Sound Diffusion (WHO 22)
The Sound Diffusion system (WHO=22) is composed of various devices for audio distribution and control in Open Web Net protocol networks.
System Components¶
The system includes:
- Sources for audio signal generation and processing
- Speakers for audio output and local control
- Amplifiers for signal distribution and enhancement
Each device is identified by a different WHERE address and supports various multimedia types.
Device Addressing (WHERE)¶
| WHERE | Description |
|---|---|
2#<sourceID> |
Source (sourceID=[1-4]) |
3#<area>#<point> |
Speaker (area=[1-9], point=[1-9]) |
4#<area> |
Speaker Area (area=[1-9]) |
5#<sender_address> |
General |
6 |
All Source |
Commands (WHAT)¶
| WHAT | Description |
|---|---|
0 |
Turn off |
1 |
Turn on |
2 |
Source turned on |
3 |
Increase volume |
4 |
Decrease volume |
5 |
Automatic tuner search towards higher frequencies |
6 |
Manual tuner search towards lower frequencies |
9 |
Go to a following station |
10 |
Go to a previous station |
11 |
Go to a following track |
12 |
Go to a previous track |
22 |
Sliding request |
31 |
Ask a source to start telling RDS message |
32 |
Ask a source to stop telling RDS message |
33 |
Store the presently tuned frequency on a certain station |
34 |
Turn ON Amplifier with follow me method |
35 |
Turn ON Amplifier to a certain source |
36 |
Increment Low Tones |
37 |
Decrement Low Tones |
38 |
Increment Mid Tones |
39 |
Decrement Mid Tones |
40 |
Increment High Tones |
41 |
Decrement High Tones |
42 |
Increment balance (left>right) |
43 |
Decrement balance (left<right) |
55 |
Next Preset |
56 |
Previous Preset |
Dimensions (DIMENSION)¶
| DIMENSION | Description |
|---|---|
1 |
Volume |
2 |
High Tones |
3 |
Medium Tones |
4 |
Low Tones |
5 |
Frequency |
6 |
Track/station |
7 |
Play status |
11 |
Frequency and Station |
12 |
Device state |
17 |
Balance |
18 |
3D |
19 |
Preset |
20 |
Loudness |
Parameter Definitions¶
Multimedia Types (<mmtype>)¶
| Value | Description |
|---|---|
1 |
Voice |
2 |
Canal Right |
3 |
Canal Left |
4 |
Canal Stereo |
11 |
All Source |
Frequency Parameters¶
| Parameter | Range | Description |
|---|---|---|
<freqStep> |
[1-15] | Frequency step (1=50Hz, 2=100Hz, ..., 15=750Hz) |
<freqValue> |
Variable | Frequency of the selected station |
<modulation> |
[1-4] | 1=FM, 2=AM-LW, 3=AM-MW, 4=AM-SW |
Audio Control Parameters¶
| Parameter | Range | Description |
|---|---|---|
<volumeStep> |
[1-31] | Volume step increase |
<volume> |
[0-31] | Volume level |
<tonesValue> |
[1-63] | Tone values |
<balanceValue> |
[1-63] | Balance values |
<3dLevel> |
[0-10] | Level of 3D effect |
<loudness> |
[0-1] | 0=OFF, 1=ON |
Preset Types (<presetType>)¶
| Value | Description |
|---|---|
2 |
Normal |
3 |
Dance |
4 |
Pop |
5 |
Rock |
6 |
Classic |
7 |
Techno |
8 |
Party |
9 |
Soft |
10 |
Full bass |
11 |
Full treble |
16-25 |
User defined preset |
Device States¶
| Parameter | Range | Description |
|---|---|---|
<deviceState> |
[0-1] | 0=OFF, 1=ON |
<station> |
[1-5] | Number of memorized station (F500) |
<track> |
[1-999] | Track number to select |
Source Control Commands¶
Turn Source OFF¶
Client → Server: *22*0#<mmtype>#<area>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*2#<sourceID>*12*<deviceState>*<mmtype>##
Turn Source ON¶
Client → Server: *22*1#<mmtype>#<area>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*2#<sourceID>*12*<deviceState>*<mmtype>##
Client ← Server: *22*21#<mmtype>#<area>*5#2#<sourceID>##
Client ← Server: *22*2#<mmtype>#<area>*5#2#<sourceID>##
Frequency Control¶
Frequency Up (Automatic)¶
Client → Server: *22*5#*2#<sourceID>##
Client ← Server: *#*1##
Frequency Up (Manual Step)¶
Client → Server: *22*5#<freqStep>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*where*5*<modulation>*<freqValue>##
Frequency Down (Automatic)¶
Client → Server: *22*6#*2#<sourceID>##
Client ← Server: *#*1##
Frequency Down (Manual Step)¶
Client → Server: *22*6#<freqStep>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*where*5*<modulation>*<freqValue>##
Station/Track Navigation¶
Next Station¶
Client → Server: *22*9#*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station>##
Client ← Server: *#22*2#<sourceID>*6*<station>##
Previous Station¶
Client → Server: *22*10#*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station>##
Client ← Server: *#22*2#<sourceID>*6*<station>##
Next Track¶
Client → Server: *22*11#*2#<sourceID>##
Client ← Server: *#*1##
or with step:
Client → Server: *22*11#<freqStep>*2#<sourceID>##
Client ← Server: *#*1##
Note: Source allowed: Aux, Multimedia SCS Source
Previous Track¶
Client → Server: *22*12#*2#<sourceID>##
Client ← Server: *#*1##
or with step:
Client → Server: *22*12#<freqStep>*2#<sourceID>##
Client ← Server: *#*1##
Note: Source allowed: Aux, Multimedia SCS Source
Source Selection¶
Go To Source¶
