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13. ERROR DISPL AY

If there’s no jack present on the input no LEDs should be
lit. If there is signal present but it’s level is too low, two
LEDs going up and down from the middle start running.
Increase the level till you reach the threshold and the
module displays the current note.

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Summary of Contents for TUNE

Page 1: ...ANTUMBRA TUNE MANUAL ...

Page 2: ...S 5 03 FRONT 6 04 DISPLAY MODES 7 05 RELATIVE MODE 8 06 STROBE MODE 9 07 OUTPUT MODE 10 08 SCALE SELECTION 11 09 VU METER 12 10 SAVING 13 11 NOTE AND OCTAVE VIEW 14 12 SCREENSAVER MODE 15 13 ERROR DISPLAY 16 14 ACCURACY 17 15 SOFTWARE MODIFICATIONS 18 ...

Page 3: ...00 THANK YOU Thank you for purchasing the Antumbra TUNE module In this documentation you can find information about the installation and use of the module ...

Page 4: ...L with the orientation of the cable The RED STRIPE should be to wards the TOP of the module indicated by the white line above the header pins By doing otherwise you can poten tially harm the module or even your whole system Power off your eurorack system and connect the other end of the cable to the power source here also pay attention to the PSU manufacturer s instructions SN74HC595 SN74HC595 ATM...

Page 5: ...ck there is a jumper for enabling the jack lights Note that by enabling them the module draws additional current from the 12V rail Jack lights jumper SN74HC595 SN74HC595 ATMEGA328P AU DG419 TL072 16 000 103 103 103 493 104 104 ...

Page 6: ...03 FRONT 1 Display LEDs 2 Mode button 3 Input jack 4 Output jack C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 2 3 4 1 ...

Page 7: ...Now you are in dis play mode selection Press the button to toggle between the two modes See the next pages for their description When the LED marked with is blinking you are in rela tive mode When the LED marked with 0 is blinking you are in strobe mode Press the button again for 1 sec to exit display mode se lection C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 ...

Page 8: ...nearest notes LEDs are lit above if it s lower they are lit below Adjust the VCO frequency till the LEDs around the blinking note are off and when the blinking LED turns solid you are in tune The current note value is written on the left of the LED C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 FREQ FREQ ...

Page 9: ...ch way the VCO has to be tuned The closer the VCO frequency is to the nearest note the slower the LED is If the VCO frequency is higher than the nearest note the LED goes downwards if it s lower it goes up Adjust the VCO frequency till the second LED stops The current note value is written on the left of the LED C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 ...

Page 10: ... to toggle between the two modes When the LED marked SUB is blinking the output jack pro duces a square wave one octave below the input frequen cy When the LED marked TRU is blinking the input is fed to the output unmodified Press the button again for 1 sec to exit display mode se lection C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 ...

Page 11: ...440 are blinking now release it Press the button to toggle between the two modes The tuning mode changes the scale the module tunes to select between A432Hz and A440Hz tuning modes Press the button again for 1 sec to exit display mode se lection C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 ...

Page 12: ...al is split once from 5 0V and once 0 5V then the absolute larger is chosen Each LED represents about 0 4V In 5V mode LEDs 0 5 represent 5 0V LEDs 6 12 rep resent 0 5V Each LED corresponds to about 0 8V In both mode the peak is held for 1sec To exit this mode press the button for 1sec C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 ...

Page 13: ...10 SAVING The module saves it s current state automatically each time you exit the menu so that it can recover your pref erences on power cycles ...

Page 14: ...d octave view Note display depends on the mode selection described previously Octave is displayed by a slowly blinking LED the octave number is written on the right side of the LED it goes from 1 to 6 octaves C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 read F 2 ...

Page 15: ... can go hectic trying to display the current note to enter screensaver mode press the button twice quickly now it shows that it s in this mode by a single pulsating LED To exit this mode press the button once quickly C D E F G A B 440 432 TRU SUB 0 1 3 2 4 6 5 ...

Page 16: ...esent on the input no LEDs should be lit If there is signal present but it s level is too low two LEDs going up and down from the middle start running Increase the level till you reach the threshold and the module displays the current note ...

Page 17: ...er frequencies The measurement accuracy should be between 3 cents TUNE works best with simpler repeating waveforms it could have a hard time measuring the frequency of chords complex and modulated waveforms Threshold level Input signal Input signal transformed to square Optimal waveform for measurement Not optimal waveform for measurement ...

Page 18: ... here I as sume you know what you are doing If you are unsure of what you are doing please contact Antumbra in email at antumbramodular gmail com Use the 6 pin SPI header on the back to upload code to the module You will need an AVR programmer for this Pin 1 is marked by a dot below the header SPI header SN74HC595 SN74HC595 ATMEGA328P AU DG419 TL072 16 000 103 103 103 493 104 104 ...

Page 19: ...TUNE is designed by David Szebenyi under Antumbra www antumbra eu Manual by David Szebenyi www aman hu 2020 All rights reserved ...

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