[PD] midi latency test

[Larry Troxler]

Well, I was going to actually cable this up, and then I realized that it's not 
so easy with the standard soundblaster MIDI adapter I'm using, since it 
doesn't provide female sockets, but instead, male cable ends. So in my case, 
I can't just take a MIDI cable and connect the input to the output!

So jmf3 and PT147,  are you really talking about hardware MIDI, and if so, I 
take it you both have a MIDI interface card other than the soundblaster 
adaptor?  If not, the how did you do it? Yes you can pass it through the 
Input and Through ports on a synth, but I think that first you would want to 
make sure that the "thru" port is really a hardware circuit connection, and 
not implemented in software in the synth.

If you _are_ really talking about MIDI, and not software emulation of it 
within the PC, then even so, 35 to 40 ms seems a bit long (these are ms 
values, right?).

PT147, you say that it's going to be more than 10. If this is milliseconds, 
I'm not so sure why that would be normal, because a complete MIDI message 
should go through the interface in about 1 ms. So any delay much greater than 
this should be due to the operating system and it's drivers. Am I missing 
something? Unoftunately, neither PT147 nor jmf3 said what OS they are running 
on. I have the feeling that this is where the problem lies. jmf3, what do you 
mean by "very high"?

Regards

Larry Troxler



On Wednesday 05 March 2003 21:29, PT147 at mdx.ac.uk wrote:
> I got between 35 and 40 ish.   Surely it's going to be >10, anyway,
> because of the delay.
>
> ----- Original Message -----
> From: "jfm3" <jfm3 at ouroboros-complex.org>
> To: <pd-list at iem.kug.ac.at>
> Sent: Thursday, March 06, 2003 12:17 AM
> Subject: [PD] midi latency test
>
> > If you have some time, please connect your MIDI in to your MIDI out and
> > bang on the attached patch. Let me know what number you get. I would
> > expect this number to be very low; around 1. On my systems it is very
> > high, and I'm not sure why.
> >
> > --
> > (jfm3  2838 BCBA 93BA 3058 ED95  A42C 37DB 66D1 B43C 9FD0)
>
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