michael strohmann wrote:
HI,
what’s your strategies to reduce midi latency ?
in an installation setting i’m triggering samples from an e-drum (roland pad,
millenium midi module) and the latency a get with the settigs below is 114 ms
between trigger and sound.
delay(msec): 50 ms
Block Size: 256
if i go any lower i get “resyncing audio” filling up the pd-window and
occasional glitches up to a frozen pd…
occasionaly after a restart the latency is even closer to 250ms.
i am running this on a fairly decent gamer pc under windows 10 with the esi
Gigaport HD+ audio interface
Hi, usually midi interfaces have little to no latencies, or at least
they are most likely not your bottleneck. you have to use an ASIO driver
to get real low latencies on windows systems, or ALSA on Linux. It won't
work with the standard audio driver (MMIO).
For the Gigaport, i think there is an extra ASIO driver for download,
but "usually" you will be better off with the ASIO4ALL driver (that
would even work for your internal audiocard) - at least that's my
experience with this soundcard on a windows machine.
Having said that, i'm not sure that the "Gigaport HD+" really supports
low latencies at all. I used it once in an installation and remember
that i had to use a higher amount of PD's audio delay (= soundcard
buffer = overall latency) than with other soundcards, maybe a trade-off
for the 8 channels.
Do you need all of them ? (I guess so ...)
Anyway, try the internal soundcard first and see how low you can get
without hickups or clicks. to really test latencies i always use a test
setup like this:
[0.5, 0 1000(
|
[line~] [noise~]
| |
[*~ ]
| \
[dac~]
where the midi trigger fires the message box. use your phone recorder to
measure the "real life" latency between drum pad hit and noise woosh.
just for the record: i'm using a similar setup on an old acer netbook
with UBUNTU and an old MAYA44USB card and getting very low latencies
(less than 10ms) using ALSA drivers (PD blocksize 64, PD delay: 8)
i'm pretty sure that it's not your hardware that's lacking, but that you
have to use a dedicated audio driver (ASIO or ALSA)
best
Oliver
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