24
2.1.5 Audio
Basic Specifications
WAV playback, voice recording and playback are supported.
By using the Microsoft
SoftwareMixer
function, output sounds from multiple applications can
be mixed and output (in 44.1 KHz, 16-bit stereo mixing).
Voice Recorder is integrated in the terminal as the sound system application to make it possible to
perform WAV file streaming playback and local file playback in HTTP.
Audio and Buzzer use the same integrated speaker, therefore it is not possible to playback Audio
and Buzzer sound at the same time. In this case, Buzzer sound has the priority.
Playback
Table 2.11
KHz 8 11.025
12 16 22.05
24 32 44.1
48
Mono Yes
Yes Yes
Yes
Yes Yes
Yes
Yes
Yes
Stereo Yes
Yes Yes
Yes
Yes Yes
Yes
Yes
Yes
Sampling
frequencies
Sampling frequencies other than those above are not supported.
Stereo/Monaural
8-bit or 16-bit
In reality, the integrated monaural speaker does not output sound in stereo.
Recording
Table 2.12
KHz 8
11.025
12
16
22.05
24
32
44.1
48
Monaural Yes
Yes Yes
Yes
Yes Yes Yes Yes
Yes
Sampling
frequencies
Sampling frequencies other than those above are not supported.
Stereo/Monaural
8-bit or 16-bit
Monaural sound input only via the microphone.
Setting Sound Volume
The “Volume & Sound” at the Control Panel can be used to set up sound volume in six grades
from loud to low and ON/OFF of mute. A sound volume also can be set up using
Win32 API
function
in application.
Audio ON/OFF
The audio system can be disabled to save the power. “Enable” or “Disable” for the audio system
in the terminal is controlled using the System Library in application.
The functions of the System Library relevant to the Audio ON/OFF are as follows.
SysAudioOff
:
Turns off the audio virtually with the audio turned off.
SysAudioOn
:
Turns on the audio virtually with the audio turned on.
SysGetAudioPowerState
:
Retrieves “Enable” or “Disable” status for turning off the audio
virtually.
Summary of Contents for IT-800 Series
Page 173: ...173 Copyrights Tab This tab is for displaying the OS copyright information Figure 3 19 ...
Page 201: ...201 Date Tab This tab is for setting display format of date Figure 3 56 ...
Page 247: ...247 4 2 Games The terminal comes with two games Solitaire and Bubble Breaker Figure 4 2 ...
Page 255: ...255 4 5 Calculator The application can be used to operate nine digit calculator Figure 4 11 ...