Backing Module

A Band in a Briefcase

  • USB
  • XGlite
  • GS
  • GM2
  • V-LINK


(Jan. 21,2013)
BK-7m System Program Version 1.07 Now Available!

(Jan. 21, 2013)
Lyrics Viewer Now Available on the App Store!

(Jan. 21, 2013)
User Scale Now Available on the App Store!

(Jan. 21, 2013)
BK Partner Now Available on the App Store!

A Band in a Briefcase

Add a world-class backing band to your show with the new BK-7m, a state-of-the-art module that packs an interactive band into a sleek, slim package. No bigger than a book, the BK-7m is a dream machine for the entertaining artist or solo musician who needs a backing band onstage, in the studio, or at home. With hundreds of great Tones, Music Styles, and rhythms onboard — all quickly accessible with one-touch buttons — the BK-7m will make you sound like a pro ensemble onstage. Choose from the library of built-in styles or play your own music files directly from USB for play-along accompaniment. You can even record your performances directly to USB memory for distribution and archiving.

  • - Portable backing module compatible with MIDI-capable pianos, keyboards, accordions, organs
  • - 1,000-plus tones, 57 drum kits, 128-voice polyphony
  • - Over 400 high-quality music styles, each with four one-touch settings
  • - Over 900 Music Assistants covering every musical genre
  • - SMF and audio file playback via onboard USB connector
  • - Audio recording in WAV format directly to connected USB storage device
  • - Cover function for SMFs and Music Styles
  • - Composite Video Out to display Lyrics and/or Chord Symbols on external display
Relevant product

Sound Generator

The BK-7m is powered by a state-of-the-art Roland sound engine, packed with over 1,000 great Tones and dozens of drum and percussion kits. The module is able to handle 128 voices simultaneously, and is compatible with a variety of voicing formats, including GM2, GS, and XG Lite. Feed the BK-7m a quality Standard MIDI File, buckle up, and get ready for a great-sounding band. You can also use it as a high-quality sound module for a MIDI-compatible instrument such as a digital piano, V-Accordion, organ or guitar.

Creative Control

In addition to playing MIDI Files with its internal sound generator, the BK-7m can also play and manipulate audio files. Play MP3 or WAV files via USB and use the onboard controls to change key signature and tempo to best suit your vocal range or performance style. You can also use the BK-7m's Center Cancel feature to minimize the vocals from pre-existing songs to create instant karaoke-style sing-along tracks.

USB Compatibility

To expand the capabilities of the BK-7m, a USB port is provided for connecting to industry-standard USB storage devices such as a USB key or self-powered USB hard disk for playing and modifying/saving files. You can also use the USB port to record your performances as audio files (WAV, 44.1KHz/16-bit linear format) on a USB storage device.

Video Compatibility

The BK-7m’s composite video output can be connected to an external monitor, which allows the audience or other musicians onstage to follow the lyrics and chord symbols of the performed song. Turn your show into a multimedia experience!

Display type

128 x 64 dots, graphic LCD

Sound generator (Conforms to GM2/GS/XGlite)

Max. polyphony
128 voices
1,092 tones, 57 Drum Sets
Multitimbral parts
real-time parts (UP1, UP2, LWR, MBS) + 16 Song parts
Master tuning
415.3 Hz to 466.2 Hz
Key control (Transpose)
–6 to +5 in semitones (for audio/MIDI data & AUDIO INPUT signals)
Tempo change
Quarter Note = 20 to 250 for SMF and Music Styles, 75 to 125 % for mp3 and WAV files
Part mute functions


Real-time parts (UP1, UP2, LWR, MBS)
reverb: 12 types, chorus: 6 types, MFX: 84 types, parametric EQ: 6 presets + 1 User, multi-band compressor: 6 presets + 1 user
Music Style/SMF section
reverb: 8 types, chorus: 8 types, MFX A, B, C: 84 types each, parametric EQ: 6 presets + 1 user, multi-band compressor: 6 presets + 1 user

Music Style section

Music Styles
433 in 10 “Rhythm” families
One Touch memories
4 per Music Style
Style Cover
30 presets
Style Makeup Tools
Instrument-oriented editing


Real-time player
SMF (Format 0/1), KAR, mp3, WAV
Song Chord Extractor
Automatic chord detection for SMF files
SMF Makeup Tools
Instrument-oriented editing
SMF Cover
30 presets

Performance memories

Performance lists
Unlimited number (storage on USB memory), 954 Music Assistant (Internal on BK-7m)
Performance memories per list
Max. 999
Quick location of Performance memories




USB recorder
Records audio files (WAV, 44.1 kHz/16-bit linear format)


SMF and mp3/WAV

Panel controls

Rotary encoder
Data dial with push switching function


Headphone jack
stereo 1/4" phone type
Audio inputs
INPUT L/MONO, R jack: 1/4" phone type
USB connectors
USB Host (data storage), COMPUTER (reception and transmission of MIDI data)
MIDI IN/OUT connectors
Video output jack
composite (PAL or NTSC, selectable)
Audio outputs
OUTPUT L/MONO, R jacks: 1/4" phone type
Pedal and footswitch jacks
SWITCH/EXPRESSION jack (programmable), FC-7 jack (programmable)


Power supply
9 V DC, supplied AC adaptor
Current draw
900 mA

Included accessories

Owner’s Manual, AC adaptor, 4 screws (M5 x 12)


USB Flash Memory: Roland M-UF-series, Amplifiers: Roland KC-series, Stand: Roland PDS-10, SS-PC1, Pedals: Roland FC-7 Foot Controller, Roland DP-series/BOSS FS-5U footswitch, Roland EV-series expression pedal

Size and Weight

Width (W)
303 mm11-15/16 inches
Depth (D)
194 mm7-11/16 inches
Height (H)
101 mm4 inches
1.7 kg3 lbs. 12 oz.

(excluding AC adaptor)

All specifications and appearances are subject to change.


To the top of page