Alcorn Mcbride 8 TraXX Скачать руководство пользователя страница 31

 

Troubleshooting Guide 

 

 

Q:

 I’ve copied several files from my PC onto a Compact Flash, but they do not play. 

A

: The Compact Flash may have been pre-formatted in a way that is incompatible 

with the 8TRAXX operating system.  Refer to the Formatting section of the manual 
to find out how to format the media. 

Q:

 When playing back files, the audio seems to jump from one file to the next, 

interrupting the currently playing file in the middle. 

A:

 The media has become fragmented.  Format the media in the 8TRAXX and then 

re-copy all the files to it. 

Q:

 It seems that the 8TraXX is not responding to a Stop command very quickly.  It 

sometimes takes seconds for the sound to stop after issuing the command or  
pressing the front panel button. 

A:

 The sound file has a corrupted or missing sequence header.  Try re-encoding the 

file. 

Q:

 When skipping between files on a single track I hear pops and squeaks in the 

audio. 

A:

 Make sure that all sound files played to a track have identical encoding 

parameters (i.e. bitrate, sample frequency, encoding format, etc.). 

Q:

 When skipping between files on a single track, there is a long delay between 

when I issue the play command and the sound actually starts playing. 

A:

 The MP3 data files you are playing might contain larger than normal data packet 

sizes.  The 8TraXX waits until a sequence header (at the beginning of a data packet) 
comes along when playing a file before “seaming” to another file.  If the data 
packets are too long, the 8TraXX has to play a lot of data before finding a header.  
Try re-encoding the file using a different encoder to reduce the packet size. 

Q:

 Why can’t I get more than a few channels to play at once?  When I start the fifth 

channel, channels 3 and 4 stop playing.   

A: 

Your bandwidth may be too high.  See the section labeled “Bandwidth 

Limitations” in the “Making MP3’s” section for details. 

 

 

 

For the answers to other questions, check out the Alcorn McBride Knowledge Base 
at 

http://www.alcorn.com/kb

 

If you don’t find it there, please email our technical support staff at 

[email protected]

 

 

August 8, 2006     •   Alcorn McBride 8TraXX User’s Manual    •    Rev 1.8      •  

Page 5 

Содержание 8 TraXX

Страница 1: ...8 TraXX Eight Independent MP3 Players User s Guide...

Страница 2: ...n applications where a malfunction can reasonably be expected to result in personal injury Customers using or selling Alcorn McBride products for use in such applications do so at their own risk and a...

Страница 3: ...August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8 Page iii...

Страница 4: ...le to Channel__________________________________________________________________ 7 Loop Play__________________________________________________________________________ 7 Assign Sound____________________...

Страница 5: ...August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8 Page v...

Страница 6: ......

Страница 7: ...ers the latest in Digital Audio Repeater technology combining MP3 audio with Compact Flash for a rugged reliable maintenance free solution to your playback needs Access time is nearly instantaneous Al...

Страница 8: ...Page 2 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 9: ...ill be activated and played out the corresponding channel Pressing a button once plays the sound Pressing it again while the sound is playing stops playback Holding the button down causes the sound to...

Страница 10: ...edia activity It illuminates whenever the Compact Flash media is being accessed The LED is also used for error indication refer to error indication section below Error Indications The Channel Status L...

Страница 11: ...pectively Repeatedly activating a play input while a channel is playing will restart the channel It is possible to prevent sounds from restarting during play by adding 1000 to the sound number i e Sou...

Страница 12: ...near the power connector Ground Lift In the event of AC hum or noise this switch may be set to the off position to isolate the 8TraXX circuit ground from the chassis Contacts Voltage Inputs Be sure t...

Страница 13: ...the channel number in ASCII Message Response R CR Comments If no sound number is specified the number specified with the last Select File command see below will be used Sound numbers 1 through 511 ar...

Страница 14: ...e time using the assigned sound numbers for each channel specified by a previous Select File command Command Bytes ncSE CR or nncSE CR or nnncSE CR or nnnncSE CR where n nn nnn or nnnn is the sound nu...

Страница 15: ...current version of the installed firmware Note The firmware version can also be obtained by holding down the 8th front panel channel button as power is applied to the 8TraXX The channel LEDs on the f...

Страница 16: ...in the show controller starting at the flag number designated by the flag offset parameter This parameter is in HEX and has a range of 0x40 to 0x77 variable offset WAK CR Selects Variable Offset Mode...

Страница 17: ...ered the correct command Check for avail E11 Media Not Present Is the Compact Flash inserted Formatted A recommended brand E12 Search Error Selecting the correct file Is the file on the card Is it nam...

Страница 18: ...Page 12 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 19: ...e space requirements The most common bitrate is bolded Bitrate Kbps Quality File Size min Original WAV Best quality achievable is whatever the source is 10 47Mbytes 80 FM radio quality 594Mbytes 96 Ne...

Страница 20: ...Page 14 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 21: ...ssage Format Status Byte Control Number Control Value Function Status Byte control change Control Number Range Control Value Range Play Channel 176 64 71 select channels 1 8 1 122 selects sound number...

Страница 22: ...Page 16 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 23: ...lowed to be interrupted while playing and start over or if it should keep playing through to completion and ignore incoming play requests Sound numbers 1001 to 1511 are uninterruptible meaning that re...

Страница 24: ...Page 18 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 25: ...and copy your MP3 files to that directory Sounds can be numbered as shown below SND00001 MP3 up to SND09999 MP3 Interruptible versus Uninterruptible Operation With files in the sounds subdirectory an...

Страница 26: ...Page 20 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 27: ...no Supports all the MPEG 1 and 2 sampling frequencies and the extension to MPEG 2 5 including 48 44 1 32 24 22 05 16 12 11 025 8 KHz Accepts MPEG 2 5 Layer III MP3 elementary compressed bitstreams wit...

Страница 28: ...Page 2 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 29: ...hicle power connection A windows program GPS Builder is used to capture geographical points and make a playlist which resides on the Compact Flash card installed in the AM4 or DVM7400 You can download...

Страница 30: ...Page 4 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 31: ...rack have identical encoding parameters i e bitrate sample frequency encoding format etc Q When skipping between files on a single track there is a long delay between when I issue the play command and...

Страница 32: ...Page 6 August 8 2006 Alcorn McBride 8TraXX User s Manual Rev 1 8...

Страница 33: ...C 100 F free air circulation 0 90 relative humidity non condensing 20 g max Vibration with removable Compact Flash Card Controls Test Button for each track Mute All button Playing LED for each track...

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