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Testing and calibrating the Radio Music module

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TomWhitwell edited this page Aug 29, 2017 · 3 revisions

Test the power supply

  • Remove the Teensy, don't install the TL074 yet
  • Check the diodes and electrolytic capacitors are all aligned the right way
  • Inspect all the solder points on the board - I often find I've missed a pin somewhere.
  • If you want to do a pre-flight check:
    • NB: The 5v regulator is grounded through the Teensy itself. To test without the Teensy in place you need to run a wire from the GND pin to AGND pin (see the card that came with your Teensy)
    • Plug the back board into a power header and check:
      • +12v at pin 4 of the TL074 (NB, that IC is 'upside down' - pin 1 is at the bottom)
      • -12v at pin 11 of the TL074
      • +5v at the Vin pin for the Teensy. NB you will only see 5v here if you have a ground wire running between GND and AGND

Finish Assembly

  • Add the TL074 IC (NB, that IC is 'upside down' - pin 1 is towards the two polybox capacitors )
  • Add the Teensy, with the firmware in place.

Calibration

  • Connect the power header and a patch cable to your modular output
  • The trimmer on the back sets the output volume - adjust to your needs to avoid distortion
Add a custom footer

Building the module

  1. Parts List
  2. Preparing your Teensy 3.1 or 3.2
  3. Formatting and setting up the SD Card
  4. Building the module
  5. Testing and calibration
  6. Troubleshooting and FAQ
  7. PCB Versions
  8. Schematics

Using the module

  1. How to use the Radio Music module
  2. Suggested Audio for the SD Card
  3. Audio packs to download
  4. Patch Recipes
  5. How to tweak your module by editing the settings.txt file
  6. Guide to the 2017 Firmware

Hacking and expanding the module

  1. Reprogramming the module
  2. Alternative firmware for Radio Music

Background

  1. John Cage, Stockhausen and music from radio
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