Boss Audio Systems BR-900CD User Manual

The “Rhythm” is a dedicated Rhythm track that can not only 
play back Rhythm sounds as a guide during recording, you 
can also use it to play internal Rhythm patterns and original 
user-created Rhythm patterns and to play and record these 
patterns as your own Rhythm part performances.

The Rhythm features two modes, “Pattern mode” and 
“Arrangement mode.”

You can perform patterns and create your own original 
patterns.

You can perform arrangements and create your own original 
arrangements.

These are phrases consisting of from one to several measures 
of drum performance.

These are internal patterns stored in the BR-900CD that have 
already been prepared for use. There are 327 patterns 
categorized by musical genre, such as “rock” and “jazz.”

Preset patterns include prepared patterns for intros, verses, 
fill-ins, and endings (you can confirm the type by looking at 
the characters at the end of the pattern name).

(Example)

ROCK1-IN (Intro)

ROCK1-V2 (Verse2)

ROCK1-V1 (Verse 1)

ROCK1-F2 (Fill 2)

ROCK1-F1 (Fill 1)

ROCK1-E (Ending)

Music patterns to be placed at the beginning of a song.

Music patterns to make up the main part of the song. “1” are 
basic patterns and “2” are more advanced versions of “1.”

Music patterns to be used as phrases to connect different 
sections of a song. You can select either “1” or “2” depending 
on the form that will follow the fill.

Music patterns to be placed at the ending of a song.

These are patterns whose data is rewritable, and up to 100 
different patterns for each song can be stored on memory 
cards.

fig.03-101a

Arrangements are sequences of patterns arranged in the 
order they are performed and with the tempo set.

fig.03-102

These are internal arrangements stored in the BR-900CD that 
have already been prepared for use. There are 50 patterns 
categorized by musical genre, such as “rock” and “jazz.”

In each Preset arrangement (except for Metro 4/4), a BREAK 
(rest) of three measures is played after the END (ending), and 
then the V1 (verse 1) is played repeatedly.

These are arrangements whose data is rewritable, and up to 5 
different arrangements for each song can be stored on 
memory cards.

fig.03-102a