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DESCRIPTION JP2008109529

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DESCRIPTION JP2008109529
The present invention prevents a silence state when an external device that performs audio
output via an interface is connected. When connection to a computer is detected via an interface,
a connection detection signal is detected on the speaker side. When the "volume increase request
start time" as a preparation period elapses from the connection detection, a command for
requesting the volume increase is output from the speaker to the computer. This causes the
computer to increase the volume of the system level to the maximum volume. When a sufficient
"volume increase request time" has elapsed from the start of the volume increase request, the
volume increase request is released. As a result, when the speaker is connected to the computer,
it is possible to avoid the situation where the system level volume of the computer is silent and
the sound is not output from the speaker. [Selected figure] Figure 3
Speaker apparatus, computer system, volume control method thereof and program
[0001]
The present invention relates to a speaker device, and more particularly to a speaker device
connected to a computer device via an interface, a computer system including the speaker device,
a processing method in these, and a program for causing a computer to execute the method.
[0002]
The interface for connecting personal computers and peripheral devices has been standardized,
and in recent years, serial bus interfaces such as Universal Serial Bus (USB) and Institute of
Electrical and Electronic Engineers (IEEE) 1394 have been mainly used.
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As peripheral devices connected to such an interface, an external recording device such as a hard
disk or a DVD (Digital Versatile Disk) is known.
[0003]
On the other hand, as the standardization of the interface progresses, attempts are being made to
connect non-conventional peripheral devices to the interface. One of them is audio equipment.
For audio output from a personal computer, conventionally it was common to use an analog
audio terminal, but recently a USB speaker has been used to play digital data by connecting to a
USB interface. (See, for example, Patent Document 1). Unexamined-Japanese-Patent No. 2002132494 (FIG. 1)
[0004]
When audio output is performed using a standard interface as described above, generally, there
are three levels of volume control that may be performed in the entire computer system. The first
step is application level volume control. This is specified to the user as a volume in the playback
software. The second step is system-level volume control of the personal computer. This is
provided as a volume in the operating system and is used by the user as needed. The third step is
volume adjustment in an external device (for example, a USB speaker) connected to the interface.
This is specified to the user as the volume of the external device itself. That is, although the
volume adjustment in the first and third stages is in a state where it is easy for the user to grasp,
the volume adjustment in the second stage is considered to be in a state where it is difficult for
the user to grasp.
[0005]
On the other hand, immediately after the external device is connected via the interface, the
volume at the system level of the personal computer depends on the audio driver of the system,
and behaves differently depending on the model. If the system level (second stage) volume is
silent, no sound will be output even if the application level (first stage) volume or the external
device (third stage) volume is adjusted become. In such a case, the user is suspected of hardware
failure and often does not attempt to adjust the system level.
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[0006]
Therefore, an object of the present invention is to prevent a silent state when an external device
that performs audio output via an interface is connected.
[0007]
The present invention has been made to solve the above problems, and a first aspect of the
present invention is a computer device that outputs an audio signal, a speaker device that
outputs the audio signal as audio, the computer device, and the above A computer system
comprising a speaker device connected to an interface for transmitting the audio signal from the
computer device to the speaker device, wherein the speaker device detects connection to the
computer device by the interface. A detection means; and volume increase request means for
requesting the computer device to increase the output volume of the audio signal through the
interface when the connection is detected, the computer device receiving the request The above
audio signal is output up to the maximum volume while A computer system characterized by
comprising a volume control means for increasing the volume.
This causes the speaker device to request an increase in sound volume when the connection with
the computer device is detected, and in response to this, the output sound volume is increased in
the computer device.
[0008]
In the first aspect, the volume increase request means starts the request after the first period has
elapsed since the connection was detected, and the request after the second period has elapsed
after the start of the request. May be released. Here, the first period can assume a period
sufficient to initialize the connection between the computer device and the speaker device. In
addition, the second period can be assumed to be a period sufficient to increase the output
volume of the audio signal from the minimum volume to the maximum volume by the volume
control means. That is, by providing a sufficient preparation period from the connection
detection to the volume increase request and providing the volume increase request period as a
sufficient period until reaching the maximum volume, the operation required for volume control
is stabilized. Bring about the effect.
