[PD] MIDI In-to-Out Latency
pedro.lopes at ist.utl.pt
Sun Jun 6 04:06:22 CEST 2010
Its possible to track when the message is generated, the issue is with
cubase not being an open system is not possible (in my mind) to check its
arrival with precision.
>I haven't tried it yet, but it's irrelevant to me. I don't want to play a
simple sine wave. I'll try it just >because I'm curious, but even if it's
perfect, that won't help me.
It can give you some hint/clue about the problem.
>This may be a Windows 7 64-bit problem. Or it could be because I'm using Pd
Extended. Or it could >be something else.
That's exactly why I suggested to test the simple patch above, if it is any
of those issues you suspect, it should come up just when using pd and midi.
On Sun, Jun 6, 2010 at 12:59 AM, Jim Aikin <midiguru23 at sbcglobal.net> wrote:
> Just to see if I got that right, the rip is:
>> keyboard -> YOKE in -> YOKE OUT -> PD IN -> PD OUT -> YOKE IN ->
>> YOKE OUT
>> -> CUBASE IN
> No. The pathway is: keyboard ->M-Audio Firewire 410 MIDI in (via the FW
> 410's driver) -> PD in -> Pd out -> Yoke in -> Yoke out -> Cubase in. The
> Yoke is only in the path once.
> The sluggish response is clearly due to Pd. Also, it's consistent whether
>> Pd's patch window is in or>out of edit mode.
>> How can you be sure? You are making two trips using that patching software
>> (I confess I had no clue what MIDI-OX was previous to your thread),
>> latency in all of the above hops (MIDI message passing through softwares)
> I'm sure because when I use the identical pathway but substitute MIDI-Ox
> for Pd, the latency goes away.
>> Do you tried to see how is Pd's latency in a "simple play sine wave with
>> MIDI note" patch? that will give you the response time of keyboard -> PD.
> I haven't tried it yet, but it's irrelevant to me. I don't want to play a
> simple sine wave. I'll try it just because I'm curious, but even if it's
> perfect, that won't help me.
> Then test the oposite, sending PD to your soundcard MIDI and playing some
>> device or other solution, allowing you to test the output (by generating a
>> MIDI message within PD and route it out od PD).
> Generating a MIDI message within Pd would tell me nothing, because I would
> have no way of knowing exactly when it was being generated.
> p.s. just for comparison I use MIDI in PD in WinXP without any noticeable
>> latency, although only in Linux I do fancy patching in-out and have no
>> noticeable latency (using everything in realtime).
> This may be a Windows 7 64-bit problem. Or it could be because I'm using Pd
> Extended. Or it could be something else.
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