1. Manuals
  2. Brands
  3. future.retro Manuals
  4. Synthesizer
  5. XS
  6. Calibration procedure

future.retro XS Calibration Procedure

Hide thumbs
Table of Contents

Advertisement

Quick Links

Enlarged version
f uture
f f
f
uture r r r r etro
uture
uture
etro
etro
etro
XS Synthesizer
Calibration Procedure

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the XS and is the answer not in the manual?

Questions and answers

Related Manuals for future.retro XS

Summary of Contents for future.retro XS

  • Page 1 XS Synthesizer Calibration Procedure...

  • Page 2: Table Of Contents

    33. Amplifier Diagram NOTE: Due to the nature of the analog circuits used in the XS, the unit should be turned on for at least 20 minutes before the testing and calibration procedure is performed. This allows the circuits to reach their typical operating temperature, and will provide a much more accurate results.

  • Page 3: Calibrating The V/Oct Cv Output

    Step 1, Calibrating the V/Oct CV OUTPUT: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the CV OUT jack to a voltmeter (positive terminal will connect to the tip, ground terminal will connect to the shield of the connector).

  • Page 4: Calibrating The Scale Of Oscillator A

    Step 2, Calibrating the Scale of Oscillator A: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE A output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 5 Step 2, Oscillator A Scale Calibration: Playing C1 on MIDI keyboard Playing C2 on MIDI keyboard Playing C3 on MIDI keyboard Playing C4 on MIDI keyboard Playing C5 on MIDI keyboard Playing C6 on MIDI keyboard...

  • Page 6: Calibrating The Octave Control Of Oscillator A

    Step 3, Calibrating the Octave Control of Oscillator A: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE A output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 7 Step 3, Oscillator A Octave Calibration: Octave control set to 0 Octave control set to 1 Octave control set to 2 Octave control set to 3 Octave control set to 4...

  • Page 8: Setting The Overall Pitch Of Oscillator A

    Step 4, Setting the Overall Pitch of Oscillator A: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE A output jack to a digital frequency counter (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 9 Step 4, Oscillator A Overall Pitch Calibration: Playing note C1 on MIDI keyboard, and Octave switch set for 0, tune oscillator to produce 32.703 Hz...
  • Page 10 Step 5, Calibrating the Pulse Width Duration of Oscillator A’s Square Wave: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE A output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 11 Step 5, Oscillator A Pulse Width Calibration: Square wave with approximately a 50% duty cycle...

  • Page 12: Calibrating The Scale Of Oscillator B

    Step 6, Calibrating the Scale of Oscillator B: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 13 Step 6, Oscillator B Scale Calibration: Playing C1 on MIDI keyboard Playing C2 on MIDI keyboard Playing C3 on MIDI keyboard Playing C4 on MIDI keyboard Playing C5 on MIDI keyboard Playing C6 on MIDI keyboard...

  • Page 14: Calibrating The Octave Control Of Oscillator B

    Step 7, Calibrating the Octave Control of Oscillator B: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 15 Step 7, Oscillator B Octave Calibration: Octave control set to 0 Octave control set to 1 Octave control set to 2 Octave control set to 3 Octave control set to 4 Octave control set to 5...

  • Page 16: Setting The Overall Pitch Of Oscillator B

    Step 8, Setting the Overall Pitch of Oscillator B: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to a digital frequency counter (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 17 Step 8, Oscillator B Overall Pitch Calibration: Playing note C1 on MIDI keyboard, and Octave switch set for 0, tune oscillator to produce 32.703 Hz...
  • Page 18 Step 9, Calibrating the Pulse Width Duration of Oscillator B’s Square Wave: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 19 Step 9, Oscillator B Pulse Width Calibration: Square wave with approximately a 50% duty cycle TESTING THE PULSE WIDTH MODULATION FOR OSCILLATOR B Using the same settings, set the PWM control fully clockwise, and the PW MOD control to the MANUAL setting. You should see the square wave create a pulse width similar to that shown here.

  • Page 20: Calibrating Oscillator B's Triangle Wave Shape

    Step 10, Calibrating Oscillator B’s Triangle Wave Shape: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 21 Step 10, Oscillator B Triangle Wave Shape Calibration: Nice symmetrical triangle waveform...

  • Page 22: Calibrating Oscillator B's Sine Wave Shape

    Step 11, Calibrating Oscillator B’s Sine Wave Shape: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the WAVE B output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector).
  • Page 23 Step 11, Oscillator B Sine Wave Shape Calibration: Nice symmetrical sine waveform...