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[0009]
In addition, in the first aspect, the computer device is connected to the speaker device by the
mute state holding means for holding the presence or absence of the mute state for muting the
output of the audio signal regardless of the output volume and A second connection detecting
means for detecting an alarm, and a warning indicating that the muffling state holding means is
in a muffling state when the connection is detected by the second connection detecting means
The information processing apparatus may further comprise warning generation means for
generating a warning, and display means for displaying the warning generated by the warning
generation means. As a result, when the computer device is in the muffling state, the effect is
raised to urge the cancellation of the muffling state.
[0010]
A second aspect of the present invention is a speaker device connected to a computer device for
outputting an audio signal through an interface and outputting the audio signal as audio, the
speaker device being connected to the computer device by the interface. Connection detection
means for detecting the volume, and volume increase request means for requesting the computer
apparatus to increase the output volume of the audio signal via the interface when the
connection is detected. It is a speaker device. As a result, when the connection with the computer
device is detected, an increase in volume is requested from the speaker device, and the output
sound volume in the computer device is increased.
[0011]
A third aspect of the present invention is a volume control method in a speaker device connected
to a computer device for outputting an audio signal through an interface and outputting the
audio signal as an audio, the computer device by the interface A connection detection procedure
for detecting connection, a first period lapse determination procedure for determining that the
first period has elapsed since the connection was detected, and a determination that the first
period has elapsed A volume increase request start procedure for starting a request to increase
the output volume of the audio signal to the computer device via the interface when being
performed, and a second period has elapsed since the start of the request A second period
elapsing determining procedure for determining the volume volume increase request for
canceling the request when it is determined that the second period of time has elapsed Is a
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program for causing to execute a volume control method or these steps, characterized in a
computer that includes a removal procedure. This causes the speaker device to request an
increase in sound volume when the connection with the computer device is detected, and in
response to this, the output sound volume is increased in the computer device.
[0012]
According to the present invention, it is possible to achieve an excellent effect of being able to
prevent the silent state by increasing the volume of the system level when an external device that
performs audio output via an interface is connected.
[0013]
Next, embodiments of the present invention will be described in detail with reference to the
drawings.
[0014]
FIG. 1 is a diagram showing an example of an appearance configuration of a computer system
according to an embodiment of the present invention.
The computer system includes a computer 200 and a speaker 100, and the computer 200 and
the speaker 100 are connected by an interface 300.
Here, a so-called personal computer (PC) is assumed as the computer 200, and a USB interface
for transmitting digital signals is assumed as the interface 300.
[0015]
The speaker 100 is connected to the computer 200 by the interface 300 to output sound. The
speaker 100 is a stereo compatible speaker having a left speaker 101 and a right speaker 102.
The speaker 100 has its own volume 103 so that the volume can be adjusted without operation
by the computer 200.
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[0016]
FIG. 2 is a diagram showing an example of the internal configuration of a computer system
according to an embodiment of the present invention. The speaker 100 includes a connection
detection unit 110, a volume increase request unit 120, a volume adjustment unit 130, and an
output unit 140. The computer 200 further includes a connection detection unit 210, a volume
control unit 220, and a volume amplifier 230.
[0017]
The connection detection unit 110 of the speaker 100 detects connection to the computer 200
via the interface 300. When the connection detection unit 110 detects a connection, the
connection detection unit 110 notifies the volume increase request unit 120 that the connection
is detected.
[0018]
When notified by the connection detection unit 110 that the connection has been detected, the
volume increase request unit 120 starts outputting a volume increase request signal to the
computer 200 after a predetermined time has elapsed. The time from the connection detection to
the output start of the volume increase request signal is referred to as "volume increase request
start time". The “volume increase request start time” is a preparation period sufficient to
initialize the connection between the computer 200 and the speaker 100, and can assume, for
example, about 2.5 seconds.
