[Ardour-Users] please review tranzport patch [was: state of tranzport support?]

Jörn Nettingsmeier nettings at stackingdwarves.net
Mon Dec 1 04:26:40 PST 2008

hi giso!

many thanks for your help. the patch works like a charm here.
can i ask the ardour devs to review this patch for inclusion?



Giso Grimm wrote:
> Hi,
> to fix the problem you described you should apply the patch appended to
> bug #1797. This will fix both the deadlock in the control_protocol
> module and the reachability of all tracks/busses.
> The user-space driver (based on libusb) for the Tranzport can not
> properly handle an event overflow, which will result in a link breakdown
> (and slow recovery from that) if the input events can not be handled
> quick enough. Mike Taht is the author of the tranzport interface, he
> suggested to use either the kernel space driver. We also discussed to
> use an external tranzport-to-OSC controller application, which could use
> a more reliable Tranzport-interface (actually I wrote a extremely simple
> tranzport2midi interface which can be used as a generic Midi control
> surface, but unfortunately without any feedback like track names and
> input level: http://vegri.net/tranzport2midi.zip - undocumented and very
> limited, but much better link performance).
> Giso
> Jörn Nettingsmeier wrote:
>> hi everyone!
>> a friend gave me a tranzport to play around with that he's not using at
>> the moment, and of course i hooked it up to ardour.
>> the basic functionality is there and it really is quite nice, but
>> stepping through the channels does not work. specifically, i have this
>> weird session here that consists of a 4ch master, two 6ch monitor busses
>> and one 4ch track. i can only step through the busses, not the channel,
>> and when i'm at the master track and try to go backward one more, ardour
>> goes haywire: 100% cpu, sloppy playback, mouse lags by tens of seconds.
>> at that point, i need to restart ardour usually.
>> reason i'm writing is: the concept of a low-level hardware driver in
>> ardour does strike me as odd - before i buy a tranzport myself, is there
>> reasonable hope that this thing will stay supported? or had i better get
>> me a generic midi controller with machine control buttons?
>> best,
>> jörn

Jörn Nettingsmeier

Verantwortlicher für Veranstaltungstechnik

Audio and event engineer
Ambisonic surround recordings

nettings at stackingdwarves.net
+49 177 7937487

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