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Copyright 2020 by Synthetic Sound Labs LLC  -  3650 Digital Sequencer 

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3650 Digital Sequencer 

 

The SSL 3650 Digital Sequencer is a very flexible and approachable 
Buchla format sequencer.  You can easily start out with the basics 
without being intimidated, and then begin to explore its many 
nuances and features as you learn the power 

of the 3650’s modes.

 

Many of the buttons on the 3650 have multiple functions and we 
have tried extremely hard to provide maximum flexibility, while 
avoiding 

“menu

-

diving” syndrome.  

 

Features 

 

CV OUT covers 5 octaves, and can be tuned using front-accessible trim pot 

 

Sequences can be set to any length up to 16 steps by using LOOP feature 

 

Setting a step to REST holds previous pitch and doesn’t fire 

PULSE out 

 

Setting a step to SLUR changes to the new CV and doesn’t fire the PULSE out

 

 

In Standby mode, sequencer can be used as a tiny keyboard without altering programmed sequences 

 

7 sequence memories with up to 16 steps per sequence.  

 

5 song memories string up to 16 sequences together 

 

Live transpose 

 

Much more…

 

Inputs 

 

CLOCK IN (External clock input) 

 

START IN (Expansion input; Starts sequencer back at step 1. Use for daisy-chaining multiple units) 

Outputs 

 

END OUT (Sends pulse when sequencer goes past last step. Use for daisy-chaining multiple units) 

 

ACC OUT (Can be programmed on or off in each sequence step) 

 

PULSE OUT 

 

CV OUT 

 

Summary of Contents for SSL 3650

Page 1: ... accessible trim pot Sequences can be set to any length up to 16 steps by using LOOP feature Setting a step to REST holds previous pitch and doesn t fire PULSE out Setting a step to SLUR changes to the new CV and doesn t fire the PULSE out In Standby mode sequencer can be used as a tiny keyboard without altering programmed sequences 7 sequence memories with up to 16 steps per sequence 5 song memor...

Page 2: ... LOOP ACC In addition to standard notes you can also program a REST LOOP or ACC into a step REST Replaces the selected note A REST step holds the previous note and does not fire the gate LOOP Replaces the selected note A LOOP step sets the sequence back to step 1 You can use this to create any length sequence you want For example if you only want steps 1 13 in your sequence you will make step 14 a...

Page 3: ...nal The 3650 includes a handy but somewhat limited internal clock which is activated when the sequencer is first powered on or after a soft reset For greatest flexibility you may wish to consider using an external clock via the CLOCK IN jack When an external clock pulse is received the internal clock is automatically disabled To reactivate the internal clock press and hold the RESET button for abo...

Page 4: ...song memories available which can be used to string together up to 16 sequences in any order If the entire row of black keys is lit or flickering you are in SONG mode The steady LED indicates the currently selected song Each song step contains one sequence When running and the current sequence has completed the sequencer will advance to the next song step and play the sequence it contains To selec...

Page 5: ...uttons for about 1 second the note LEDs will flash to let you know when the copy has been performed The copy always goes from the FIRST SECOND button you press You can t copy songs to sequences or sequences to songs Clearing a Song or Sequence All the songs and sequences in the sequencer always exist so generally if you want to wipe out an existing song or sequence you can just modify them or prog...

Page 6: ...timings This works best with steady clocks Mode 1 is usually best to use for rapidly changing clock rates 1X MODE Purpose Normally when 1X mode is disabled and the playing a sequence reaches stage 16 or whichever LOOP step you have set it will loop back to step 1 and begin playing the sequence again Enabling 1X mode is useful when you are cascading multiple sequencers for example as explained unde...

Page 7: ...uencer without having to press STEP UP in between each step making initial programming of a sequence easier Default Disabled Off Operation When enabled and you are programming a sequence entering a NOTE or REST or LOOP into a step will automatically advance to the next step To toggle AUTO ADVANCE mode press and release both yellow STEP TEMPO AUTO ADV buttons The STEP 16 LED will blink twice when e...

Page 8: ...rd On Root key in center of F note keyboard On Root key at top B note of keyboard Off Disabled The LOOP LED will flash twice for each ON mode along with the selected root key and will flicker when LIVE TRANSPOSE mode has been turned off When LIVE TRANSPOSE is ON instead of the usual current note display the NOTE and OCTAVE LEDs will display the transpose status Steady NOTE LED Root key Blinking NO...

Page 9: ...aximum transposeability we recommend programming your sequences in the middle octaves Also if you use the RUN button to pause the sequencer then start it again whatever transpose amount you set will be retained If you press RESET to go back to the beginning of the sequence then the transpose amount will be cleared LIVE EDIT Normally when a sequence is running the NOTE buttons do not do anything Wi...

Page 10: ... ACC and hold for 1 second The ACC LED will BLINK twice to let you know that CLOCK OUT is enabled and will FLICKER when it has been disabled Important Notes ACC will no longer be sent out this jack but it can still be programmed into sequences The ACC jack will still operate normally when using an external clock CHANGE ON CLOCK MODE Purpose Normally if the 3650 is running and you select a new song...

Page 11: ...a voltmeter to the CV OUT jack of the sequencer you want to calibrate 2 Press RESET to make sure the sequencer is in Ready or Program mode either will work 3 Press the OCTAVE UP button a few times to set the keyboard to the highest octave OCTAVE UP LED ON steady 4 Press the NOTE C button 5 Adjust the trim pot until the meter reads as close to 4 800V as you can get it 6 Check the C notes on the low...

Page 12: ...y Synthetic Sound Labs LLC 3650 Digital Sequencer Page 12 Copyrights Trademarks This document is copyright 2020 by Synthetic Sound Labs LLC Firmware by Division 6 Buchla is a trademark of Buchla Associates Berkeley CA ...

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