Now playing wiki entry

NowPlaying_V0.3.0.md

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+**Version:** 0.3.0 and newer
+
+Now Playing
+---
+The **Now Playing** tab provides a convenient summary screen to monitor when you
+are decoding channels and monitoring audio.  It displays a summary of channels and
+provides access to decoding details, messages and call events for each channel.
+
+![Figure 1: Application Overview with Now Playing Displayed](images/ApplicationOverview_V0.3.0.png)
+**Figure 1:** Application Overview with Now Playing tab
+
+Decoding Channel Table
+---
+The table at the top of the Now Playing screen provides a summary of all channels that you have 
+enabled for decoding.  The table contains the following columns:
+
+#### State
+Indicates the current state of the channel's primary and secondary decoders:
+* **CALL** - a radio call is in progress
+* **CONTROL** - a trunked radio control channel is being decoded
+* **DATA** - a radio data call is in progress
+* **ENCRYPTED** - an encrypted radio call is in progress
+* **FADE** - temporary state when a call has ended before changing to IDLE state
+* **IDLE** - the decoder is running
+* **OVERFLOW** - temporary error when the computer is unable to keep up with the incoming 
+data rate.  When this occurs frequently, consider reducing the number of decoding channels
+that you have enabled
+* **RESET** - temporary state when the decoders are being reset
+* **TEARDOWN** - temporary state when a traffic channel call has ended and the channel is 
+being removed
+
+#### Decoder
+Primary decoder specified in the channel configuration.  Any auxiliary decoders that you have enabled
+for the channel will not be displayed here.
+
+#### Channel
+Diplays the logical Channel identifier for trunked radio systems.
+
+#### Frequency
+Tuned frequency for the channel
+
+#### Primary From
+Primary decoder radio or talkgroup identifier for the (FROM) part of a radio call.
+
+#### Primary To
+Primary decoder radio or talkgroup identifier for the (TO) part of a radio call.
+
+#### Secondary From
+Secondary (auxiliary) decoder radio or talkgroup identifier for the (FROM) part of a radio call.
+
+#### Secondary To
+Secondary (auxiliary) decoder radio or talkgroup identifier for the (TO) part of a radio call.
+
+#### Channel Name
+Channel name from the channel configuration.  Note: traffic channels that are automatically created
+when decoding a trunked radio control channel will display _TRAFFIC_.
+
+#### Message
+Any decoded status, GPS, or text message from the Primary and Auxiliary decoders.
+
+Channel Information
+---
+The lower half of the **Now Playing** screen shows additional information when you select/click on a 
+row in the channels table above.
+
+![Figure 2: Now Playing with Channel Details View](images/NowPlayingDetailsView_V0.3.0.png)
+**Figure 2:** Now Playing with Channel Details View
+
+Details View
+---
+The details view provides summary information from each of the primary and auxiliary decoders
+for the channel.  Primary decoder summary information is displayed first and a section is added
+to the bottom of the report for each additional auxiliary decoder that is configured for the
+channel.
+
+The channel configuration System, Site and Channel name are displayed across the top of the 
+detail view.
+
+**Note:** the format of the detail summary report is different for each decoder.
+
+#### Refresh Button
+The summary report is generated when you first select a channel and click on the details view.
+You can regenerate the report with the latest summary information from the decoders when you
+click on the **Refresh** button.
+
+![Figure 3: Now Playing with Channel Events View](images/NowPlayingEventsView_V0.3.0.png)
+**Figure 3:** Now Playing with Channel Events View
+
+Events View
+---
+The events view details any events decoded from either the primary decoder or from any of the
+auxiliary decoders that may be included in the channel configuration.
+
+#### Time
+Timestamp or time range of the event
+
+#### Event
+Event description.  
+
+#### From
+Identifier of the radio or entity for the FROM part of the event.
+
+#### (From) Alias
+Optional alias corresponding to the **From** identifier.
+
+#### To
+Identifier of the radio or entity for the TO part of the event
+
+#### (To) Alias
+Optional alias corresponding to the **To** identifier
+
+#### Channel
+Logical channel identifier for the event
+
+#### Frequency
+Channel frequency for the event
+
+#### Details
+Message, GPS location, status, or additional details about the event.
+
+![Figure 4: Now Playing with Channel Messages View](images/NowPlayingMessagesView_V0.3.0.png)
+**Figure 4:** Now Playing with Channel Messages View
+
+Messges View
+---
+The channel messages table displays messages being decoded by the primary decoder for the
+channel.
+
+#### Time
+Time for the message
+
+#### Protocol
+Radio protocol being decoded
+
+#### Error Check
+Indicates if sections of the message were decoded without errors (*) or if sections of the 
+message were corrected (C)
+
+#### Message
+Textual representation of the decoded message.
+
+#### Binary
+Textual representation of the binary (0 or 1) decoded message.
+
+**Note:**
+Viewing the real-time messages decoding adds to the computer's processing workload.  When you 
+are viewing the messages, each message is being fully parsed.  When you are not viewing the
+message display, the computer is only parsing the minimum information that it needs from 
+each message.