[LAU] strange behaviour with novation launchpad

Kaspar Bumke kaspar.bumke at gmail.com
Fri Jul 13 15:55:56 UTC 2012


>
> Every once in a while, it's the other way around, I have to press a grid
> button before the arrow pads start sending.
>

And here I was too thinking I was doing something wrong to cause this in my
LP.

Only two keys are ambiguous without a status byte: both have 0x68 as the
> first
>
data byte
>

It really annoys me that they have CC 0x68 and note 0x68, if it wasn't for
that you could ignore the message type for whatever you do.

When I got my LP I wrote a python extension and class that uses
> it directly via libusb, without going via ALSA, and it  solves
> the problem, except if the first event has data byte 0x68.
>

So f I understand it correctly then the only problem remaining with this is
the two 0x68 keys not working until you press another key? Do you think we
could add a similar solution into the ALSA driver?
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