Re: BOSS RC-300

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output of sudo lsusb -v:

Bus 001 Device 003: ID 0582:0138 Roland Corp. Boss RC-300 (Audio mode)
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass          255 Vendor Specific Class
   bDeviceSubClass         0
   bDeviceProtocol       255
   bMaxPacketSize0        64
   idVendor           0x0582 Roland Corp.
   idProduct          0x0138 Boss RC-300 (Audio mode)
   bcdDevice            0.00
   iManufacturer           1 BOSS
   iProduct                2 RC-300
   iSerial                 0
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength          176
     bNumInterfaces          4
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0xc0
       Self Powered
     MaxPower                0mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           0
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass    255 Vendor Specific Subclass
       bInterfaceProtocol      0
       iInterface              0
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        1
       bAlternateSetting       0
       bNumEndpoints           0
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      2
       bInterfaceProtocol      2
       iInterface              0
       ** UNRECOGNIZED:  06 24 f1 01 00 00
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        1
       bAlternateSetting       1
       bNumEndpoints           1
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      2
       bInterfaceProtocol      2
       iInterface              0
       ** UNRECOGNIZED:  07 24 01 01 00 01 00
       ** UNRECOGNIZED:  0b 24 02 01 02 04 18 01 44 ac 00
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x0d  EP 13 OUT
         bmAttributes            5
           Transfer Type            Isochronous
           Synch Type               Asynchronous
           Usage Type               Data
         wMaxPacketSize     0x0038  1x 56 bytes
         bInterval               1
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        2
       bAlternateSetting       0
       bNumEndpoints           0
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      2
       bInterfaceProtocol      1
       iInterface              0
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        2
       bAlternateSetting       1
       bNumEndpoints           1
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      2
       bInterfaceProtocol      1
       iInterface              0
       ** UNRECOGNIZED:  07 24 01 07 00 01 00
       ** UNRECOGNIZED:  0b 24 02 01 02 04 18 01 44 ac 00
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x8e  EP 14 IN
         bmAttributes           37
           Transfer Type            Isochronous
           Synch Type               Asynchronous
           Usage Type               Implicit feedback Data
         wMaxPacketSize     0x0038  1x 56 bytes
         bInterval               1
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        3
       bAlternateSetting       0
       bNumEndpoints           2
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      3
       bInterfaceProtocol      0
       iInterface              0
       ** UNRECOGNIZED:  06 24 f1 02 01 01
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x03  EP 3 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               1
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x84  EP 4 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        3
       bAlternateSetting       1
       bNumEndpoints           2
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      3
       bInterfaceProtocol      0
       iInterface              0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x03  EP 3 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               1
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x85  EP 5 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               1
Device Qualifier (for other device speed):
   bLength                10
   bDescriptorType         6
   bcdUSB               2.00
   bDeviceClass          255 Vendor Specific Class
   bDeviceSubClass         0
   bDeviceProtocol       255
   bMaxPacketSize0        64
   bNumConfigurations      1
Device Status:     0x0001
   Self Powered

arecord shows a strange behaviour (probably I'm misunderstanding something?)
$arecord -l
card 0: PCH [HDA Intel PCH], device 0: VT1802 Analog [VT1802 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
card 1: RC300 [RC-300], device 0: USB Audio [USB Audio]
   Subdevices: 1/1
   Subdevice #0: subdevice #0

$arecord -dhw:1 -c2 -fS16_LE -r44100 ~/test.wav
or
$arecord -dhw:1,0 -c2 -fS16_LE -r44100 ~/test.wav

records from my internal soundcard.(also plughw)

About midi:the truth is I don't really understand anything about it, sorry.
The only things I can tell you is that through midi cables to my 
soundcard the device outputs a midi clock and some sysex messages, and I 
never was able to send any cc message to it. I used a program called 
Kmidimon to monitor.
Through USB no sign of life, neither kmidimod neither amidi (but I'm not 
sure which options to use).

If you point me in the right direction I'm willing to do any further 
testing needed.
Thank you.







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