[linux-audio-user] USB MIDI and Audio

[Joseph Zitt]

I'm pleased to say that the Oxygen 8 now works with my RedHat-based
laptop, after installing the latest stuff from Planet CCRMA. The 
only problem is that now my USB Audio interface fails.

ALSA appears to be starting OK:

[root at gimel jzitt]# /etc/rc.d/init.d/alsasound start
Starting sound driver snd-usb-audio                        [  OK  ]
Starting sound driver snd-usb-audio                        [  OK  ]
Starting sequencer driver snd-seq-midi                     [  OK  ]
Restoring sound driver settings                            [  OK  ]
[root at gimel jzitt]# 

But jack hangs:

[root at gimel jzitt]# jackstart -R -d alsa -d hw -r 44100 
jackd 0.41.1
Copyright 2001-2002 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
loading driver ..
creating alsa driver ... hw|1024|2|44100|swmon
starting engine
cannot lock down memory for RT thread (Cannot allocate memory)
**** alsa_pcm: xrun of at least 0.074 msecs

(and there it sits until I do a ^C)

I'm also seeing an error from lsusb for the Audio interface:

Bus 001 Device 012: ID 0582:0006 Roland Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0 Interface
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0582 Roland Corp.
  idProduct          0x0006 
  bcdDevice            1.10
  iManufacturer           1 Roland
  iProduct                2 UA-30 (44100Hz, Analog REC)
  iSerial                 0 
  bNumConfigurations      1
cannot get config descriptor 0, Connection timed out (110)
  Language IDs: (length=4)
     0409 English(US)

...though the Oxygen 8 looks OK:

Bus 001 Device 011: ID 0763:1015 Midiman 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0 Interface
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0763 Midiman
  idProduct          0x1015 
  bcdDevice            1.20
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           39
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xa0
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize         32
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize         32
        bInterval               0
      Endpoint Descriptor:
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize         32
        bInterval               0
  Language IDs: (length=4)
     0409 English(US)


Does this suggest anything (other than what we could tell from my
earlier posts)?

-- 
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