BOMGE BMG-22M Mini 2 Channel USB Audio Interface User Guide
- June 15, 2024
- BOMGE
Table of Contents
BOMGE BMG-22M Mini 2 Channel USB Audio Interface
Important Information
If you are using a “studio” condenser microphone designed to operate on 48 volt phantom power, press the 48v button. Some lower spec. condenser microphones are able to operate from a lower phantom power voltage – typically 15 V. You should check the mic spec to see if it is safe to operate it from 48 V; if not, obtain a suitable external phantom power supply. Most modern microphones of other types, e.g., dynamic or ribbon, will not be damaged by the inadvertent application of phantom power, but note some older mies may be; if you have any doubt, please check the specification of your mic to ensure it is safe to use.
Using Direct Monitoring
You will frequently hear the term “latency” used in connection with digital audio systems. In the case of the simple DAW recording application described above, latency will be the time it takes for your input signals to pass through your computer and audio software. Latency can be a problem for a performer who wishes to record while monitoring their input signals.
The BMG-22M is fitted with a Direct Monitoring option, which overcomes this
problem. Setting the front panel DIRECT MONITOR switch to ON will route your
input signals directly to the BMG-22M headphone and main monitor outputs. This
enables you to hear yourself with zero latency.
e., in “real time” – along with the computer playback. Your inputs will be
summed to mono, so both mic and instrument will appear in the centre of the
stereo image. Note that the input signals to your computer are not affected in
any way by the use of Direct Monitor.
Headphone monitoring
Connect a pair of stereo headphones to the front panel headphone output to
hear both what you are recording – your current input signal(s), plus any
tracks you’ve already recorded in your computer.
Note: Set the front panel DIRECT MONITOR switch to when recording. The
pre-recorded tracks will be heard in stereo, and the current input signals in
mono – central in the stereo image. If you are using both the mic and
instrument inputs, the two inputs will be summed in mono.
HARDWARE FEATURES
Front Panel
The front panel includes the input connectors formic and line/instrument signals, and the input gain and monitoring controls.
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Input 1 – electronically balanced input via 3-pin XLR socket for microphones.
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GAIN 1 adjust the gain for the microphone signal at Input 1. The gain controls have tri-colour LED ‘rings’ to confirm signal level: green indicates an input level of at least -24 dBFS (i.e., ‘signal present’), the ring turns amber at -6 dBFS to indicate the signal is close to clipping, and red at O dBFS (digital clipping).
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48V – phantom power switch formic input – enables 48 V phantom power at the XLR socket.
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Input 2 – ¼” TRS jack socket to connect both instruments (unbalanced TS jack) or mono line level {balanced) sources.
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GAIN 2 – adjusts the gain for the line/instrument signal at Input 2. The gain control has a tri colour LED ring as [2].
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PHONE – main monitor output level control – sets the front panel headphone output.
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MONITOR – main monitor output level control – sets the output level at the rear panel
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USB LED – a green LED illuminates when the Scarlett is connected and recognised by your computer.
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DIRECT MONITOR – selects monitoring of input signals (mixed with the DAW output) to be directly from inputs (ON) or via the DAW (OFF).
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– ¼” TRS output jack. If your headphones have a ¼” TRS jack plug, connect them directly; if they have a 3.5 mm TRS “mini jack”, use a TRS ¼”-to-3.5 mm jack adaptor. Note that it is likely headphones fitted with 4-pole TRRS plugs will not operate correctly.
Back Panel
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K (Kensington security lock) – secure your to a suitable structure if desired.
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USB 2.0 port – Type C connector; connect the UBM11 to your computer with the cable supplied.
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LINE OUTPUTS: LEFT and RIGHT -OUTPUT.
Examples of use
BMG-22M is an ideal audio interface for many DAW applications running on a
laptop or other computer, PC or Mac. A typical set of connections is
illustrated below.
Connecting BMG-22M to Loudspeakers
You can use the outputs on the rear panel to connect monitor speakers. Active monitors have internal amplifiers with a volume control, and can be connected directly. Passive loudspeakers require a separate amplifer; the rear panel outputs should be connected to the amplifier inputs.
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Connecting active speakers
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Connecting passive speakers
consumer (Hi-Fi) amplifiers and small powered monitors will have unbalanced
inputs, either on phono (RCA) sockets, or via a 3.5 mm 3-pole jack plug
intended for direct connection to a computer. In either case, use a suitable
connecting cable with jack plugs at one end.
The line outputs sockets, and are electronically balanced. Typical.
Professional power amplifiers will general have balanced inputs; we highly
recommend usi balanced ces to connect these to the outputs of the BMG-22M.
NOTE You run the risk of creating an audio feedback loop if loudspeakers
are active at the same time as a microphone! We recommend you always turn off
(or turn down) monitoring loudspeakers while recording, and use headphones
when overdubbing.
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