[linux-audio-user] usb midi midiman 8x8

[R Parker]

Hi,

I thought it'd worth following this up by letting
everyone know that the 8x8 is setup, working and being
used to route mmc and mtc messages.

Linux Environment
I'm running jack and ardour with an external digital
mixer. The mixer is sending mmc transport instructions
to ardour and ardour returns mtc which keeps the
transports synchronized. MMC bindings between the
mixer channel faders and ardour mixer strips is
working.

The next addition to my environment will probably be
MUSE because I believe it has some midi sync
capabilities. I hope to MUSE:MIDI-clock_out ->
external hardware sequencer/sampler. I probably won't
get around to this for a couple weeks.

Patrick, if you write a howto for installing the
hotplug and usb firmware perhaps we should include
information for configuring the setup that I've got.
I'd be happy to help at your request. I have a sense
that we could get Clemens to help explain my
configuration. :)

ron

--- R Parker <rtp405 at yahoo.com> wrote:
> Hi Clemens,
> 
> I thought it'd be interesting for you to know that
> Patrick Shirkey and I got the USB Midiman 8x8 setup
> installed on my machine:
> >aconnect -i 
> client 0: 'System' [type=kernel]
>     0 'Timer           '
>     1 'Announce        '
> client 72: 'Rawmidi 1 - M Audio Audiophile 24/96
> MPU-401' [type=kernel]
>     0 'M Audio Audiophile 24/96 MPU-401'
> client 80: 'Rawmidi 2 - MidiSport 8x8' [type=kernel]
>     0 'MidiSport 8x8 Port 0'
>     1 'MidiSport 8x8 Port 1'
>     2 'MidiSport 8x8 Port 2'
>     3 'MidiSport 8x8 Port 3'
>     4 'MidiSport 8x8 Port 4'
>     5 'MidiSport 8x8 Port 5'
>     6 'MidiSport 8x8 Port 6'
>     7 'MidiSport 8x8 Port 7'
>     8 'MidiSport 8x8 Port 8'
> >aconnect -o
> client 72: 'Rawmidi 1 - M Audio Audiophile 24/96
> MPU-401' [type=kernel]
>     0 'M Audio Audiophile 24/96 MPU-401'
> client 80: 'Rawmidi 2 - MidiSport 8x8' [type=kernel]
>     0 'MidiSport 8x8 Port 0'
>     1 'MidiSport 8x8 Port 1'
>     2 'MidiSport 8x8 Port 2'
>     3 'MidiSport 8x8 Port 3'
>     4 'MidiSport 8x8 Port 4'
>     5 'MidiSport 8x8 Port 5'
>     6 'MidiSport 8x8 Port 6'
>     7 'MidiSport 8x8 Port 7'
>     8 'MidiSport 8x8 Port 8'
> 
> I haven't used the device yet but will within a day.
> 
> A potential stumbling block for this setup is the
> kernel usb module choice of ohci for AMD vs uhci for
> Intel. We thought it might be worth mentioning in
> the
> README.
> 
> Something we've noticed is that aconnect is seeing
> ports 0 -> 8. Of course that would appear to be nine
> i/o ports. Is that correct?
> 
> Anyway, we wanted to thank you for the code.
> 
> ron
> 
> --- Clemens Ladisch <clemens at ladisch.de> wrote:
> > R Parker wrote:
> > > Do you see any advantage to using a pci card or
> > usb;
> > > is  interupt overhead lower in one or the other,
> > etc,
> > > etc,?
> > 
> > USB has a latency of 1ms due to the frame-based
> > communications, the
> > latency on the PCI bus is certainly lower.
> > 
> > 
> > HTH
> > Clemens
> > 
> > 
> 
> 
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