Synth drift

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JoPo
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Re: Synth drift

Post by JoPo » Sun Feb 21, 2016 7:16 am

Bud Weiser wrote:Jitter is what you feel more than you´ll hear it and it´s comparable to random non-periodic changing delaytime.
These random changes can be small, large, both and anything in between at any point on time axis.
Unforeseeable without testing.
There is no 15-20 ms, it can be any values depending on the system´s issues.
It´s pretty much recognizable far under 15ms.
Yes ! You're right ! 15-20ms is the smallest delay between 2 short sounds human ears can detect. But much less time jitter is hearable in modern music. And sometimes, when I move back or forward some snare shot, for instance, by just 3 or 5 ms, the effect is really noticeable.
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Bud Weiser
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Re: Synth drift

Post by Bud Weiser » Sun Feb 21, 2016 9:26 am

JoPo wrote: Yes ! You're right ! 15-20ms is the smallest delay between 2 short sounds human ears can detect. But much less time jitter is hearable in modern music. And sometimes, when I move back or forward some snare shot, for instance, by just 3 or 5 ms, the effect is really noticeable.
Thx !
I´ve found the since a long time unavailable 64Bit version of EVC MIDI-Test application in my archive.
Cannot test because I´m still on 32Bit systems, but hope it works.
miditest64412.zip
(204.69 KiB) Downloaded 69 times
:)

Bud

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JoPo
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Re: Synth drift

Post by JoPo » Sun Feb 21, 2016 9:43 am

I tried the miditest but impossible to get any result and one's I loaded it and clicked on 'test', impossible to kill the app in the task manager !

So, I can't indicate you any result..
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Yogimeister
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Re: Synth drift

Post by Yogimeister » Sun Feb 21, 2016 3:28 pm

Thanks for the detailed response Faxi,
(And all the rest of the info in the other posts)

My "learning curve" included coming up against all these "challenges" (tempo sync, midi drift, and oscs/envelopes "irregularities")

I have been using Silentway and audio ramps for some "sync" duties (I heard about the USAMO before it was released ... Sounds like a proper tool in the fight against midi jitter - but darn expensive ...."


(I also saw there is the scope vst device that might do something like silentway but havent tried it yet .... You can also set up something similar to the silent-way "gate" with audio or a vst (that send audio to modular)

I havent found a way to drive non-modular synths (ProTone and the likes) with audio (therefore USAMO could be great for that)

My 0.02$ - I have read and noticed that on my 32bit XP system , there is a sort of sync drift (something to do with the internal clocks in the PC) - and restarting cubase after a long time that it has been running seems to make the MIDI performance tighter)

(I always solo the midi track that I bounce - to assist midi timing - and also to avoid pops and clicks ...)


Yogi

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faxinadu
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Re: Synth drift

Post by faxinadu » Sun Feb 21, 2016 10:32 pm

cheers mate, i actually think i got your problem wrong though and the others here like fra and jopo got it right.

seems like what you wrote here is probably the best solution:
(I always solo the midi track that I bounce - to assist midi timing - and also to avoid pops and clicks ...)

Yogimeister
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Re: Synth drift

Post by Yogimeister » Sun Feb 21, 2016 11:35 pm

As far as I am concerned , you were all right - I have been dealing (and postedin the past about) all 3 types of problems ..

I think the OP was talking about jitter - but not sure (sharp bass sounds suffer from non-synced Oscs/Envelopes too) ;)

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Bud Weiser
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Re: Synth drift

Post by Bud Weiser » Mon Feb 22, 2016 1:59 pm

JoPo wrote:I tried the miditest but impossible to get any result and one's I loaded it and clicked on 'test', impossible to kill the app in the task manager !

So, I can't indicate you any result..
Sounds weird.
That 64Bit version is from 2011, dunno which Windows version is expected though ...

The 32Bit version works perfect.

I believe, you cannot kill it as long as the test runs.

Bud

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JoPo
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Re: Synth drift

Post by JoPo » Tue Feb 23, 2016 12:59 pm

Does this test take more than 3mn ? If it does, I've not been enough patient... But that would be weird, no ? 3mn to mesure some ms delay ?
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