Short Operating Instructions for EDIC-mini Ray+ A105 recorders
Purpose:
The Edic-mini Ray+ series of professional voice recorders with an adaptive directional pattern and advanced features
including playback mode in the Recorder itself and OLED indicator. The use of 8 digital microphones with built-in 24-bit
audio codec provides maximum recording quality in the most difficult conditions, high acoustic sensitivity (up to 20
meters) and a wide dynamic range (24 bit). Availability of markers allows it to confirm the authenticity of the recording in
court. Recording is performed onto microSD card up to 256GB, which provides up to 1 year of continuous recording.
When recording in noisy, echoing premises at long distance it is impossible to achieve the desired recording quality using
conventional recorders with 1 or 2 microphones. The problem is that when recording at considerable distance the
recorder records not only the necessary signal, but also some external noise and the reflection of sound. This
interference increases quadratically depending on the distance from the sound source and at the distance of several
meters it really can drown out the desired signal. The only solution is to form a signal source direction pattern with
maximum drowning of signal from other directions.
To generate a direction pattern there are 8 microphones used in the
Edic-mini Ray+ recorders
forming so-called phased
array (similar to the one used in radars).
The application of 8 microphones also reduces the inherent noise of the microphones by 2.5 times. In the end, record
gain from the use of 8 microphones can be from 2 up to 6 (depending on the recording conditions) as compared to
recorder with one microphone.
Main Technical Characteristics of the Recorders
Model Power Supply
Dimensions
(mm)
Weight (g)
Autonomy
(h)*
Signal-to-noise
ratio (dB)
Sensitivity
(dB)
Sampling
rates (kHz)
Frequency
band (kHz)
Charging
period
A105
rechargeable
battery
8х33х100
30
90
79
-80
8;16;32
0,1-15
once a year
*The parameter of autonomy is specified for Record Mode 8KHz/8 bit, in case of higher sampling rate or bitrate,
autonomy value is lower. Autonomy value considerably depends on the model of microSD in use and can vary to be
higher or lower. Average current consumption: in record mode (8kHz / 8bit) 2.7mA, in standby mode 2.5mkA without card
installed.
Operating and storage temperature range ............... 0- + 50C
Operating lifetime ………………………………… .3 years
Features:
1. OLED screen
2. 8 record channels (available for 1, 2, 4, 6 and 8
microphones)
3. Stereo recording with MEMS microphones with 24-bit audio
codec, dynamic range of the codec 144 dB, signal/noise ratio
79 dB.
4. Acoustic sensitivity up to 20m, recording frequency range 0.1-15kHz, sampling rates of 8, 16, 32kHz
5. Voice activation system (VAS);
6. Timers to enable recording at the preset time (4 pcs.); (single and daily)
7. Linear and circular recording;
8. Digital authenticity markers preventing unauthorized modification of files; Calendar, attachment of records to the time
and date;
9. Password encryption of records made;
10. Control and indication: buttons and LEDs;
11. Records playback from the Recorder (through headphones).
Operating the Recorder
1. Battery Charging
Before starting make sure the rechargeable battery is charged. Charge the battery if necessary.
Connect the supplied cable to the micro USB port of the Recorder, then connect it to the USB port of the PC, or to any
other USB charger with an output voltage of 5V and a current of at least 500 mA. During charging, the red LED will be on,
upon completion the green LED is on. Full charging takes 3-4 hours.
IMPORTANT: After the Recorder has been charged, remove the cable from the Recorder to avoid any possible
mechanical damage.