[0019]
Further, the volume increase request unit 120 stops the output of the volume increase request
signal after a predetermined time has elapsed since the output of the volume increase request
signal is started. The time from the start of the output of the volume increase request signal to
the stop thereof is referred to as "volume increase request time". The “volume increase request
time” is a period sufficient for the volume control unit 220 to increase the volume from the
minimum volume to the maximum volume, and can assume, for example, about 6 seconds.
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[0020]
The volume adjuster 130 adjusts the volume of the audio signal output from the computer 200
in accordance with the volume 103.
[0021]
The output unit 140 outputs an audio signal whose volume is adjusted by the volume adjustment
unit 130 as physical audio, and corresponds to the left speaker 101 and the right speaker 102.
[0022]
The connection detection unit 210 of the computer 200 detects that the speaker 100 is
connected or disconnected via the interface 300.
When the connection detection unit 210 detects connection or disconnection, the connection
detection unit 210 notifies the volume control unit 220 that connection or disconnection has
been detected.
[0023]
When notified by the connection detection unit 210 that the connection of the speaker 100 has
been detected, the volume control unit 220 initializes the volume amplifier 230 to enable output
of an audio signal.
Also, when notified that the disconnection of the speaker 100 is detected from the connection
detection unit 210, the volume control unit 220 saves the state of the volume amplifier 230 for
the next initialization of the volume amplifier 230. Therefore, the volume control unit 220
includes a volume storage unit 221, and is used for saving and restoring (initializing) the state of
the volume amplifier 230 (the degree of volume and the presence or absence of mute).
[0024]
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The specific content of the initialization of the volume amplifier 230 differs depending on the
audio driver of the system. For example, the state may be restored to the state immediately
before the previous disconnection, or may be initialized to a medium volume regardless of the
previous state.
[0025]
Further, when an instruction regarding volume adjustment is received from the speaker 100, the
volume control unit 220 controls the volume amplifier 230 to perform the volume adjustment
according to the instruction. For example, upon receiving the output of the volume increase
request signal from the volume increase request unit 120, the volume control unit 220 increases
the volume in the volume amplifier 230.
[0026]
The volume amplifier 230 amplifies the volume of the sound source under the control of the
volume control unit 220 and outputs it as an audio signal. Further, the volume amplifier 230 can
set the mute state (silence state), and when the mute state holding unit 231 holds that "the mute
state" is held, the sound is generated regardless of the volume level. No signal is output.
[0027]
FIG. 3 is a diagram showing an example of signal transition in the computer system according to
the embodiment of the present invention.
[0028]
When the speaker 100 is connected to the computer 200 via the interface 300, in the connection
detection unit 110 of the speaker 100 and the connection detection unit 210 of the computer
200, the connection detection signal is enabled as shown in FIG. 3A.
[0029]
The volume increase request unit 120 enables the volume increase request signal as shown in
FIG. 3B after the “volume increase request start time” has elapsed since the connection
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detection.
Thus, the volume control unit 220 increases the volume in the volume amplifier 230 as shown in
FIG. 3 (c).
However, the volume in the volume amplifier 230 has an upper limit value, and the increase
operation of the volume is stopped when the volume is at the maximum.
[0030]
Thereafter, after the "volume increase request time" has elapsed since the start of the volume
increase request, the volume increase request unit 120 invalidates the volume increase request
signal as shown in FIG. 3 (b). Thereby, the volume in the volume amplifier 230 is maintained at
the maximum volume.
[0031]
FIG. 4 is a diagram showing an example of a circuit configuration of the connection detection
unit 110 and the volume increase request unit 120 of the speaker 100 according to the
embodiment of the present invention. Here, a USB interface is assumed as the interface 300, and
an example using the IC 150 that operates according to the USB interface protocol is shown.
[0032]
The USB interface is a serial bus interface, and there is one logical data. However, physically,
transmission by the operation signal is performed by the signal lines 301 and 302. The positive
polarity signal by the signal line 301 is connected to the data input terminal D + of the IC 150,
and the negative polarity signal by the signal line 302 is connected to the data input terminal
D− of the IC 150.
[0033]
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Also, two more control signal lines 303 and 304 are used for the USB interface. The signal line
303 is for supplying power, and is connected to the power receiving terminal VBUS of the IC
150. The signal line 304 indicates a ground level as a digital signal, and is connected to the
ground terminal DGND of the IC 150.
