Roland Octa-Capture User Manual

71
Audio Buer Size
You can adjust the audio input/output buer size. (The default setting is the ve step from the left.)
Decreasing the buer size will decrease the latency and improve the realtime response. However,
depending on the processing power of your computer and the complexity of your song data, this
may make clicks and pops during recording or playback more likely.
Increasing the buer size will increase the latency, but will make audio data transfer more stable,
decreasing the likelihood of clicks and pops.
If you’re playing a software synthesizer in real time or using your DAW software to monitor the
“thru” signal of the audio input, you should decrease the buer size in order to improve the realtime
response.
Conversely, if you’re recording or playing back song data that contains numerous tracks and imposes
a heavy processing load on your computer, you should increase the buer size in order to decrease
clicks and pops.
Change the buer size as appropriate for your situation in order to achieve a balance between
realtime response and audio data transfer, while avoiding problems such as clicks and pops.
* If you’ve changed the buer size, you must restart the software that’s using the OCTA-CAPTURE.
Alternatively, if you’re using software that has an audio device test function, execute the
software’s test function.
* Depending on the software you’re using, its audio settings may also have a buer size adjust-
ment.
Increase this buer size if you still experience clicks and pops during playback or recording even
after adjusting the audio buer size in your software.
* Some software does not allow you to adjust the buer size.
Recording Margin
If there are dropouts or noise in the recorded audio data even after you have adjusted the audio
buer size in your software and have also adjusted the “Audio Buer Size,” try increasing this
recording margin setting.
* Some software does not allow you to adjust the buer size.
Recording Timing
Adjust this setting if the timing of the recorded audio data is incorrectly aligned.
* If audio software is running, these settings will not be applied immediately even if you click
[OK]. Close all audio software; the settings will be applied the next time you start up the
software.

Roland Octa-Capture Specifications

Audio Channels

number of audio record channels (44.1/48/96 kHz)	12 channels
number of audio playback channels (44.1/48/96 kHz)	10 channels
number of audio record channels (192 kHz)	4 channels
number of audio playback channels (192 kHz)	4 channels

Signal Processing

pc interface bit depth	24-bit
ad/da conversion bit depth	24-bit
internal processing bit depth	40-bit

Sampling Frequency

ad/da conversion sampling frequency	44.1/48/96/192 kHz
digital (in/out) sampling frequency	44.1/48/96 kHz

Input and Output Levels

nominal input level (input jack 1-6, xlr type)	-56 to -6 dBu
nominal input level (input jack 7-8, xlr type)	-50 to +0 dBu
nominal input level (input jack 1-8, 1/4-inch trs phone type)	-46 to +4 dBu
nominal output level (output 1-8)	+0 dBu (balanced)
headroom	16 dB

Impedance

input impedance (input jack 1-6, xlr type)	5 k ohms (balanced)
input impedance (input jack 7-8, xlr type)	10 k ohms (balanced)
input impedance (input jack 1-8, 1/4-inch trs phone type)	17 k ohms (balanced)
output impedance (output 1-8)	1.8 k ohms (balanced)
output impedance (phones)	47 ohms

Frequency and Noise

frequency response (192 kHz)	20 Hz to 90 kHz (+0/-8 dB)
frequency response (96 kHz)	20 Hz to 40 kHz (+0/-2 dB)
frequency response (48 kHz)	20 Hz to 22 kHz (+0/-2 dB)
frequency response (44.1 kHz)	20 Hz to 20 kHz (+0/-2 dB)
residual noise level	-87 dBu typ. (GAIN: min., 600 ohms terminated, IHF-A)

Dynamic Range and Display

dynamic range (ad block input 1-8)	104 dB typ. (GAIN: min.)
dynamic range (da block output 1-8)	113 dB typ.
display	128 x 64 dots Graphic LCD (backlit LCD)

Connectors

input jacks (xlr type / 1/4-inch trs phone type)	XLR type (balanced/phantom power +48 V), 1/4-inch TRS phone type (balanced)
coaxial input connector	present
coaxial output connector	present
headphone jack	Stereo 1/4-inch phone type
output jack (1/4-inch trs phone type)	balanced
midi connectors	In, Out
usb connector	present

Power and Dimensions

power supply	DC 9 V (AC adaptor)
current draw	1.45 A
dimensions	283.8 (W) x 157.9 (D) x 50.4 (H) mm / 11-3/16 (W) x 6-1/4 (D) x 2 (H) inches
weight	1.32 kg / 2 lbs 15 oz