Dr. Rhythm


A Fast and Easy Solution for Professional-Sounding Drums.

With the DR-3 Dr. Rhythm, guitarists and songwriters can add incredible-sounding drums to their music. This ultra-affordable drum machine includes some of BOSS’ best acoustic and electronic drum kits and a selection of bass sounds. Great for jamming, the DR-3’s Rhythm Progressions and multiple variations make it easy to create a realistic-sounding drum track for any style of music. And with Total Sound Control, you can tweak your kits to perfection.

New Rhythm Progressions for All-Out Jams

If you want to spend less time programming and more time jamming, you’ll love the DR-3’s Rhythm Progressions. Simply choose from 100 Preset styles and use the eight panel buttons to switch between different sections of your song. Up to three variations can be selected for each Intro, Verse, Fill and Ending, so your drum tracks won’t get monotonous.

Easy Sound Shaping and Footswitch Control

BOSS’ new TSC (Total Sound Control) lets you change the overall sound of a drum kit with specialized effects. Use the Sound Shape function to adjust the 3-band compression and parametric EQ, or add some spaciousness with the Ambience effect. An optional footswitch can be used to control anything from Intro/Start and Ending/Stop to Verse change, Variation On/Off, Loop On/Off and more. Battery power lets you take the DR-3 just about anywhere.

User Style: 100, Preset Style: 100 * 11 patterns for a style
User: 100, Song Length: Max. 250 patterns for a song
TSC (Total Sound Control)
Preset Patch: 8, User Patch: 8 Preset Patch: 8, User Patch: 8
Max. Polyphony
12 voices
Drum and perc: 120, Bass: 12
96 per quater note
20 to 260 bpm
Recording Method
13 (Velocity-sensitive)
Backlit LCD (16 characters x 2 lines)
Output Jack: L, R (RCA Phono type), L(PHONES), R(MONO) (1/4-inch phone type), Foot Switch Jack (Stereo 1/4-inch phone type), MIDI IN Connector, DC IN (AC Adaptor Jack)
Power Supply
DC9V: Dry Battery (R6/LR6 (AA) type) x 6, AC Adaptor (PSA-series)
Power Consumption
200 mA
* Expected battery life under continuous use: approx. 5 hours (This figure will vary depending on the actual conditions of use.)
Dry Battery (Alkaline LR6 (AA) type) x 6, Owner's Manual, Roland Service (Information Sheet)
AC Adaptor: PSA Series, Foot Switch: FS-5U, Foot Switch Cable: Roland PCS-31L
Size and Weight
213 mm
8-7/16 inches
185 mm
7-5/16 inches
53 mm
2-1/8 inches
710 g
1 lbs. 10 oz.
*The specifications are subject to change without notice.




If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner's Manuals

Support Documents

  • BOSS Product Catalog 2008

    Forging the Future - Innovation for Creative Inspiration
    BOSS forges into 2008 with an awe-inspiring lineup of effects, digital studios, and accessories.

  • DR-3 TurboStart

    TurboStart for the DR-3