[0034]
The IC 150 has terminals VCOM and VOL + other than the USB interface in order to control the
USB interface by the four signal lines described above. The terminal VCOM indicates a reference
voltage. The terminal VOL + is a terminal for instructing to increase the volume. This terminal
VOL + conforms to HID (Human Interface Device) which is a control protocol in the USB
interface, and when the terminal VOL + is set to a valid state, a command (Volume Increment)
requesting a volume increase is the USB interface. It is output to.
[0035]
The circuit connected to the IC 150 includes capacitors 161 to 165, resistors 171 to 179, and
transistors 181 to 183. The following describes these operations.
[0036]
When the speaker 100 is connected to the computer 200 via the interface 300, the voltage at the
base terminal of the npn transistor 181 gradually increases due to the resistors 171 and 172 and
the capacitors 162 and 163 that constitute the integration circuit. As a result, the npn transistor
181 is turned on, and the voltage at the right end of the capacitor 164 goes low.
[0037]
At this time, since the capacitor 164 is not charged, the voltage at the base terminal of the pnp
transistor 182 also goes low, and the pnp transistor 182 also turns on. As a result, the terminal
VOL + goes high. When the terminal VOL + becomes high level, the IC 150 starts outputting a
command requesting the computer 200 to increase the volume through the signal lines 301 and
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302. The time from the connection to this is the "volume increase request start time", and for
example, about 2.5 seconds can be assumed. During the USB interface, a configuration operation
for confirming connected devices is performed.
[0038]
Since the capacitor 165 is not charged at this time, the voltage at the base terminal of the npn
transistor 183 also becomes high level, and the npn transistor 183 also turns on.
[0039]
Thereafter, the capacitor 164 is charged, but since the npn transistor 183 is in the on state, the
terminal VOL + is maintained at the high level for a while.
[0040]
Thereafter, the capacitor 165 is charged, whereby the voltage at the base terminal of the npn
transistor 183 becomes low.
Thus, the npn transistor 183 is turned off.
As a result, the terminal VOL + goes low. When the terminal VOL + becomes low level, the IC 150
cancels the output of the command requiring the volume increase. The time from the start of
output of a command requiring volume increase to this is the "volume increase request time",
and, for example, about 6 seconds can be assumed.
[0041]
FIG. 5 is a flow chart showing an example of the flow of the processing procedure by the speaker
100 according to the embodiment of the present invention. First, when the connection detection
unit 110 detects that the connection is made to the computer 200 via the interface 300 (step S
911), clocking of “volume increase request start time” starts (step S 912). Then, when the
“volume increase request start time” has elapsed, the volume increase request unit 120 starts
to output a command for requesting a volume increase (step S 913).
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[0042]
When the request for volume increase is started, clocking of "volume increase request time"
starts (step S914). Then, when the “volume increase request time” has elapsed, the command
for requesting the volume increase by the volume increase request unit 120 is released (step S
915).
[0043]
FIG. 6 is a flowchart showing an example of the flow of processing procedures by the computer
200 according to the embodiment of this invention. First, when the connection detection unit
210 detects that the speaker 100 is connected via the interface 300 (step S 921), the volume
control unit 220 determines the state of the volume amplifier 230 (degree of volume and
presence / absence of mute etc.) initialize. Although the specific content of the initialization
differs depending on the audio driver of the system as described above, it is assumed here that it
is restored to the state just before the previous disconnection. That is, the volume control unit
220 restores the state of the volume amplifier 230 stored in the volume storage unit 221 (step
S922).
[0044]
Thereafter, the volume control unit 220 controls the state of the volume amplifier 230 according
to the command from the speaker 100 (step S930). Then, when the connection detection unit
210 detects that the connection with the speaker 100 is disconnected (step S926), the volume
control unit 220 saves the state of the volume amplifier 230 in the volume storage unit 221 (step
S 927).
[0045]
FIG. 7 is a flowchart showing an example of the procedure of volume control processing (step
S930 in FIG. 6) by the computer 200 according to the embodiment of this invention. The volume
control process is a steady process while the speaker 100 is connected via the interface 300, and
controls the state of the volume amplifier 230 according to a command from the speaker 100.
