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  • Blackaddr's Avatar
    02-19-2019, 11:47 PM
    I don't see any obvious difference vs my design for the I2S/I2C lines other than the pullups for I2C. 4.7K is a little weak for 3.3V, mine are in the 2K range. This shouldn't be a big problem though. You need to figure...
    17 replies | 688 view(s)
  • Blackaddr's Avatar
    02-18-2019, 03:20 PM
    I've seen USB audio issues discussed at length in a couple different threads including a detailed one with Paul and FrankB though that was addressing clicks, rather than high pitch noise harmonics. If it's noise from...
    2 replies | 143 view(s)
  • Blackaddr's Avatar
    02-18-2019, 03:14 PM
    As mentioned above, my BALibrary uses the WM8731 in slave mode. I provide a replacement for the default AudioControlWM8731 called BAAudioControlWM8731. It provides some robustness enhancement on the I2C bus as well as...
    17 replies | 688 view(s)
  • Blackaddr's Avatar
    02-08-2019, 12:04 AM
    I've found use for the external memory for some more complex effects, particularly for Sound-On-Sound which is admittedly still delay based though. All the effects in BALibrary use DMA SPI for external memory usage so...
    15 replies | 323 view(s)
  • Blackaddr's Avatar
    01-18-2019, 05:29 PM
    Blackaddr replied to a thread Midi in Audio Projects
    If the device only has USB, you would need something to act as a HOST and can recognize USB MIDI Class compliant devices in order to extract the data, then send it out a serial port instead. You may be better off...
    3 replies | 132 view(s)
  • Blackaddr's Avatar
    01-13-2019, 12:52 PM
    Thanks! Paul did such an amazing job with his Audio library making it super easy for people to get started with audio projects in general, I was thinking what might the next step be? Having some functionally that is...
    2 replies | 228 view(s)
  • Blackaddr's Avatar
    01-05-2019, 03:30 PM
    I've added a new effect to BALibrary: Tremolo The effect has the following controls: bypass, rate, depth, volume. Like all the other effects in the library, AudioEffectTremolo supports runtime control of the...
    2 replies | 228 view(s)
  • Blackaddr's Avatar
    01-05-2019, 03:10 PM
    Just to reinforce what the others have said, if you have the opportunity to adjust pitch when the sound is generated, DO IT! Pitch-shifting audio samples after synthesis is one of the most challenging tasks in audio...
    4 replies | 220 view(s)
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About Blackaddr

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About Blackaddr
Engineer by day, Maker by night.
Guitar Digital Modelling


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wm8731+teensy schematics? 02-19-2019 11:47 PM
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