Jam Station

Kick Out the Jams.

Kick Out the Jams.

With the BOSS JS-5 JamStation, guitar and bass players can instantly jam along to high-quality accompaniments, create new accompaniments, and even record up to 34 minutes* of their playing without any knowledge of MIDI sequencing or recording. This innovative tabletop backing machine features hundreds of songs with 4-part arrangements that can be easily structured to fit user-defined chord progressions—giving musicians a simple, yet effective way to practice, jam, build complete musical arrangements and write songs.

*Optional 32MB SmartMedia card required to expand JS-5's recording time to 34 minutes.
  • - Highly intuitive backing accompaniment machine and song composer for guitarists
  • - Professional-quality sound engine with separate reverb, chorus, and multi-effects
  • - 200 Preset songs with 4-part backing tracks
  • - 100 User songs and 26 user-definable chord progressions
  • - Separate audio track and mic/line/guitar input for recording live input sources
  • - Recording time expandable up to 34 minutes with SmartMedia card
  • - Built-in Timestretch feature automatically syncs audio recordings to internal patterns
  • - Locator function loops selected passages for practicing or jamming
  • - Assignable footswitch can be used for start/stop or loop control

The Hottest Rhythm Section Around

The JS-5 is your ticket to playing with the hottest rhythm section in town. Through its unique Backing Generator, this compact tabletop machine creates full four-part accompaniments—perfect for guitar players who perform alone, or anyone just wanting to jam. And there's no need to be an expert in MIDI sequencing; the JS-5 has 200 Preset songs ready to go—just tell it what chords to follow and the tempo you'd like, then start playing along. Individual parts can be muted for using the JS-5 as a preset drum machine with bass sounds, and up to 26 User chord progressions and 100 User songs may be stored in internal memory. Better still is its separate audio track, which can be used for recording an input source to be played back with one of the JS-5's internal songs.

Simplified Audio Recording

Recording to the JS-5's dedicated audio track is no different than recording to tape—just hit the Record button and start playing. This built-in audio track is great for recording up to 34 minutes* of vocals, guitar, or even CD's, and until now, this feature was completely unheard of in a preset backing machine. A selectable input source ensures the JS-5 is properly matched to the type of instrument connected to its input—be it a microphone, line-level source or guitar. Even more amazing is the JS-5's ability to automatically sync audio recordings to any of its onboard songs through the use of a Timestretch function. This time-saving feature makes it possible to create full accompaniments, complete with digital audio, in a matter of minutes.

Helpful EZ Compose Feature

Creating arrangements in the JS-5 is simple, thanks to a new EZ Compose feature. By pressing the EZ button, users can select styles and chords through an interactive system that eliminates hidden menus—just cursor to the item to be modified and use the Value dial. With EZ Compose, guitarists can create and jam along to great-sounding backing accompaniments quicker than most bands can do a live sound check.

*Optional 32MB SmartMedia card required to expand JS-5's recording time to 34 minutes.

Maximum Polyphony
32 voices
Instruments (including Bass): 128
Drum Kits: 16
Reverb, Chorus, Insert Effects (40 types)
Preset Style: 200 x 8 (Forms)
User Style: maximum 20 x 8 (Forms) *1
(Form: Intro, Verse 1, Fill 1, Verse 2, Fill 2, Break 1, Break 2, ending)
Preset Songs: 200
User Songs: maximum 100 *1 *2
Card Songs: maximum 100 *1 *2
Song Length: Maximum 999 measures for song *1
(This figure may vary depending on the size of the Styles, and the number of chords and Forms used.)
Per quater note: 96
Quater note: 20 to 260
Data Input Method
Realtime / Step
Available Recording Time on Audio Track
Internal Memory:
1 minute, 58 seconds (Long recording mode)
1 minute, 35 seconds (Hi-Fi recording mode)

Memory Card (SmartMedia):

32 Mbytes
34 minutes, 2 seconds (Long recording mode)
27 minutes, 14 seconds (Hi-Fi recording mode)

64 Mbytes
68 minutes, 9 seconds (Long recording mode)
54 minutes, 31 seconds (Hi-Fi recording mode)

* The above times are the total recording times for all songs. If you record for an extended time on one song, the recording time available for the other songs will decrease, and in some cases recording may not be possible.
* The available recording time is the maximum recording time available in the internal memory and memory card. This figure may be smaller depending on the memory used for recording User (or Card) Songs and any data backed up to the memory card.
Recording Input Jack
Output Jacks (L (MONO), R )
Headphone Jack (stereo miniture phone type)
Foot Switch Jack
MIDI Connectors (IN, OUT)
AC Adaptor Jack (AC 14 V)
Power Supply
AC 14 V (AC Adaptor)
Current Draw
650 mA
AC Adaptor (BRC Series)
Foot Switch: FS-5U
Foot Switch Cable: PCS-31 (Roland)
(1/4 inches Phone Plug (stereo) - 1/4 inches Phone Plug (mono) x 2)

Size and Weight

Width (W)
269 mm10-5/8 inches
Depth (D)
176 mm6-15/16 inches
Height (H)
63 mm2-1/2 inches
1.1 kg2 lbs. 7 oz.

*1 This may be less due to the amount of recorded user (card) songs/styles, the recording time on the audio track, and the number of backups on memory card.
*2 When a memory card is used, audio recording is possible for a maximum of 100 songs. When the JS-5 is used by itself. audio recording is possible for a maximum of 6 songs.

All specifications and appearances are subject to change.


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