  • Page 24: Calibrating Wave C's Ring Modulator

    Next using another 1/4” cable, connect the WAVE B output jack to the AUDIO IN jack on the XS. Switch the WAVE C control to its “ext” setting and adjust the oscillo- scope to display 1 period of the waveform across the horizontal width of the display.
  • Page 25 Step 12, WAVE C Ring Modulator Calibration: First adjust for minimum amount of signal with TR13 WAVE C when set to EXT, and WAVE B is connected Sine wave doubling in frequency when WAVE C is in to the AUDIO IN jack the RING setting...

  • Page 26: Calibrating Envelope

    Step 13, Calibrating Envelope 1: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, fully insert one end into the ENV1 +/- output jack and connect the other end to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector). Controls shown in red must be set to the settings as indi- cated.
  • Page 27 Step 13, Envelope 1 Calibration: Note the lowest portion of the positive polarity When looking at the negative polarity envelope make And set this as your reference sure it’s lowest portion lines up with your reference...

  • Page 28: Calibrating The Filter Pitch Tracking

    Step 14, Calibrating the Filter Pitch Tracking: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the FILTER OUT output jack to an oscilloscope (probe will con- nect to the tip, ground terminal will connect to the shield of the connector). Controls shown in red must be set to the settings as indicated.
  • Page 29 Step 14, Filter Pitch Tracking Calibration: Playing note C1 on MIDI keyboard Playing note C2 on MIDI keyboard Playing note C3 on MIDI keyboard...

  • Page 30: Calibrating The Filter Cutoff Range

    Step 15, Calibrating the Filter Cutoff Range: Using a 1/4” cable, connect the FILTER OUT output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector). Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure. Set the CUTOFF control in the Filter section to the 9 O’clock position.
  • Page 31 Step 15, Filter Cutoff Range Calibration: Cutoff frequency at the 9 O’clock position Cutoff frequency turned fully clockwise...

  • Page 32: Calibrating The Overdrive Noise Gate

    Step 16, Calibrating the Overdrive Noise Gate: Using a 1/4” cable, connect the FILTER OUT output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector). Con- trols shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure. Set the CUTOFF control in the Filter section to it’s mid position.
  • Page 33 Step 16, Overdrive Noise Gate Calibration: Filter output set just below self resonance Overdrive control set fully clockwise and trimmed...

  • Page 34: Calibrating The Amplifier

    Step 17, Calibrating the Amplifier: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to an oscilloscope (probe will connect to the tip, ground terminal will connect to the shield of the connector). Controls shown in red must be set to the settings as indicated.
  • Page 35 Step 17, Amplifier Calibration: Main output adjusted for minimum transient pulses...

  • Page 36: Testing The Glide Time

    Step 18, Testing the Glide Time: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 37: Testing The Cv In

    Step 19, Testing the CV IN: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Using another 1/4” cable connect the CV IN jack to the CV OUT jack. Controls shown in green will need to be adjusted for this procedure.

  • Page 38: Testing Oscillator A's Fine Tune Control

    Step 20, Testing Oscillator A’s Fine Tune Control: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Controls shown in red must be set to the settings as indicated.

  • Page 39: Testing Oscillator A's Wave Control

    Step 21, Testing Oscillator A’s WAVE Control: Using a 1/4” cable, connect the WAVE A jack to your oscilloscope. Using another 1/4” cable connect the WAVE B jack to the AUDIO IN jack. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure. Rotate the WAVE A control clockwise through its settings.

  • Page 40: Testing Oscillator A's Modulation Amount

    Step 22, Testing Oscillator A’s Modulation Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Using another 1/4” cable connect the LFO OUT jack to the OSC MOD jack. If you wish to view the modulated waveform, use another 1/4” cable to connect the WAVE A jack to your os- cilloscope.

  • Page 41: Testing Oscillator B's Wave Control

    Step 23, Testing Oscillator B’s WAVE Control: Using a 1/4” cable, connect the WAVE B jack to your oscilloscope. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure. Rotate the WAVE B control clockwise through its settings.

  • Page 42: Testing Oscillator B's Modulation Amount

    Step 24, Testing Oscillator B’s Modulation Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Using another 1/4” cable connect the LFO OUT jack to the OSC MOD jack. If you wish to view the modulated waveform, use another 1/4” cable to connect the WAVE B jack to your os- cilloscope.

