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Roland MICRO BR® Specifications

Note: This article refers to the BOSS MICRO BR® Digital Recorder that was released in 2006. If you’re looking for information on the 2011 MICRO BR® BR-80 Digital Recorder, please click this link:
MICRO BR® BR-80.

MICRO BR: Digital Recorder

Tracks
Track: 4
V-Track: 32 (8 V-Tracks per each Track)
* Up to 2 tracks can be recorded simultaneously, and up to 4 tracks can be played back simultaneously.
Useful Capacity
SD memory card: 32mb – 1G bytes
Data Type
HiFi (MT2)
STANDARD (LV1)
LONG (LV2)
Audio Data Type (MP3 Mode)
MP3 (192 kbps, 44.1 kHz)
MP3 (128 kbps, 44.1 kHz)
MP3 (64 kbps, 44.1 kHz)
WAV (44.1 kHz, 16 bit)
* The MICRO BR can play the MP3 in bit rate range of 64 kbps–320 kbps.
Signal Processing
AD Conversion:
24 bit+AF method (GUITAR IN, onboard mic)
24 bit (LINE IN/MIC)
DA Conversion: 24 bit
* AF method (Adaptive Focus method)
Adaptive Focus is a unique Roland/BOSS technology that allows the signal noise (S/N) ratios of AD and DA converters to be vastly improved.
Sample Rate
44.1 kHz
Frequency Response
20 Hz to 20 kHz
Recording Time (conversion in one track)
* The listed recording times are approximate. Times may be slightly shorter depending on the number of songs that were created.
* The number is the total for all the tracks that are used. If each of the four tracks contain an equal amount of data, the length of the resulting song will be approximately 1/4 of the above.
* The memory capacity (recording time) decreases when the MP3 file etc. exist in the memory.
Memory Card Capacity by Data Type
HiFi (MT2):
32 MB = 15 min.
64 MB = 31 min.
128 MB = 64 min.
256 MB = 128 min.
512 MB = 257 min.
1 GB = 502 min.

STD LV1:
32 MB = 18 min.
64 MB = 38 min.
128 MB = 76 min.
256 MB = 154 min.
512 MB = 309 min.
1 GB = 604 min.

LONG (LV2):
32 MB = 23 min.
64 MB = 47 min.
128 MB = 96 min.
256 MB = 192 min.
512 MB = 386 min.
1 GB = 755 min.
* The above-listed recording times are approximate. Times may be slightly shorter depending on the number of songs that were created.
* The above number is the total for all the tracks that are used. If each of the four tracks contain an equal amount of data, the length of the resulting song will be approximately 1/4 of the above.
* The memory capacity (recording time) decreases when the MP3 file etc. exist in the memory.
Recording Time (conversion in MP3 mode, Stereo) Memory Card Capacity (MP3)
64 kbps
32 MB = 65 min
64 MB = 131 min
128 MB = 265 min
256 MB = 531 min
512 MB = 1065 min
1 GB = 2081 min

128 kbps
32 MB = 32 min.
64 MB = 65 min.
128 MB = 132 min.
256 MB = 265 min.
512 MB = 532 min.
1 GB = 1040 min.

192 kbps:
32 MB = 21 min.
64 MB = 43 min.
128 MB = 88 min.
256 MB = 177 min.
512 MB = 355 min.
1 GB = 693 min.
Recording Time (conversion in MP3 mode, Stereo) Memory Card Capacity (WAV)
32 MB = 2 min
64 MB = 5 min
128 MB = 12 min
256 MB = 24 min
512 MB = 48 min
1 GB = 94
* The above-listed recording times are approximate. Times may be slightly shorter depending on the number of MP3/WAV files that were created.
* The memory capacity (recording time) decreases when
the track data (Song) exist in the memory.
Nominal Input Level
GUITAR IN jack: -20 dBu
LINE IN/MIC jack: -10 dBu (LINE)
LINE IN/MIC jack: -40 dBu (EXT MIC)
Input Impedance
GUITAR IN jack: 1 MΩ
LINE IN/MIC jack
LINE: 16 kΩ
EXT MIC, Plug-in Power=OFF: 18 kΩ
EXT MIC, Plug-in Power=ON: 2.2 kΩ
Nominal Output Level
PHONES/LINE OUT jack: -10 dBu
Nominal Output Impedance
PHONES/LINE OUT jack: 33 Ω
Recommended Load Impedance
PHONES/LINE OUT jack:
16–100Ω(PHONES)
1 kΩ or greater (LINE OUT)
Interface
USB Connector (mini B type)
Display
16 Characters x 2 Lines, 22 icons
(White Backlit LCD)
Connectors
GUITAR IN jack (1/4 inch phone type)
LINE IN/MIC jack (Stereo miniature phone type)
PHONES/LINE OUT jack (Stereo 1/4 inch phone type, supports Plug-in Power)
USB connector (mini B type)
Power Supply
Size AA Dry battery x 2 (alkaline batteries recommended)
DC 9 V: Supply AC Adaptor (PSA series: sold separately)
Current Draw
9 V/140 mA (when you use the PSA series)
3 V/320 mA (when you use the batteries)
* May vary according to usage conditions, batteries used,
and type of SD memory card used.
• Expected battery life under continuous use:
Alkaline dry cell batteries: Approximately 6 hours
(with power save function)
Dimensions
136.0 (W) x 81.5 (D) x 21.5 (H) mm
5-3/8 (W) x 3-1/4 (D) x 7/8 (H) inches
Weight
130 g
5 oz (excluding SD memory card and batteries)
Accessories
Soft Case
Size AA alkaline dry cell batteries (2)
Demo card (128 MB SD Memory Card: Already inserted when the MICRO BR is shipped)
Owner’s Manual
Leaflets (About Memory Cards, Information/Effect
Patch List)
Options
AC Adaptor: PSA series
• In the interest of product improvement, the
specifications and/or appearance of this unit
are subject to change without prior notice.
* 0 dBu = 0.775 Vrms

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