lsusb just reports that the device is there and that it's connected. The system might just not know what to do with it.

Could you unplug the device and plug it back in? Paste what the dmesg command outputs. Maybe it's not being assigned properly.

Hello Trixar_za,
Thanks for the response.

I paste part of the dmesg output (the lines which refer to the USB ports), I cut them because of the number (>300).
If you don't see anything, I'll post everything.

John.

.//

DMESG OUTPUT (last 118 lines)

...
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci_hcd 0000:00:10.4: PCI INT C -> GSI 21 (level, low) -> IRQ 21
ehci_hcd 0000:00:10.4: EHCI Host Controller
ehci_hcd 0000:00:10.4: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:10.4: irq 21, io mem 0xfad00000
ehci_hcd 0000:00:10.4: USB 2.0 started, EHCI 1.00
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 8 ports detected
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
uhci_hcd: USB Universal Host Controller Interface driver
uhci_hcd 0000:00:10.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21
uhci_hcd 0000:00:10.0: UHCI Host Controller
uhci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 2
uhci_hcd 0000:00:10.0: irq 21, io base 0x0000b800
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
uhci_hcd 0000:00:10.1: PCI INT A -> GSI 21 (level, low) -> IRQ 21
uhci_hcd 0000:00:10.1: UHCI Host Controller
uhci_hcd 0000:00:10.1: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:10.1: irq 21, io base 0x0000c000
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
uhci_hcd 0000:00:10.2: PCI INT B -> GSI 21 (level, low) -> IRQ 21
uhci_hcd 0000:00:10.2: UHCI Host Controller
uhci_hcd 0000:00:10.2: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:10.2: irq 21, io base 0x0000c400
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
uhci_hcd 0000:00:10.3: PCI INT B -> GSI 21 (level, low) -> IRQ 21
uhci_hcd 0000:00:10.3: UHCI Host Controller
uhci_hcd 0000:00:10.3: new USB bus registered, assigned bus number 5
uhci_hcd 0000:00:10.3: irq 21, io base 0x0000c800
usb usb5: configuration #1 chosen from 1 choice
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
mice: PS/2 mouse device common for all mice
input: PC Speaker as /devices/platform/pcspkr/input/input0
cpuidle: using governor ladder
cpuidle: using governor menu
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
TCP cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
Using IPI No-Shortcut mode
input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: ATA-7: SAMSUNG HD080HJ, WT100-41, max UDMA7
ata1.00: 156301488 sectors, multi 16: LBA48 NCQ (depth 0/32)
ata1.00: configured for UDMA/133
scsi 0:0:0:0: Direct-Access ATA SAMSUNG HD080HJ WT10 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors: (80.0 GB/74.5 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sda:<5>sd 0:0:0:0: Attached scsi generic sg0 type 0
sda1 sda2
sd 0:0:0:0: [sda] Attached SCSI disk
usb 4-1: new full speed USB device using uhci_hcd and address 2
input: ImPS/2 Generic Wheel Mouse as /devices/platform/i8042/serio1/input/input2
ata2: SATA link down 1.5 Gbps (SStatus 0 SControl 300)
EXT3-fs: INFO: recovery required on readonly filesystem.
EXT3-fs: write access will be enabled during recovery.
usb 4-1: configuration #1 chosen from 1 choice
usb 4-1: USB disconnect, address 2
kjournald starting. Commit interval 5 seconds
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with writeback data mode.
VFS: Mounted root (ext3 filesystem) readonly on device 8:2.
Freeing unused kernel memory: 328k freed
usb 4-1: new full speed USB device using uhci_hcd and address 3
usb 4-1: configuration #1 chosen from 1 choice
EXT3 FS on sda2, internal journal
udev: starting version 150
VIA 82xx Audio 0000:00:11.5: PCI INT C -> GSI 22 (level, low) -> IRQ 22
VIA 82xx Audio 0000:00:11.5: setting latency timer to 64
codec_read: codec 0 is not valid [0xfe0000]
codec_read: codec 0 is not valid [0xfe0000]
codec_read: codec 0 is not valid [0xfe0000]
codec_read: codec 0 is not valid [0xfe0000]
VIA 82xx Modem 0000:00:11.6: enabling device (0000 -> 0001)
VIA 82xx Modem 0000:00:11.6: PCI INT C -> GSI 22 (level, low) -> IRQ 22
VIA 82xx Modem 0000:00:11.6: setting latency timer to 64
VIA 82xx Modem 0000:00:11.6: PCI INT C disabled
VIA 82xx Modem: probe of 0000:00:11.6 failed with error -13
Linux agpgart interface v0.103
agpgart-amd64 0000:00:00.0: AGP bridge [1106/0204]
agpgart-amd64 0000:00:00.0: AGP aperture is 64M @ 0xf0000000
Adding 3905528k swap on /dev/sda1. Priority:-1 extents:1 across:3905528k
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
usbip_common_mod: module is from the staging directory, the quality is unknown, you have been warned.
usbip_common_mod: usbip common driver1.0<4>usbip: module is from the staging directory, the quality is unknown, you have been warned.
usbip 4-1:1.0: this device 4-1 is not in match_busid table. skip!
usbcore: registered new interface driver usbip
usbip:Stub Driver for USB/IP:1.0
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
usb 4-1: USB disconnect, address 3
usb 3-2: new full speed USB device using uhci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
usbip 3-2:1.0: this device 3-2 is not in match_busid table. skip!
Generic RTC Driver v1.07
usb 3-2: USB disconnect, address 2
usb 4-1: new full speed USB device using uhci_hcd and address 4
usb 4-1: configuration #1 chosen from 1 choice
usbip 4-1:1.0: this device 4-1 is not in match_busid table. skip!

Two things I find interesting is:
usbip_common_mod: module is from the staging directory, the quality is unknown, you have been warned.
usbip_common_mod: usbip common driver1.0<4>usbip: module is from the staging directory, the quality is unknown, you have been warned.

And:
usb 4-1: new full speed USB device using uhci_hcd and address 4
usb 4-1: configuration #1 chosen from 1 choice
usbip 4-1:1.0: this device 4-1 is not in match_busid table. skip!

For the last one, try typing:
echo 'add 4-1' > /sys/bus/usb/drivers/usbip/match_busid
and
echo '4-1' > /sys/bus/usb/drivers/usbip/match_busid
in your terminal (changing the 4-1 to whatever dmesg says the device number is now is now) and see if that does anything (I'm asking you to do both, because I'm actually unsure how it expects you to add the number). From what I've read it might be a bug in that module.

Alternatively, you may need to connect your device to the proper channel using the aconnect command. Links about it is found here:
http://www.headphonedeals.com/joomla/tmresearch/38-catresearch/99-korg-nanokey-review
http://alsa.opensrc.org/index.php/Aconnect

There is also a GUI interface for it called aconnectgui, but it seems to be mostly Debian and Ubuntu based. It could probably be converted over to SliTaz if somebody takes the time to do it.

Hi Trixar_za
I tried your first alternative, and didn't have deal.

I am going to compile aconnectgui, to check out if this problem can be solved, and have a try installing Zynaddsub-FX, and see how it goes.

Thank you for your kind help, any advance I have with these duties it will be posted here in this thread.

See you.