  • Page 43: Testing Oscillator B's Env 1 Sweep Amount

    Step 25, Testing Oscillator B’s ENV 1 Sweep Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. If you wish to view the modulated waveform, use another 1/4”...

  • Page 44: Testing Oscillator B's Frequency Control

    Step 26, Testing Oscillator B’s Frequency Control: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 45: Testing Oscillator B's Frequency Sync

    Step 27, Testing Oscillator B’s Frequency Sync: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MAIN OUT output jack to your audio system. If you wish to view the modulated waveform, use another 1/4”...

  • Page 46: Testing The Mod W Out

    Step 28, Testing the MOD W OUT: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the MOD W OUT jack to your oscilloscope. Move the mod wheel controller of your MIDI keyboard through its entire range, and you should see the voltage at the MOD W OUT jack vary from 0 to approximately +10...

  • Page 47: Testing The Vel Out

    Step 29, Testing the VEL OUT: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the VEL OUT jack to your oscilloscope. Play notes at varying velocities (from soft to hard) on your MIDI keyboard, and you should see the voltage at the VEL OUT jack vary from approximately 0 to +10 volts.

  • Page 48: Testing The Lfo

    Step 30, Testing the LFO: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the LFO OUT output jack to your oscilloscope. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 49: Testing The Filter Types

    Step 31, Testing the FILTER TYPE: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the FILTER OUT jack to your oscilloscope. Using another 1/4” cable connect the MAIN OUT jack to your audio system. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 50: Testing The Filter Modulation Amount

    Step 32, Testing the Filter Modulation Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the FILTER OUT jack to your oscilloscope. Using another 1/4” cable connect the MAIN OUT jack to your audio system. Using another 1/4” cable, connect the LFO OUT jack to the FILTER MOD jack. Controls shown in red must be set to the settings as indicated.

  • Page 51: Testing The Filter Env 1 Sweep Amount

    Step 33, Testing the Filter’s ENV 1 Sweep Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the FILTER OUT jack to your oscilloscope. Using another 1/4”...

  • Page 52: Testing The Filter Overdrive

    Step 34, Testing the Filter’s Overdrive: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the FILTER OUT jack to your oscilloscope. Using another 1/4” cable connect the MAIN OUT jack to your audio system. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 53: Testing The Filter Velocity Amount

    Step 35, Testing the Filter’s Velocity Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the LFO OUT jack to the VEL IN jack. Using another 1/4” cable connect the MAIN OUT jack to your audio system.

  • Page 54: Testing The Amplifier Velocity Amount

    Step 36, Testing the Amplifier’s Velocity Amount: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the LFO OUT jack to the VEL IN jack. Using another 1/4” cable connect the MAIN OUT jack to your oscilloscope.

  • Page 55: Testing The Envelope 2 Shapes

    Step 37, Testing the Envelope 2 Shapes: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the LFO OUT jack to the VEL IN jack. Using another 1/4” cable connect the MAIN OUT jack to your oscilloscope.

  • Page 56: Testing The Gate In

    Step 38, Testing the GATE IN: Using a 1/4” cable, connect the LFO OUT jack to the GATE IN jack. Check to see that the LED in the ENVELOPE 1 section is blinking at the same rate and time as the LFO LED is.

  • Page 57: Testing The Gate Out

    Step 39, Testing the GATE OUT: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable, connect the GATE OUT jack to your oscilloscope. Play notes on your MIDI keyboard as you monitor the level of the GATE OUT signal. When no note is being played, this GATE OUT signal should be at 0 volts. When a...

  • Page 58: Testing The Amp In

    Step 40, Testing the AMP IN: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable connect the WAVE B jack to the AMP IN jack. Using a 1/4” cable, connect the MAIN OUT jack to your audio system or oscilloscope.

  • Page 59: Testing The Main Out

    Step 41, Testing the MAIN OUT: Connect the MIDI Out of your MIDI keyboard to the MIDI In jack of the XS. Using a 1/4” cable connect the MAIN OUT jack to your oscilloscope. Controls shown in red must be set to the settings as indicated. Controls shown in green will need to be adjusted for this procedure.

  • Page 60: Trimmer Location Reference

    These hidden trimmer locations should only be recalibrated by Future Retro or a qualified technician. If you do not have the ability to do the procedures in this manual, please contact Future Retro to arrange for us to do the procedure for you.

Table of Contents