Boss Dr.Rhythm DR-550 Owner's Manual page 69

[2]Creation of Complex Rhythm Patterns
5. Muting
On the DR-550, sounds having a long decay can be muted if desired. For example, say
you are using sound A. You can change the Assign Type for the Key Pad to which itis assigned
to EXC. Next you could choose any convenient Key Pad (call it B) and set its EXC number
to the same one as A, and set the Level to "0". Thereafter, when you tap A, and after it tap
B, the sound of A will be muted. This technique could be employed for a gated snare, or
to mute a crash cymbal.
[Example]
(SASH) CRSH OHHT) (РЕН
Exc? LEVEL 0 Exc 2 Exc 2
Ехс 1
(KCK1) CSNR1)
y last step : 16
CRSH po у ММ M 4. scole 12345878 5 10111273141516
| exes 8 шинииннавэ
CRSH T TRE ЭКИ) пари меры H HH
(Level:0)
om AR o t
| ЕХС2
SNR1 касса quA. а
(1) Маке the Key Pad assignments shown above (Refer to Section Six,
"[1] Key Pad Settings"; р. 54).
(2) Following the notation, enter the data (Refer to Section Three, "(1
Basic Procedures"; p. 26).
You can thus mute the cymbal or the hi-hat. 69