[chuck-users] Chuck's capture of Midi broken?
jwmatthys at gmail.com
Mon Sep 15 01:38:51 EDT 2014
I wonder if there is something about the fact that the note-on and
note-off messages come in fast succession that causes ChucK to miss them
or conflate them.
I'm just guessing here, but it's possible that instead of two 3-byte
messages, ChucK is reading them as one 6-byte message, which can't get
parsed properly. (Are MIDI messages parsed at sample rate? I don't know;
it seems unlikely. But you could try running ChucK at a much higher
sample rate and see what happens.)
If you're feeling ambitious, you could try recompiling ChucK with a
printf in midiio_rtmidi.cpp to see how many bytes are being received.
On 09/15/2014 12:11 AM, Daniel Chapiro wrote:
> Hi Joel,
> The WX5 controller is monophonic, and one plays it like a sax
> (should/can I tell Chuck anything about it being monophonic?). I
> hadn't noticed before that the timing is so close: it's what the WX5
> does when one plays a new note without having broken the stream of air
> (regardless of how slowly).
> Wivi (Wallander Virtual Instruments synthesizer, meant for wind
> controllers) uses this info to choose a legato articulation. Midi
> monitor catches all the events too, but you are right that they are fast.
> However, since all the succeeding CCs do appear correctly in gomidi,
> it seems that Chuck is not losing the synchronization. Hence, if the
> problem is strictly raw speed, shouldn't at least later Key ON events
> show up?
> On Sep 14, 2014, at 9:14 PM, Joel Matthys wrote:
>> Is it possible that your WX5 is in some kind of monophonic mode? Look
>> at the time stamps on your MIDI Monitor output:
>> 20:34:33.*207* From In Note On 1 F2 30
>> 20:34:33.*208* From In Note Off 1 E2 0
>> 20:34:33.*534* From In Note On 1 G2 30
>> 20:34:33.*535* From In Note Off 1 F2 0
>> Your note-offs are always just one tick after the next note-on; that
>> is, essentially simultaneous. There's certainly no audible overlap.
>> On 09/12/2014 07:43 PM, Daniel Chapiro wrote:
>>> Hi - I think that Chuck's Midi methods seem not to be working (except for very simple examples), as Chuck is dropping Midi events - I'm using the pre-compiled version of Chuck 1.3.0 (gidora), on a Mac Mini (2.7GHz I7), with OSX 10.7.5 (Lion).
>>> The only type of ON/OFF sequence in which Chuck seems not to "swallow" any notes is of the form Note1 ON, Note1 OFF, Note2 ON, Note2 OFF… Instead, I'm generating Midi streams in which there are new note On events before the prior note goes off. They happen when I play legato with a Yamaha WX5 wind controller, but any Midi keyboard would also generate such sequences if one presses a new key before releasing another one that is already sounding.
>>> I captured the following short sequence with the "MIDI Monitor" app (http://www.snoize.com/MIDIMonitor/). Also it sounds fine with different sound generators):
>>> 20:34:33.026 From In Note On 1 E2 22
>>> 20:34:33.030 From In Control 1 Breath Control (coarse) 20
>>> 20:34:33.036 From In Control 1 Breath Control (coarse) 25
>>> 20:34:33.041 From In Control 1 Breath Control (coarse) 27
>>> 20:34:33.071 From In Control 1 Breath Control (coarse) 29
>>> 20:34:33.182 From In Control 1 Breath Control (coarse) 30
>>> 20:34:33.207 From In Note On 1 F2 30
>>> 20:34:33.208 From In Note Off 1 E2 0
>>> 20:34:33.534 From In Note On 1 G2 30
>>> 20:34:33.535 From In Note Off 1 F2 0
>>> 20:34:33.664 From In Control 1 Breath Control (coarse) 32
>>> 20:34:33.845 From In Note On 1 A2 32
>>> 20:34:33.846 From In Note Off 1 G2 0
>>> Capturing the same with Chuck only shows the 1st Note ON (and all the CCs, which are correct), but the rest of the Note ONs/OFFs vanish (BTW, playing very slowly makes no difference). To make sure it was not some bug in my code, I captured the Midi using just Chuck's example in miniAudicle->File->Open Example->MIDI->gomidi (the numeric output is converted below, just for readability):
>>> Note On E2 22
>>> CC BC (msb) 20
>>> CC BC (msb) 25
>>> CC BC (msb) 27
>>> CC BC (msb) 29
>>> CC BC (msb) 30
>>> CC BC (msb) 32
>>> Only by fully ending each note before playing the succeeding one, all the Note ONs/OFFs show up. But that's not useable...
>>> Any help on incantations for Chuck, workarounds, or a fix would be great! (particularly since after learning to ChucK from Rob Poor's Oxygen8, the rest of my ChucK code seems to be working nicely :-)
>>> chuck-users mailing list
>>> chuck-users at lists.cs.princeton.edu
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