VT UltraMic-384 Hardware Operation Manual
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Virtins Technology
When the VT UltraMic-384 is recording, it is important not to power off the device. Otherwise, all
the files stored in the SD card may be compromised.
SOLUTION
: while recording (beware of the blinking RED led) you can stop the device by pressing
the button for few seconds. Then the green led will blink and the recorded file will be closed
correctly.
Minutes Recording Mode
In this recording mode you can do recordings with a specified length and sampling rate, with no need to do a complex
scheduling. You can also specify, in minutes from 1 to 10, the size of the file into which the recording will be divided.
For example if you need to record for 70 minutes at 48 kHz with one minute split size in a simple way please consider the
following steps:
-
By using a simple text editor with your PC create three files with the following extension:
70.rec
,
48.spr
and
1.spl
-
copy the files in a micro SD card
-
power the VT UltraMic-384, it will start recording at 48 kHz for 70 minutes, splitting the recording.
If you need different times, please change the “70” in the file name with the correct one. If you need other sampling
frequencies, please change the “48” in the file name with the preferred frequency.
Allowed frequencies in kHz are:
384
192
96
48
200
250
Allowed file name for minutes are between
11.rec
and
90.rec
(the range is between 11 and 90 minutes). For the split file size, the
name can be
1.spl
and
10.spl (
range from 1 to 10 minutes).
NOTE:
-
If no sampling rate is specified it will record at 384 Khz.
-
No scheduling must be present in the memory of VT UltraMic-384.
Otherwise, the scheduling mode will be
followed instead of Minutes Recoding mode. See
Scheduling Deletion
.
Scheduled Recording Mode
The scheduled recording mode allows a wide flexibility in record planning. For example, you can record a bird’s song every day
from 5:00 a.m. for 2 hours at 48kHz and then
bat’s calls
from 10:00 p.m. for 50 minutes at 384kHz and so on. Another recording
scheme mainly used in
soundscape recording
can be as follow: you can record a sound for 10 minutes then keep the device off
for 50 minutes and then repeat the cycle.
There are two ways to program the device for scheduling:
By the
UM384BLE CONFIG
Android app
Manually editing the XML file