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[0046]
If the command from the speaker 100 is a volume increase request (step S 931), the volume
control unit 220 increases the volume of the volume amplifier 230 (step S 932). On the other
hand, if the command from the speaker 100 is a volume reduction request (step S933), the
volume control unit 220 decreases the volume of the volume amplifier 230 (step S934).
[0047]
If the command from the speaker 100 is a mute setting request (step S935), the volume control
unit 220 mutes the volume of the volume amplifier 230 (step S936). On the other hand, if the
command from the speaker 100 is a mute release request (step S937), the volume control unit
220 releases the mute state of the volume amplifier 230 (step S938).
[0048]
Although the content of the entire volume control process has been described here, the
embodiment of the present invention focuses on the volume increase request command output
from the volume increase request unit 120 of the speaker 100.
[0049]
That is, according to the embodiment of the present invention, when the speaker 100 is
connected to the computer 200 via the interface 300, the connection detection unit 110 detects
the connection, and the volume is increased after the "volume increase request start time" has
elapsed. The request unit 120 outputs a volume increase request command to the computer 200.
When receiving the volume increase request command, the volume control unit 220 of the
computer 200 increases the volume of the volume amplifier 230 to the maximum volume. The
output of the volume increase request command from the volume increase request unit 120 is
canceled after the “volume increase request time” has elapsed.
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[0050]
Next, a modification of the embodiment of the present invention will be described with reference
to the drawings.
[0051]
FIG. 8 is a diagram showing a modification of the internal configuration of the computer system
according to the embodiment of the present invention.
The modification in FIG. 8 differs from the configuration in FIG. 2 in that a warning generation
unit 280 and a display unit 290 are shown in the computer 200.
[0052]
The warning generation unit 280 generates a screen display warning that the volume amplifier
230 is in the mute state. When the warning generation unit 280 is notified that the connection of
the speaker 100 is detected from the connection detection unit 210, the warning generation unit
280 refers to the state of the volume amplifier 230, and for example, as shown in FIG. Generate a
display screen like.
[0053]
The display unit 290 displays the screen output from the computer 200, and is realized by, for
example, a display such as an LCD (Liquid Crystal Display). In the embodiment of the present
invention, display unit 290 displays the display screen generated by warning generation unit
280.
[0054]
FIG. 9 is a view showing an example of the display screen 291 generated by the warning
generation unit 280 in the modification of the embodiment of the present invention. The display
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screen 291 includes characters warning that the computer 200 is in the mute state. When in the
mute state, no sound is output from the output unit 140 even if the volume is increased by the
volume increase request unit 120 in the embodiment of the present invention. Therefore, by
displaying this display screen 291, it is possible to inform the user that the mute state is set, and
to urge the release of the mute state.
[0055]
Further, the display screen 291 may be provided with a button 292 for releasing the mute state.
This makes it possible to urge cancellation of the mute state without putting a burden on the
user.
[0056]
FIG. 10 is a flowchart showing an example of the flow of the processing procedure by the
computer 200 in the modification of the embodiment of the present invention. When the
connection detection unit 210 detects that the speaker 100 is connected via the interface 300
(step S941), the volume control unit 220 restores the state of the volume amplifier 230 (step
S942). Is the same as
[0057]
As a result of restoring the state of the volume amplifier 230, if the volume amplifier 230 is in
the mute state (step S943), that is, if the mute state holding unit 231 holds that the "mute state"
is held, as shown in FIG. A mute warning display like this is generated by the warning generation
unit 280 and displayed on the display unit 290 (step S 944).
[0058]
Thereafter, until the connection with the speaker 100 is disconnected (step S946), the volume
control unit 220 controls the state of the volume amplifier 230 according to a command from
the speaker 100 (step S950). The point at which the state of the volume amplifier 230 is
evacuated to the volume storage unit 221 (step S947) is the same as that of the example of FIG.
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The contents of the volume control process (step S950) are the same as the volume control
process (step S930) shown in FIG.
