Effects and tempo synchronization 331

DM2000—Owner’s Manual
Effects and tempo synchronization
Some of the DM2000’s effects allow you to synchronize the effect with the tempo. There are two such types of effect; delay-type
effects and modulation-type effects. For delay-type effects, the delay time will change according to the tempo. For modulation-type
effects, the frequency of the modulation signal will change according to the tempo.
•Parameters related to tempo synchronization
The following five parameters are related to tempo synchronization.
1) SYNC 2) NOTE 3) TEMPO 4) DELAY 5) FREQ.
SYNC:............................ This is the on/off switch for tempo synchronization.
NOTE and TEMPO:.....These are the basic parameters for tempo synchronization.
DELAY and FREQ.:...... DELAY is the delay time, and FREQ. is the frequency of the modulation signal. These directly affect
the way in which the effect sound will change. DELAY is relevant only for delay-type effects, and
FREQ. is relevant only for modulation-type effects.
•How the parameters are related
Tempo synchronization uses TEMPO and NOTE to calculate a value that will be the basis for the tempo, and continues making
adjustments so that this tempo basis stays essentially the same as the DELAY (or FREQ.). This means that when TEMPO, NOTE,
and DELAY (or FREQ.) are synchronized, and you change any of these values, the other parameters will be re-set in order to
maintain the correct relationship. The parameters that are re-set and the calculation method(*a) used are as follows.
If you turn SYNC on → NOTE will be set
If you edit DELAY (or FREQ.) → NOTE will be set
In this case, the NOTE value is calculated as follows.
NOTE = DELAY (or FREQ.)/(4 x (60/TEMPO))
If you edit NOTE → DELAY (or FREQ.) will be set
In this case, the DELAY (or FREQ.) value is calculated as follows.
DELAY (or FREQ.) = NOTE x 4 x (60/TEMPO)
If you edit TEMPO → DELAY (or FREQ.) will be set
In this case, the DELAY (or FREQ.) value is calculated as follows.
DELAY (or FREQ.) = original DELAY (or FREQ.) x (previous TEMPO/new TEMPO)
Example 1: When SYNC=ON, DELAY=250 ms, TEMPO=120, you change NOTE from 8th note to quarter note
DELAY= new NOTE x 4 x (60/TEMPO)
= (1/4) x 4 x (60/120)
= 0.5 (sec)
= 500 ms
Thus, the DELAY will change from 250 ms to 500 ms.
Example 2: When SYNC=ON, DELAY=250 ms, NOTE=8th note, you change TEMPO from 120 to 121
DELAY= original DELAY x (previous TEMPO/new TEMPO)
= 250 x (120/121)
= 247.9 (ms)
Thus, the TEMPO will change from 250 ms to 247.9 ms.
*a Rounded values are used for the calculation results.
•Ranges of the NOTE and TEMPO values
The ranges of the NOTE and TEMPO values are limited by the ranges of the DELAY or FREQ. values. You cannot set NOTE or
TEMPO values that would cause DELAY or FREQ. to exceed their maximum possible values when synchronized to tempo. This
limitation also applies even when SYNC is OFF.
•Special characteristics of the TEMPO parameter
The TEMPO parameter has the following characteristics that are unlike other parameters.
•It is a common value shared by all effects
•You cannot stored it to or recall it from the Effects Library. (You can store it to and recall it from a Scene.)
This means that the TEMPO value may not necessarily be the same when an effect is recalled as when that effect was stored. Here
is an example.
Store the effect: TEMPO=120 → Change TEMPO to 60 → Recall the effect: TEMPO=60
Normally when you change the TEMPO, the DELAY (or FREQ.) will be re-set accordingly. However if the DELAY (or FREQ.)
were changed, the effect would sound differently when recalled than when it was stored. To prevent the effect from changing in
this way between store and recall, the DM2000 does not update the DELAY (or FREQ.) value when an effect is recalled, even if
the TEMPO is no longer the same as when that effect was stored.
* The NOTE parameter is calculated based on the following values.
= 1/48
= 2/1
= 1/16= 1/24 = 1/12
= 3/4= 3/16 = 1/2
= 3/32 = 1/6
= 1/4
= 1/8
= 1/1= 3/8