KnowledgeBase | K2600 | Song Mode/Sequencing


Syncing a Drum Loop (using Tempo Control Source)

Question:

How can a drum loop be synced to the sequencer and/or external MIDI clock?

Answer:

If you have a K2600/2661 or a K2500 with v4 or later of the operating system, you will have a Control Source called Tempo. This Control Source uses the K2's own internal clock or an external MIDI clock (depending on the setting of the 'Clock' parameter on the SongMode:MISC page - more info below) as a modulation source.

One possible application for the Tempo control source would be syncing a sampled drum loop to sequencer clock. Here is the basic procedure:

  1. Choose/create a sampled drum loop program.
  2. Edit the program, go to the Pitch page, and set Src1 = Tempo, and Depth = 7200ct**.
  3. EditProg:PITCH             <>Layer:1/1  
    Coarse:0ST          Src1  :Tempo
    Fine  :0ct          Depth :7200ct       
    FineHz:0.00Hz       Src2  :OFF
    KeyTrk:0ct/key      DptCtl:OFF
    VelTrk:0ct          MinDpt:0ct
                        MaxDpt:0ct
    <more  ALG    LAYER  KEYMAP PITCH  more>
    
  4. Still on the Pitch page, set the Coarse/Fine tuning based on the drum loop's original tempo. If the loop was originally 120BPM, set the Coarse tuning to -60ST.
    EditProg:PITCH             <>Layer:1/1  
    Coarse:-60ST        Src1  :Tempo
    Fine  :0ct          Depth :7200ct
    FineHz:0.00Hz       Src2  :OFF
    KeyTrk:0ct/key      DptCtl:OFF
    VelTrk:0ct          MinDpt:0ct
                        MaxDpt:0ct
    <more  ALG    LAYER  KEYMAP PITCH  more>
    
    For other tempos, you may need to tune it while listening to the click from your sequencer, until the sampled loop stays in time with the sequencer tempo. Keep in mind that you will of course be changing the pitch of the sounds along with the speed of the sample playback.

** As an explanation, the Depth of 7200ct is six octaves, corresponding to six doublings of tempo from 3.75BPM to 240BPM (the system limits).

TIP: Internal vs External Clock Sync Options

When syncing to its own internal clock (Clock:Int)...

SongMode:MISC  Events:375k   STOPPED    
RecMode :Linear Quant:OFF   CountOff:1
PlayMode:Loop   Grid :1/16  Click   :Rec
KeyWait :Off    Swing:0%    ClickCh :16
Locate  :  1:1  Sync :Off   ClickPrg:198
AutoIn  :  1:1  Clock:Int   ClickKey:C 4
AutoOut :  1:1  Tempo:Auto  ClickVel:100
Record  Play   Stop   New   In/Out MAIN 

...the master clock tempo (bpm) is set by the 'Tempo' field on the SongMode:MAIN page.

SongMode:MAIN  Events:375k   STOPPED    
CurSong:1 NewSong            Tempo:120  
RecTrk :1    Vol:127 Pan:64  Mode :Merge
Program:1 Concert Piano 1    Locat:  1:1

Track  :R - - - - - - - - - - - - - - -
Channel:1 2 3 4 5 6 7 8 9 10111213141516
Record  Play   Stop  Erase  MISC  MIXER 

When syncing to an external clock (Clock:Ext), the clock source is derived from the MIDI Clock signal being fed into the K2's MIDI IN port.

SongMode:MISC  Events:375k   STOPPED    
RecMode :Linear Quant:OFF   CountOff:1
PlayMode:Loop   Grid :1/16  Click   :Rec
KeyWait :Off    Swing:0%    ClickCh :16
Locate  :  1:1  Sync :Off   ClickPrg:198
AutoIn  :  1:1  Clock:Ext   ClickKey:C 4
AutoOut :  1:1  Tempo:Auto  ClickVel:100
Record  Play   Stop   New   In/Out MAIN 


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