Synthetic Sound Labs - Model 3650 Digital Sequencer

Synthetic Sound Labs - Model 3650 Digital Sequencer

  • $495.00

We have collaborated with our friends at Division-6 to bring you this handy 3650 Digital Sequencer in Buchla format.

The 3650 gives you standard CV and pulse out, plus an ACC out (Accent? Accessory?)  Use the ACC output to open up a filter, enable a glide, trigger a drum, or whatever you can think of.

It has its own internal clock to get you up and running in a hurry, but you can connect an external clock if you need greater control of tempo or want to sync with other devices.

The module can store up to 5 songs of 16 sequences each, and 7 sequences of up to 16 steps each.  Wow!


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


  • 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)
  • CV OUT


  • CV OUT covers 5 octaves
  • 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…


You can also cascade multiple 3650’s to create longer, more complex and syncopated patterns.  Why would you need more than one sequencer?

  • More sequencers = more steps
  • Use one for playing notes and the other for transposing those notes
  • Can be used as a clock divider
  • Run in parallel for multiple CVs / triggers

The two sequencers will run completely independently, or you can daisy-chain them using the START IN / END OUT jacks to create sequences of any length.



- 12 Keyboard buttons for Note selection (w/LEDs)
- 2 Octave selection buttons (w/LEDs)
- 2 Step / Tempo selection buttons
- 1 Run / Pause button (w/LED)
- Rest / Loop / Accent buttons (w/LEDs)
- 1 Reset button


- 16 Orange Step LEDs
- 1 Clock LED


- Clock Input
- Start Input


- CV Out - 0 to ~6V
- Pulse Out - 0 to ~5V
- Accent Out - 0 to ~5V
- End Out - 0 to ~5V


- Current draw: +15V @ 16 ma
- 200e standard connector with flying leads


Width - 200e standard
Depth - 1.25" behind panel