Re: [LMMS-devel] VST host synchronization

[Mike C. <rda...@gm...>]

BTW, I couldn't reproduce missing GUI problem, but because of sound
issues I guess that could be too connected with the wrong sample
rate settings of shared memory patch. So otherwise if that will not help
you, let me know   also please what Qt, Wine and Gc versions you are using.

Thanks,
-Mike C.

On Mon, Jan 28, 2013 at 9:21 AM, Mike Choi <rda...@gm...> wrote:

> Hi,
>
> Can you try again with latest patch I uploaded now?
>
> https://sourceforge.net/tracker/index.php?func=detail&aid=3601658&group_id=105168&atid=640436#
>
> Well it seems as I moved samplerate initialization into shared memory
> (this should be optional with "Sync VST plugins to host playback" option
> from general settings, see screenshot) it really did affected Zebra2,
> Zebralette, etc because those plugins seems to require samplerate to be set
> during init part, not as before. So I moved this
> samplerate initialization into plugins init part. And Zebra2 sound output
> seems to work now. So could you try this last patch also and if no change
> with Global Settings option turned on / off? (see screenshot).
>
> BTW it also seems as I moved samplerate settings into init part, almost
> all VST crashes from Master channel are gone now with this sync/ shared
> memory patch, no matter actual playback.
>
> -----
>
> As for sound cracking issue with dBlue Glitch with VST sync option on, it
> seems those sound artifacts are there even with the highest precision of
> Sync I got from sync timers, or even samplerate current position on plugin
> side (if syncing to host is done quite often, like every 1, 4ms..), but if
> sync to host is not so frequent , like every 10ms or so, and rest recounted
> on plugin side, It seems there is much less sound crackling, so I guess
> those artifacts come from rounding errors or so on lmms host sync part if
> that sync is done too often. I will try to dig it more.
>
> Best regards
> Mike C.
>
> On Sun, Jan 27, 2013 at 10:42 PM, John Serafino <lzr...@gm...>wrote:
>
>> Okay, confirmed with latest GIT version. It happens regardless of whether
>> or not the VST sync patch is applied, ruling it out IMO. Just to present as
>> much data as possible, here is a screenshot while the VST is loading, with
>> the GUI visible:
>> https://lh3.googleusercontent.com/-SVIaKC_Qe1w/UQWepIpEmxI/AAAAAAAABEA/tcRmmp0pxSE/s1600/Screenshot+from+2013-01-27+15%3A16%3A38.png And
>> this is what happens when the VST finishes loading:
>> https://lh4.googleusercontent.com/-vTMye10Df5A/UQWepC8OAjI/AAAAAAAABD8/yABTyzbq_jU/s1108/Screenshot+from+2013-01-27+15%3A18%3A06.png
>>
>>
>> On Sun, Jan 27, 2013 at 12:14 PM, Mike Choi <rda...@gm...>wrote:
>>
>>> Hi,
>>>
>>> Thanks John, I will check this tonight.
>>>
>>> BTW I just released a patch update which adds global option to turn VST
>>> sync on / off. (no localisations yet)
>>> You can get it from this link:
>>>
>>> https://sourceforge.net/tracker/index.php?func=detail&aid=3601658&group_id=105168&atid=640436#
>>>
>>> I was also trying to investigate this sound crackling issue that Chrissy
>>> mentioned, but my test computer keeps crackling all time now, I will check
>>> it better from home, but if this will be an issue, I think it would be
>>> better to leave that VST Sync patch for some later release, as it will be
>>> fixed overall, but I will look on this tonight.
>>>
>>> Best regards
>>> Mike C.
>>>
>>> On Sun, Jan 27, 2013 at 3:59 PM, John Serafino <lzr...@gm...>wrote:
>>>
>>>> Using Linux with 8 gb of DDR 3 ram and a dual core 3 ghz CPU. I'm not
>>>> sure if I have the latest patch or not, so I'll check on that when I get
>>>> home today. I usually scale my work space across two 1600x900 monitors, but
>>>> I've never had any problems as a result.
>>>>
>>>> I can check on my onboard sound card when I get home too, if you need
>>>> thus data.
>>>> On Jan 27, 2013 1:58 AM, "Mike Choi" <rda...@gm...> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I will look on this John, also are you using Linux or Windows and
>>>>> latest patch? What are your computer spec?
>>>>> As per GUI problems I am aware now just that if you re-size lmms
>>>>> workspace to something small, than if you load new plugin it will affect
>>>>> resulting window size, but will look on this too.
>>>>>
>>>>> As per VST sync. patch, (please assure at first you have latest patch
>>>>> from link below)  I personally dont have problems with it on winXp and two
>>>>> Linux machines. Chrissy do you have any problems with latest patch?
>>>>>
>>>>> http://sourceforge.net/tracker/?func=detail&aid=3601658&group_id=105168&atid=640436
>>>>>
>>>>> Also as per potential VST effects, I think this sync patch should not
>>>>> do any wrong coz it is targeted on VSTs which do sync to host normally, so
>>>>> without it  they don't work either as supposed to be. But I may add this
>>>>> Sync functionality like on/off feature into global settings today.
>>>>>
>>>>> Best regards
>>>>> - Mike C.
>>>>>
>>>>> On Sat, Jan 26, 2013 at 11:18 PM, John Serafino <lzr...@gm...>wrote:
>>>>>
>>>>>> Something borked Zebra2 compatibility around the time this was
>>>>>> introduced. Not sure if the two are connected though. Zebra2 still works,
>>>>>> but the GUI disappears to grey as soon as it finishes loading. I'm guessing
>>>>>> it's actually related to the GUI patches, but I posted it here cause...
>>>>>> well cause. ;)
>>>>>>
>>>>>>
>>>>>> On Sat, Jan 26, 2013 at 4:01 PM, Tobias Doerffel <
>>>>>> tob...@gm...> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> 2013/1/24 Mike Choi <rda...@gm...>:
>>>>>>> > I uploaded new version of the patch and cleaned the code. Should
>>>>>>> be faster,
>>>>>>> > more accurate sync.
>>>>>>>
>>>>>>> Is there any potential impact on existing code/functionality? I'm
>>>>>>> asking because I'm not sure whether to include it for the 0.4.14
>>>>>>> release. How do you estimate the stability of current VST
>>>>>>> implementation?
>>>>>>>
>>>>>>> Best regards
>>>>>>>
>>>>>>> Tobias
>>>>>>>
>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Johnny
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
>>>>>> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills
>>>>>> current
>>>>>> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
>>>>>> MVPs and experts. ON SALE this month only -- learn more at:
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>>>>>>
>>>>>
>>>
>>
>>
>> --
>> Johnny
>>
>
>