using it for? Line-level signals? Guitar signals? Microphone? I have a Teensy shield that is optimized for low-noise and guitars but can also used with line level....

Hey Pio, for what it's worth, I think your existing approach to floats is the best compromised approach. Using floating point from end to end is wasteful of a lot of computation. 16-bit transport between effects if...

Looks pretty cool! I'll have to give this a try. What is the processor usage % on the T4?

That TI part you've selected looks pretty good based on what you're asking for. Personally, I'm partial to the WM8731, mainly because it's decently priced, comes in a TSSOP package (easier to solder vs QFN or BGA),...

If you're going to be using a SPI memory you probably want to be using DMA for transfers so that the CPU doesn't waste cycles busy-waiting. However, DMA only helps you if you've got something else for the CPU to do...

You might also want to take a look at the TGA Pro Audio Board. I specifically designed it for handling both line-level or guitar signals and helping out people who don't want to deal with a lot of difficult surface...