musical tux


Portable Music Player Manager

About the digisette AR-100 Logo

So in my efforts to add support for the digisette AR-100 in linux, here is a page where I describe what I know about tit . This page is not very organized. You have been warned.

Form factor

The digisette has a standard compact cassette form factor. It looks and mimics a tape. It also has a phone jack so you can plug in your  head phones right in to it. I wanted it because I a can easily take mp3s to my car. I mostly use it to listen to radio shows. You can use stuff from the linux show or or of course your favorite mp3s.

Connection to computer

According to /proc/bus/usb/devices:
T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs=  1
P:  Vendor=05b4 ProdID=6001 Rev= 0.01
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=01(O) Atr=02(Bulk) MxPS=  32 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  32 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS=   8 Ivl=0ms

So the Vendor is 05b4h and the product ID is 6001h. Yet once initialized on windows the product ID changes to 6002h.

It also seems to report that it is compatible with USB 1.0.

As a side note, it seems that the irock! 520 mp3 player uses the same chipset as the duo as it identifies it self the same way (Vendor=05b4 ProdID=6001 Rev= 0.01). Windows uses the "HMS30C6001" driver. I think this is the Semiconductor Group of Hyundai Electronics Industries CO., LTD. The product and vendor ID for both of these mp3 players is the default according to this web page.


I don't know much about the protocol yet. I've looked at a few USB bus logs using snoopy pro on a windows system.

I know that the internal memory is following some kind of fat16 format but it doesn't seem to  have  an MBR. Also the player OS is stored on the flash in a few hidden files (MCUSN16.IMG, MP3SN16.IMG, HWISN16.IMG and WMASN16.IMG ). Every time you do a low level format of the internal flash these files get rewritten. They use about 600 KB of memory from the internal 32 MB of memory.

The MMC that I have is a 64MB. It follows  a  standard disk format with an MBR, a partition table and FAT (FAT16).

It seems that the long filename implementation is not 100% to spec. The short version (8.3) of the long file names should never exist more than once on a disk. It seems that the digisette implementation doesn't follow that so for example if you have two file, hugefilename1.mp3 and hugefilename2.mp3 then the short version of the name for both of these files becomes HUGEFI~1.MP3. The correct way to do it would be HUGEFI~1.MP3 and HUGEFI~2.MP3


If you want to able to use the digisette with linux and you don't want to wait around for me to get mousikos to support it here is a workaround:  Go get yourself a USB reader that supports the USB mass storage protocol and an MMC card. Then write to MMC card with the writer and pop it in the AR-100. I got myself a KTI 6-in-1 Internal Flash Card Reader/Writer. I got this for two reasons. One, they advertise that it works with Linux and two, it brings a USB port to the front of my computer.

I hope this information is useful to someone. If you want to help with AR-100 support, other digisette models or mousikos in general  please contact me:

sopho at users  sourceforge  net

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