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MMA-A
Digital Audio Interface
User’s Manual
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The MMA-A Digital Audio Interface is a highquality dual-channel microphone preamplifier
and A/D converter. It allows you to capture
crystal-clear audio via your favorite recording
/ broadcasting apps. The MMA-A can be used
with most DPA microphones.
Getting started
Connect your DPA microphone(s) to the MicroDot input(s) on the MMA-A, denoted I and II.
(If only one mic is connected to either input, the signal will be interpreted as MONO and
automatically sent to both output left and right.)
Connect your DPA microphone(s) to
the MMA-A
Connect the MMA-A to your
iOS device.
Cable length: 100 cm (39.4 in)
Two cables are supplied with the MMA-A:
One Micro USB-B to iOS (Lightning) and one
Micro USB-B to PC / Mac (USB-A).
Cable length: 30 cm (11.8 in)
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Download the App
Download and install the MMA-A App from the Apple App Store.
The MMA-A can be used right out of the box but to take full advantage of it, please refer to these
instructions to get started using the MMA-A App.
Please note that the MMA-A will
work with most 3rd-party apps and
therefore can be used in various
situations including live broadcasts, as
well as audio and video recordings.
GAIN
Use the GAIN slider to adjust input levels. Slide
to the right to increase amplification, to the left
to decrease. Make sure to keep an eye on the
level meters when you are adjusting gain. The
meters should stay in the green and yellow areas.
FILTER
The FILTER button (low cut) cuts out unwanted,
low-end frequencies (rumble) that can decrease
the intelligibility of your recorded audio. In most
cases we suggest using the FILTER button and if,
for example, you are recording outside near a
road with trac, this setting is essential.
MONITOR
Use the MON button to send audio to your
headphones so you can hear what you are
recording. Please note that a headphone must
be connected to the iOS device, otherwise the
button will not activate and you’ll be prompted
to connect a headset. If the headset includes
a microphone it must be connected prior
to connecting the MMA-A via the Lightning
connector. This is due to the iOS ‘last entry
active’ nature of operation. (We recommend
using a wireless headset when using an
iPhone 7 and beyond. Please note that this
adds additional latency due to the bluetooth
connection.)
LOCK
Use the LOCK button to block 3rd party apps
from controlling gain. Gain settings can be
controlled and saved on the MMA-A for use
in your favorite recording / broadcasting apps.
The lock button also controls the setting of the
low cut / high pass filter. Saved locked settings
are automatically activated the next time you
connect to the MMA-A. The lock also stays
active when connecting the MMA-A to a PC
or Mac.
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MONO
If only one microphone is connected to either
input I or II, MONO is chosen automatically.
The mic input will be routed to both left and
right output. Only one GAIN slider and FILTER
button will be available in this mode.
STEREO
Use STEREO when you need to capture
sound sources in stereo. Both microphones
are controlled with one GAIN slider. Example:
Ambiance sounds can be recorded in stereo
using two mics that have the same sensitivity.
Important: When using STEREO, you must
use two mics that are optimized for stereo
recording, for instance the specially-selected
d:screet™ 4060 pair included in the SMK4060 Kit.
Other available kits include: ST4006*,
ST4011*, ST2006*, ST2011*
* Must be used with DPA MMP-G amplifiers for connection
to MicroDot.
DUAL
Use DUAL when the gain must be set
individually for input I and II (for example, with
two dierent microphone types or in situations
where two people with dierent voice levels are
to be recorded). The FILTER buttons are also
individual in this situation.
SUM
Use SUM to make a mix of the two input
channels. When two microphones are
connected, the MONO button changes to
SUM. This means that the two inputs will be
sent to both output channels.
Indiviual gain can be set for each input.
PRESETS
Presets store your preferred settings for specific
microphone(s) and make your set up easier.
After choosing your settings, create the preset
by pushing the numbered preset button of your
choice for three seconds. The next time you
plug in the same mics, push your preset button
and you are ready to go – no adjustments
necessary.
For use with PC / Mac
Connect the MMA-A to the USB input on your
PC / Mac. It will now work as a normal external
soundcard and you can use your regular programs
to record or broadcast the audio from the
connected microphones.
Cleaning
The black surface of the MMA-A is fairly scratch resistant, but is sensitive to detergents. Avoid using
solvents (such as: gasoline, acetone, alcohol, turpentine, etc) for cleaning purposes. A damp cloth
with warm water is recommended.
Microphone placement and usage
Please refer to the manual(s) for the specific microphone included within the package.
Compatible with
Mac / PC / iOS
Requirements
iOS version: 10 or later
Connection / Power: Lightning & USB 2.0
Made for
iPhone 7 Plus, iPhone 7, iPhone 6s, iPhone 6, iPhone 5,
iPad Pro (12.9-inch), iPad Air, iPad Air 2, iPad mini 4,
iPod touch (6th gen).
MMA-A
Digital Audio Interface
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Specifications
Resolution
24 bit
Noise floor
-114 dBFS, A-weighted
Frequency range
20-22 kHz ±0.2 dB (Fs = 48 kHz)
20-40 kHz ±0.2 dB (Fs = 96 kHz)
Total harmonic distortion (THD)
THD < -100 dB, 0.001% @ 1 kHz @ -10 dBFs
Dynamic range
Typ. 114 dB
Full Scale Output
1 Vrms @ 0 dB Gain
Supported sample rates
44.1, 48 (default), 88.2, 96 kHz
Filter (low cut / high pass)
2. Order @ 80 Hz, individual per channel
Weight
50 g (1.8 oz)
Diameter
56 mm (2.2 in)
Temperature range
0°C to 45°C (32°F to 113°F)
Current consumption
<100 mA
(The MMA-A gains power via the apparatus it is connected to.
This equates to approx. 6-7 hours of audio capture tested on a
new iPhone 6 or 7.)
Sample rates can be set by 3rd-party app
Service & repair
If you are not satisfied with the characteristics exhibited by this product, please go to dpamicrophones.com/service for
instructions.
Warranty
The MMA-A Digital Audio Interface is covered by a two-year limited warranty.
CE marking
This product conforms to all relevant directives approved by the European Commission.
© September, 2018. DPA Microphones A/S
Product features and specifications are subject to change without further notice.
DPI-M-DVICE-02
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