Client → Server: *22*22#<mmtype>#<area>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station>##
Client ← Server: *#22*2#<sourceID>*6*<station>##
RDS Control¶
Start RDS Message¶
Client → Server: *22*31#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*where*10*VAL1*VAL2*VALn##
Note: Source allowed: radio
Stop RDS Message¶
Client → Server: *22*32#<sourceID>##
Client ← Server: *#*1##
Note: Source allowed: radio
Store Station¶
Client → Server: *22*33#<station>*2#<sourceID>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station>##
Client ← Server: *#22*2#<sourceID>*6*<station>##
Note: Source allowed: radio
Speaker Control Commands¶
Basic Speaker Control¶
Turn Speaker OFF¶
Client → Server: *22*0#<mmtype><area>*3#<area><point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Turn Speaker ON¶
Client → Server: *22*1#<mmtype><area>*3#<area><point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
Volume Control¶
Increase Volume¶
Client → Server: *22*3#<volumeStep>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
Decrease Volume¶
Client → Server: *22*4#<volumeStep>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
Advanced Speaker Control¶
Turn ON with Follow Me¶
Client → Server: *22*34#<mmtype>#<area>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *22*2#<mmtype>#<area>*5#2#<sourceID>##
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Turn ON Amplifier to Certain Source¶
Client → Server: *22*35#4#<area>#<sourceID>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *22*21#<mmtype>#<area>*5#2#<sourceID>##
Client ← Server: *22*2#<mmtype>#area*5#2#<sourceID>##
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
Tone Control¶
Low Tone Control¶
Increment Low Tones¶
Client → Server: *22*36#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Decrement Low Tones¶
Client → Server: *22*37#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Mid Tone Control¶
Increment Mid Tones¶
Client → Server: *22*38#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*3*<tonesValue>##
Decrement Mid Tones¶
Client → Server: *22*39#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*3*<tonesValue>##
High Tone Control¶
Increment High Tones¶
Client → Server: *22*40#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Decrement High Tones¶
Client → Server: *22*41#<tonesValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Balance Control¶
Increment Balance (Left > Right)¶
Client → Server: *22*42#<balanceValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*17*<value>##
Decrement Balance (Left < Right)¶
Client → Server: *22*43#<balanceValue>*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*17*<value>##
Preset Control¶
Next Preset¶
Client → Server: *22*55##<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Client ← Server: *#22*3#<area>#<point>*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point>*21#1*<band>##
Client ← Server: *#22*3#<area>#<point>*21#2*<band>##
Client ← Server: *#22*3#<area>#<point>*21#3*<band>##
Previous Preset¶
Client → Server: *22*56##<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Client ← Server: *#22*3#<area>#<point>*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point>*21#1*<band>##
Client ← Server: *#22*3#<area>#<point>*21#2*<band>##
Client ← Server: *#22*3#<area>#<point>*21#3*<band>##
Status Requests¶
Source Status Request¶
Client → Server: *#22*<where>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*2#<sourceID>*12*<deviceState>*<mmtype>##
Note: If where is 5#2#sourceID in status request then we have a dimension 12 for each source and speaker
Speaker Status Request¶
Client → Server: *#22*3#<area>#<point>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Dimension Writing Commands¶
Source Dimension Writing¶
State Memorized Station (Dimension=11)¶
Client → Server: *#22*5#2#<sourceID>*#11*<modulation>*<freqValue>*<station>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station>##
Device State (Dimension=12)¶
Client → Server: *#22*5#2#<sourceID>*#12*<deviceState>*<mmtype>##
Client ← Server: *#*1##
Speaker Dimension Writing¶
Volume (Dimension=1)¶
Client → Server: *#22*3#<area>#<point>#1*<volumeStep>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#16*<area><point>*1*<volume>##
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
High Tones (Dimension=2)¶
Client → Server: *#22*3#<area>#<point>#2*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*4##
Medium Tones (Dimension=3)¶
Client → Server: *#22*3#<area>#<point>#3*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*4##
Low Tones (Dimension=4)¶
Client → Server: *#22*3#<area>#<point>#4*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*4##
Device State (Dimension=12)¶
Client → Server: *#22*3#<area>#<point>*#12*<deviceState>*<mmtype>##
Client ← Server: *#*1##
Balance (Dimension=17)¶
Client → Server: *#22*3#<area>#<point>*#17*<balanceValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*17*<balanceValue>##
