Synthesis Technology MOTM-650 User Manual Download

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MOTM-650 4 Channel

MIDI

CV Converter

User’s Guide

Firmware Version 1.4

Synthesis Technology

6625 Quail Ridge Dr.

Fort Worth, TX 76180

(817) 281-7776

www.synthtech.com

October, 2011

Summary of Contents for MOTM-650

Page 1: ...MOTM 650 4 Channel MIDI CV Converter User s Guide Firmware Version 1 4 Synthesis Technology 6625 Quail Ridge Dr Fort Worth TX 76180 817 281 7776 www synthtech com October 2011...

Page 2: ...to the two analog to digital converters ADCs The four main CV outputs are provided by an AD5541 16 bit ADC Its output is fed into a DG408 4 channel analog demultiplexer which provides four control vo...

Page 3: ...SYNTHESIS TECHNOLOGY PAGE 3 MOTM 650 USER S GUIDE WWW SYNTHTECH COM FRONT PANEL The MOTM 650 s front panel looks like this...

Page 4: ...change step to a lower level function or confirm that a changed setting is desired DEC INC The DECREMENT and INCREMENT buttons are used to step through the menu options and change settings In some con...

Page 5: ...ith INC or DEC select Global Settings and press ENTER The LCD will show VGrpType 4 Get comfortable scrolling through the Global Settings by using INC or DEC and when finished press ESC This backs the...

Page 6: ...nstead of pressing ENTER press ESC instead The display will show Clock MIDI Clk This allows the user to back out of a change before it becomes permanent and the setting will be set back to whatever it...

Page 7: ...unctions such as dumping patches storing patches etc They are not settings as in global voice group or arpeggiator categories rather just instructions to perform a specific action Note Settings may ap...

Page 8: ...ogical grouping of the MOTM 650 s four voices allowing each voice to either share control settings or have separate settings depending on how the voices are being used For example if you have several...

Page 9: ...ts when they are set to Trigger mode The width can be set to 1 10 or 100 ms with an accuracy of 2 ms Priority LastNote The Solo Note Priority setting controls which note is voiced when the Voice Alloc...

Page 10: ...ng data The default tunings are as follows Name Memory Description 12 Tone 1 12 Tone Equal Temperament HrmA1 60 2 Harmonic Series HrmA1 12T 3 Carlos Harmonic 12 Tone Meantone 4 Meantone Temperament 1...

Page 11: ...s released Status Show On The System Status setting turns the display of status updates On or Off On When system status is On status updates are shown whenever the LCD is idle for a few seconds The st...

Page 12: ...channel setting notes sent to the Global Control MIDI Channel will only be played if there is a voice group whose MIDI Channel is set to that same channel Patch RX Disabled The Patch Reception setting...

Page 13: ...per clock pulse and is best used when the clock source is irregular MIDI Clk Transmit The MIDI Clock Output setting is only displayed when the Clock Source is set to Internal or to External Regular Tr...

Page 14: ...le we ll assume you want to control a single VCO Set the MOTM 650 as follows Go to the Global Settings menu and change the Voice Group Type VGrpType to 4 single group 4 voices per group Press ESC to r...

Page 15: ...oice groups can be assigned to the same MIDI Channel Change Voice Group 1 s channel to the same as Voice Group 2 s channel Play notes Watch voice 1 3 turn on simultaneously and 2 4 turn on simultaneou...

Page 16: ...Velocity Trigger Output is set to S Trigger mode then the VEL output won t retrigger Only one voice is used in Solo mode the first voice in the group This the only allocation mode that doesn t use all...

Page 17: ...ng that notes are assigned to voices in a predictable manner This can be used with the Glide feature to make a super cool polyphonic portamento sound Poly 2 like Poly 1 does nothing when more notes ar...

Page 18: ...note the CV output changes voltages nearly instantaneously When glide is enabled the voltage changes a Constant Rate or Constant Time depending on which Glide Type is selected This allows the pitch t...

Page 19: ...V glides from one note to another The rate follows an exponential curve from 60 562 cents second to 16898 837 cents second with 128 steps This menu only appears when the Glide Type is set to Constant...

Page 20: ...played legato Remember though that in some cases a new note will not cause a trigger pulse as described in the Voice Allocation Mode section VG1 Aux1 CC1 ModW The Auxiliary Output setting controls ho...

Page 21: ...ty option will output a CV that corresponds to the value of the current Note On s velocity ClkPulse The Clock Pulse option will output a full scale pulse that is synchronized with the arpeggiator s cl...

Page 22: ...other arpeggiator menu items will be displayed when the arpeggiator is off VoxGrp1 The Voice Group option plays all arpeggiated notes on the voice group selected The global Voice Group Type option det...

Page 23: ...notes are played and held C E D F A B PingPong mode will arpeggiate them as C B E A D F Random Random mode scans the notes randomly Note that the Note Order has no effect on Random mode For example C...

Page 24: ...wd Rev The Forward Reverse option scans forward to the last note then reverses direction until the first note is scanned again then repeats For example C E D F A B will be arpeggiated in Normal mode a...

Page 25: ...n arpeggiates 1 8 notes if the Clock Source is set to Internal Clock or MIDI Clock and plays a note for every clock pulse if set to External Regular Mult 1 5 The Multiply by 1 5 option arpeggiates 1 8...

Page 26: ...y 3 setting arpeggiates 1 2 triplets or 1 note per 3 clocks depending on the source Div 2 The Divide by 2 option arpeggiates 1 4 notes or 1 note per 2 clocks depending on the source Div 1 5 The Divide...

Page 27: ...NC button will step through the 32 internal memories Pressing ENTER will load that patch into the current patch memory and the LCD will display Load Complete Save_ Patch Selecting the Save Patch actio...

Page 28: ...umped like so Dumping 1 When done it will display Dump Complete Dump All Patches can be used with an external sequencer or patch librarian to back up the MOTM 650 s internal settings Dump Tuning Selec...

Page 29: ...1 Volt 2 Volts S Trigger Pulse Width 10 ms 100 ms 1 ms Solo Note Priority Last Note Low Note High Note Tuning Table 12 Tone Equal Temperament Harmonic Series Carlos Harmonic 12 Tone Meantone Temperame...

Page 30: ...DI Clock 6 External Regular 5 6 External Irregular 5 MIDI Clock Output Transmit Off 4 Clock rate 60 238BPM 120BPM Voice Group 1 Settings MIDI Channel 1 16 1 Voice Allocation Mode Solo Solo Rotate Solo...

Page 31: ...8 Volts 1 Volt 2 Volts 1 2 Auxiliary Output 2 1 2 Auxiliary Output 2 Scale 1 Auxiliary Output 3 1 Auxiliary Output 3 Scale 1 Auxiliary Output 4 1 Auxiliary Output Scale 2 Voice Group 2 Settings 3 Voi...

Page 32: ...TECH COM Reverse Forward Reverse Reverse Forward 6 9Clock Multiplier Divisor 1X 1 5X 2X 4X 4 3 2 1 5 Arpeggiator 2 Settings Module Actions Load Patch Patch 1 32 1 Save patch Patch 1 32 1 Load Default...

Page 33: ...4 1 4 Tone Equal Temperament 24 notes per octave equally spaced 24root2 intervals Mexican composer Julian Carillo used this for custom built pianos in the early 20th century 5 19 Tone Equal Temperamen...

Page 34: ...2 3 2 7 4 7 4 15 8 13 Yamaha Just Major C When Yamaha decided to put preset microtunings into their FM synth product line they selected this and the following tuning as representative just intonations...

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