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  • Blackaddr's Avatar
    01-18-2021, 12:45 PM
    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...
    10 replies | 256 view(s)
  • Blackaddr's Avatar
    01-11-2021, 12:38 PM
    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...
    8 replies | 214 view(s)
  • Blackaddr's Avatar
    01-05-2021, 12:49 PM
    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...
    16 replies | 439 view(s)
  • Blackaddr's Avatar
    01-05-2021, 01:47 AM
    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....
    16 replies | 439 view(s)
  • Blackaddr's Avatar
    01-03-2021, 12:32 AM
    Blackaddr replied to a thread freeverb noise ? in Audio Projects
    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...
    13 replies | 412 view(s)
  • Blackaddr's Avatar
    01-01-2021, 08:38 PM
    Looks pretty cool! I'll have to give this a try. What is the processor usage % on the T4?
    6 replies | 341 view(s)
  • Blackaddr's Avatar
    12-30-2020, 12:59 PM
    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),...
    6 replies | 357 view(s)
  • Blackaddr's Avatar
    12-28-2020, 10:28 PM
    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...
    3 replies | 276 view(s)
  • Blackaddr's Avatar
    12-28-2020, 10:19 PM
    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...
    7 replies | 333 view(s)
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About Blackaddr

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About Blackaddr
Biography:
Engineer by day, Maker by night.
Location:
Canada
Interests:
Guitar Digital Modelling
Occupation:
Engineer

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How to reduce power supply noise 01-18-2021 12:45 PM
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03-09-2017