Thanks all for your help. I'll keep you updated if I ever get anything
working...
2007/11/30, Adam Davison <[EMAIL PROTECTED]>:
>
> Thanks. I wrote that e-mail from my phone on the train so svn browse
> wasn't available.
>
> I should also add that you may need to tweak exactly what message gets
> sent since I can't remember exactly what I did there. I imagine it's
> not to difficult to follow though. Like Albert said feel free to mail
> the list or me personally.
>
> Adam
>
> On 30/11/2007, Albert Santoni <[EMAIL PROTECTED]> wrote:
> > And just to fill in some details on what Adam said...
> >
> > The Windows MIDI code is located in midiobjectwin.cpp, and the Linux
> > code is in midiobjectalsaseq.cpp. The function you need to implement in
> > MidiObjectAlsaSeq is "sendShortMsg()", and you'll find the Windows
> > implementation of it is two lines, like Adam said. :)
> >
> > If you haven't already, you'll probably also want to check out the
> > "Hercules DJ Console Mk2.midi.xml" which supports the LEDs on that
> > device. (Look for the XML <lights>/<light> blocks.)
> >
> > Anyways, if you get stuck, don't be afraid to send any of us (or
> > mixxx-devel) an email.
> >
> > Thanks!
> >
> > Albert
> >
> > On Fri, 2007-11-30 at 09:50 +0000, Adam Davison wrote:
> > > Hi Oriol,
> > >
> > > Good to hear you're planning on working on this. Basically you just
> > > have to implement one function in the midi code. Look at the windows
> > > version for an example.
> > >
> > > On windows, all i had to do was open the device for output as well as
> > > input and then the function to send was around two lines, so this is
> > > probably a great project for someone wanting to get back into coding
> > > like yourself.
> > >
> > > Although we're now sort of in beta i imagine this is a small enough
> > > change to go into 1.6.0.
> > >
> > > Adam
> > >
> > > On 30/11/2007, Oriol Puigbó <[EMAIL PROTECTED]> wrote:
> > > > Hi,
> > > >
> > > > I also got a BCD3000 last week and I'm trying to get everything
> working on
> > > > Ubuntu Gutsy, although I haven't much free time so I can't promise
> anything.
> > > > Using the xml file that Ric sent, most buttons are working fine.
> What is
> > > > left to do is getting the leds and the rotatory wheels to work. I've
> started
> > > > with the leds.
> > > >
> > > > The BCD3000 manual explains all the command changes that should be
> sent to
> > > > the console to turn leds on and off.
> > > >
> > > > For my initial tests, I've choosen one led, labelled CUE B.
> According to the
> > > > manual, I have to send a Control Change to MIDI CC No. 1 with a
> value higher
> > > > than 63 to turn it on, and a value lower than 64 to turn it off.
> I've been
> > > > playing with the command "aplaymidi" and after getting a well formed
> midi
> > > > file for sending these values, I can turn the led on and off from a
> > > > terminal. So it should be possible to get it working on Linux.
> > > >
> > > > Now I'm open to any suggestions for moving forward. It is my
> understanding
> > > > from some previous messages I've seen on this list that mixxx
> doesn't know
> > > > how to send midi control changes in Linux. So I plan to study a
> little bit
> > > > the "aplaymidi" source code to try to discover the code used to send
> the
> > > > commands, and then try to integrate it in mixxx. However it's been
> ages
> > > > since I last coded anything so I'm not sure I'll be able to get it
> working.
> > > >
> > > > If you have any suggestions on an easiest way forward it would be
> much
> > > > appreciated.
> > > >
> > > > Cheers,
> > > >
> > > > Oriol
> > > >
> > > >
> > > > >
> > > > > 2007/11/22, Richard Morgan < [EMAIL PROTECTED]>:
> > > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I unfortunately work in an evil retail empire which means I will
> have no
> > > > > > free time to do anything until after Christmas! If you want to
> include
> > > > the
> > > > > > xml file that's fine by me but some more work will be needed to
> get the
> > > > > > BCD3000 fully supported.
> > > > > >
> > > > > > Cheers
> > > > > >
> > > > > > Ric
> > > > > >
> > > > > > ----- Original Message ----
> > > > > > From: Albert Santoni <[EMAIL PROTECTED]>
> > > > > > To: Richard Morgan <[EMAIL PROTECTED] >
> > > > > > Cc: mixxx-devel <[email protected]>
> > > > > > Sent: Monday, 19 November, 2007 4:19:29 PM
> > > > > > Subject: Re: [Mixxx-devel] BCD3000 update
> > > > > >
> > > > > > Hi Richard,
> > > > > >
> > > > > > How far have you gotten with this stuff? Should we be pulling
> this MIDI
> > > > > > mapping in for the 1.6.0 beta release?