[0059]
In this modification, the processing procedure of the speaker 100 is the same as that shown in
FIG.
[0060]
As described above, according to the modification of the embodiment of the present invention, in
addition to increasing the volume at the time of connection, the warning generation unit 280
generates a warning display and displays it on the display unit 290. On the other hand, it can
notify that it is in the mute state, and can prompt cancellation of the mute state.
[0061]
The embodiment of the present invention shows an example for embodying the present
invention, and as shown below, it has correspondences with the invention specific matters in the
claims, respectively, but is limited thereto Various modifications can be made without departing
from the scope of the present invention.
[0062]
That is, in claim 1, the computer device corresponds to, for example, the computer 200.
Further, the speaker device corresponds to, for example, the speaker 100.
Also, the interface corresponds to the interface 300, for example.
The connection detection unit corresponds to, for example, the connection detection unit 110.
Further, the volume increase request means corresponds to the volume increase request unit
120, for example. Further, the volume control means corresponds to, for example, the volume
control unit 220.
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[0063]
Further, in claim 2, the first period corresponds to, for example, the volume increase request start
time. The second period corresponds to, for example, the volume increase request time.
[0064]
In the seventh aspect, the mute state holding means corresponds to the mute state holding unit
231, for example. The second connection detection unit corresponds to, for example, the
connection detection unit 210. Further, a warning generation unit corresponds to, for example,
the warning generation unit 280. Further, the display means corresponds to the display unit 290,
for example.
[0065]
Furthermore, in claim 9, the computer device corresponds to, for example, the computer 200.
Further, the speaker device corresponds to, for example, the speaker 100. Also, the interface
corresponds to the interface 300, for example. The connection detection unit corresponds to, for
example, the connection detection unit 110. Further, the volume increase request means
corresponds to the volume increase request unit 120, for example.
[0066]
The computer apparatus corresponds to, for example, the computer 200. Further, the speaker
device corresponds to, for example, the speaker 100. Also, the interface corresponds to the
interface 300, for example. A connection detection procedure corresponds to, for example, step
S911. In addition, a first period lapse determination procedure corresponds to, for example, step
S912. Further, the volume increase request start procedure corresponds to, for example, step
S913. Further, the second period lapse determination procedure corresponds to, for example,
step S914. The volume increase request cancellation procedure corresponds to, for example, step
S915.
[0067]
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The processing procedure described in the embodiment of the present invention may be
regarded as a method having a series of these procedures, and a program for causing a computer
to execute the series of procedures or a recording medium storing the program. You may think of
it as
[0068]
It is a figure showing an example of appearance composition of a computer system in an
embodiment of the invention.
It is a figure which shows the example of an internal structure of the computer system in
embodiment of this invention. It is a figure which shows the example of a transition of the signal
in the computer system in embodiment of this invention. It is a figure which shows the circuit
structural example of the connection detection part 110 of the speaker 100 in embodiment of
this invention, and the sound volume increase request | requirement part 120. FIG. It is a
flowchart which shows an example of the flow of the process sequence by the speaker 100 in
embodiment of this invention. It is a flowchart which shows an example of the flow of the
processing procedure by the computer 200 in embodiment of this invention. It is a flowchart
which shows an example of a flow of sound volume control processing (step S930 of FIG. 6)
procedure by the computer 200 in embodiment of this invention. It is a figure which shows the
modification of the internal structure of the computer system in embodiment of this invention. It
is a figure which shows an example of the display screen 291 produced | generated by the
warning production | generation part 280 in the modification of embodiment of this invention. It
is a flowchart which shows an example of the flow of the process sequence by the computer 200
in the modification of embodiment of this invention.
Explanation of sign
[0069]
Reference Signs List 100 speaker 101 left speaker 102 right speaker 103 volume 110
connection detection unit 120 volume increase request unit 130 volume adjustment unit 140
output unit 161 to 165 capacitor 171 to 179 resistor 181 to 183 transistor 200 computer 210
connection detection unit 220 volume control unit 221 volume Storage unit 230 Volume
amplifier 231 Mute status holding unit 280 Warning generation unit 290 Display unit 300
Interface
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