Unfortunately, it seems that sp555 uses a different usb audio chipset and I can't modify the 555 driver, BUT I'll keep testing (I have a good feeling!).
EDIT1:The intsuction below are no longer needed
The bad news so far:
No midi driver...
The good news (yes there are some)
Sp-606 can be used as a generic usb audio interface:
Press menu->4:USB Audio/MIDI->Vender Driver OFF
Hold "FUNC" ,Press "EXIT"->F3 and PowerOff the beast
PowerOn and 606 is installed as a wdm audio device.
Download asio4all : http://www.asio4all.com/ and install it!
Open your DAW and select wdm driver and choose sp-606.
Make sure the driver is on 16-bit mode!
If your DAW does not support wdm choose asio4all.There is a possibility that the sp606 does not appear. If so, open the control panel of Asio4All and select the sp606 on the advanced settings
Ok!I think I did it
Thanks to linux midi drivers http://www.linux-usb.org/usb.ids , I picked a driver close to sp606 and although the Edirol's PCR where working ,it had separate midi device.So the only chance was Boss GS-10 as Roland changed the chip on the SP-555 (thanks ellaguru for testing!).
So ,I had to modify some files and I realized that the digital signature of Roland's driver is gone.So first step:
Disable driver signature enforcement on win7,8x64:
http://laslow.net/2012/03/14/disable-driver-signature-enforcement-in-windows-8/
1.Type "cmd" on the search field(if you are on win8 http://www.classicshell.net/ is a must)
Right-click "cmd" and run it as administrator
Give the following 2 commands:
bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit -set TESTSIGNING ON
reboot and we are ready for installation
2. Open device manager and look for unknown devices and disable them.
3.Download the driver attached and extract somewhere you find it easy.
4.Turn on SP-606 and on menu->Usb Audio/Midi ,make sure "Vender Driver" is on.If it was 'off' turn it on,shutdown sp-606,and power on again.
5.On the device manager look for the new unknown device(hi 606!) and right-click->properties->driver->update->don't search->have disk and goto folder where you extracted the driver.
Ignore the warnings and install.
6.Reboot the pc and open a DAW you like.On wdm,wave,directx and wasapi drivers sp-606 is listed normally.Same for midi IO ,and asio panel. But on Asio choose "GS-10" as the device since I can't find a fucking way to mod it directly...But it works!
7.To return to the initial state of signed drivers we open "cmd" as admins and give the following 2 commands:
bcdedit -set loadoptions ENABLE_INTEGRITY_CHECKS
bcdedit -set TESTSIGNING OFF
(thanks to ellaguru for mention it)
Reboot the system
8.(Optional).Open regedit and search for ASIO.This is the place where your asio devices are listed.Check for "GS-10" and on the right panel on "Description" replace it with SP-606.You can check the picture inside the driver to help you out.Now your sp-606 is named correctly.
9.Make some beats!
Tested on Windows Vista , 7 ,8 _64bit.
Enjoy and
Happy new Year!
EDIT: Mac users can disable vender driver on the usb audio menu settings on 606 and use it as generic audio interface but with no midi (yet