> > > > > >
> > > > > > Thanks,
> > > > > > Albert
> > > > > >
> > > > > > On Tue, 2007-10-23 at 18:25 +0000, Richard Morgan wrote:
> > > > > > > Hi,
> > > > > > >
> > > > > > > A "first draft" for supporting the BCD3000 midi controller is
> > > > > > available here:
> > > > > > >
> > > > > > > http://www.ricland.co.uk/mixxx/BCD3000.midi.xml
> > > > > > >
> > > > > > > I have the basic functions working (ie all faders and most
> buttons
> > > > > > with relevant functions). Unfortunately there is no midi send
> support in
> > > > > > the linux alsa midi drivers which has rather stalled the mapping
> of the
> > > > > > leds. There is also a data request midi command which can be
> sent to
> > > > > > return all of the midi cc values from the controller, this would
> be
> > > > > > handy to synchronise the onscreen controls to the positions of
> the
> > > > > > hardware
> > > > > > controls on startup.
> > > > > > >
> > > > > > > The spread64 controller does work for the rotary controls but
> gives
> > > > > > quite sluggish performance as it uses the 63/65 values as stop
> values so
> > > > > > moving the wheel slowly doesn't produce any result. Also the
> midi
> > > > > > events generated don't always finish with a 63/65 which leaves
> the
> > > > > > pointer
> > > > > > "creeping". In terms of resolution a quarter turn of the wheel
> produces
> > > > > > approx 24 midi events. Rather than using a timer, as suggested
> > > > > > previously, you could define an interval, say 1/20 of a second,
> and have
> > > > > > a
> > > > > > formula something like
> > > > > > >
> > > > > > > seek = interval * (<midi cc value> - 64)
> > > > > > >
> > > > > > > My only problem with using a timer is that the wheel would
> overshoot
> > > > > > waiting for the end of a timer period. The interval method has
> the
> > > > > > disadvantage of introducing the steps of the interval length but
> > > > > > hopefully
> > > > > > we can choose an interval which is small enough to provide fine
> > > > > > adjustment but then with enough acceleration to make fast
> scrolling
> > > > > > possible.
> > > > > > >
> > > > > > > The only other small issue is that the cue_set button needs 2
> presses
> > > > > > to set the cue point, which seems strange.
> > > > > > >
> > > > > > > In terms of audio outputs in linux using the generic alsa-usb
> module
> > > > > > provides one four channel output device which can be routed as
> two
> > > > > > stereo outputs (main and headphone) the latency in linux also
> seems to
> > > > > > be
> > > > > > fairly low by default. The instruction manual confirms that four
> channel
> > > > > > output in windows is only available using the asio drivers, the
> wdm
> > > > > > direct sound driver only supports 2 channel output, ie headphone
> and
> > > > > > main
> > > > > > are cloned. The latency using these drivers is pretty high
> though. I
> > > > > > have tried using a separate 6 channel usb soundcard but you can
> only
> > > > > > choose one output device and it only produces stereo output. I
> think
> > > > > > this
> > > > > > is a limitation of the Tracktor LE software but I don't want to
> pay for
> > > > > > the full version without guarantees.
> > > > > > >
> > > > > > > It is rather unfortunate as the hardware is very good and
> tracktor LE
> > > > > > should be quite competent. It seems only a small proportion of
> laptop
> > > > > > computers are affected (My laptop is the only of my 3 computers
> with
> > > > > > windows installed and the one I really wanted to use the BCD3000
> with.),
> > > > > > but the whole package is let down in my case by the asio driver
> issue.
> > > > > > The support forum on behringer's website contains more
> information
> > > > > > about which laptops are affected and assures me that they are
> working on
> > > > > > a
> > > > > > fix for the problem.
> > > > > > >
> > > > > > > It's not all doom and gloom though as I now have enough
> working to
> > > > > > use mixxx and linux to get the four channel audio output from
> the unit.
> > > > > > >
> > > > > > > Now is probably not the best time to admit this but my c++
> skills are
> > > > > > beginner at best, I wonder if anyone else is working on getting
> the
> > > > > > alsa midi output working? I am certainly willing to put some
> effort into
> > > > > > getting this working myself but it's going to take some time to
> get my
> > > > > > c skills up to scratch. I am rather throwing myself in at the
> deep end
> > > > > > so any pointers on where to start would be appreciated.
> > > > > > >
> > > > > > > I'll leave it there for now.
> > > > > > >
> > > > > > > Ric
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
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