Preset (Dimension=19)¶
Client → Server: *#22*3#<area>#<point>*#19*<presetType>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point*19*<presetType>##
Client ← Server: *#22*5#3#<area>#<point*21#<equalization1>*<band>##
Client ← Server: *#22*5#3#<area>#<point*21#<equalization2>*<band>##
Client ← Server: *#22*5#3#<area>#<point*21#<equalization3>*<band>##
Loudness (Dimension=20)¶
Client → Server: *#22*3#<area>#<point>*#20*<loudness>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point>*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Dimension Request Commands¶
Source Dimension Requests¶
State Frequency (Dimension=5)¶
Client → Server: *#22*5#2#<sourceID>*5##
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*2#<sourceID>*11*<modulation>*<freqValue>*<station(or track)>##
State Station/Track (Dimension=6)¶
Client → Server: *#22*5#2#<sourceID>*6##
Client ← Server: *#22*5#2#<sourceID>*6*<station(or track)>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*2#<sourceID>*6*<station(or track)>##
Client ← Server: *#22*2#<sourceID>*11*<modulation>*<freqValue>*<station(or track)>##
State Memorized Station (Dimension=11)¶
Client → Server: *#22*5#2#<sourceID>*11##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station(or track)>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*5#2#<sourceID>*5*<modulation>*<freqValue>##
Client ← Server: *#22*5#2#<sourceID>*11*<modulation>*<freqValue>*<station(or track)>##
Device State (Dimension=12)¶
Client → Server: *#22*5#2#<sourceID>*12##
Client ← Server: *#22*2#<sourceID>*12*<deviceState>*<mmtype>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*2#<sourceID>*12*<deviceState>*<mmtype>##
Speaker Dimension Requests¶
Volume (Dimension=1)¶
Client → Server: *#22*3#<area>#<point>*1##
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#16*<area><point>*1*<volume>##
Client ← Server: *#22*3#<area>#<point>*1*<volume>##
High Tones (Dimension=2)¶
Client → Server: *#22*3#<area>#<point>*2##
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*3*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Medium Tones (Dimension=3)¶
Client → Server: *#22*3#<area>#<point>*3##
Client ← Server: *#22*3#<area>#<point>*3*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*3*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Low Tones (Dimension=4)¶
Client → Server: *#22*3#<area>#<point>*4##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*2*<tonesValue>##
Client ← Server: *#22*3#<area>#<point>*4*<tonesValue>##
Device State (Dimension=12)¶
Client → Server: *#22*3#<area>#<point>*12##
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *16*3*<area><point>##
Client ← Server: *#22*3#<area>#<point>*12*<deviceState>*<mmtype>##
Balance (Dimension=17)¶
Client → Server: *#22*3#<area>#<point>*17##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*17*<balanceValue>##
Preset (Dimension=19)¶
Client → Server: *#22*3#<area>#<point>*19##
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point>*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Loudness (Dimension=20)¶
Client → Server: *#22*3#<area>#<point>*20##
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#*1##
Event Response:
Client ← Server: *#22*3#<area>#<point>*20*<loudness>##
Client ← Server: *#22*3#<area>#<point>*18*<3dLevel>##
Client ← Server: *#22*3#<area>#<point>*19*<presetType>##
Audio Control Workflow¶
The following Mermaid diagram shows the typical audio control workflow:
flowchart TD
A[Client Request] --> B{Device Type}
B -->|Source| C[Source Control]
B -->|Speaker| D[Speaker Control]
C --> C1[Power Control]
C --> C2[Frequency Control]
C --> C3[Station/Track Control]
C --> C4[RDS Control]
D --> D1[Power Control]
D --> D2[Volume Control]
D --> D3[Tone Control]
D --> D4[Balance Control]
D --> D5[Preset Control]
C1 --> E[Send Command]
C2 --> E
C3 --> E
C4 --> E
D1 --> E
D2 --> E
D3 --> E
D4 --> E
D5 --> E
E --> F[Server Processing]
F --> G[Acknowledgment]
F --> H[Event Messages]
G --> I[Command Complete]
H --> I
Communication Flow¶
The following sequence diagram shows the typical communication flow:
sequenceDiagram
participant C as Client
participant S as Server
participant D as Device
C->>S: Command Request (*22*WHAT*WHERE##)
S->>D: Process Command
D->>S: Device Response
S->>C: Acknowledgment (*#*1##)
S->>C: Event Messages (*#22*...)
Note over C,D: Status and dimension requests follow similar pattern
C->>S: Status Request (*#22*WHERE##)
S->>D: Query Status
D->>S: Current Status
S->>C: Status Response (*#22*WHERE*DIMENSION*VALUE##)
S->>C: Acknowledgment (*#*1##)
Copyright Notice¶
Copyright (C) 2014 www.myopen-legrandgroup.com. All Rights Reserved.
License¶
By using and/or copying this document, you (the licensee) agree that you have read, understood, and will comply with the following terms and conditions:
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