Re: HostCallback_GetBeatAndTempo malfunction in Logic?
Re: HostCallback_GetBeatAndTempo malfunction in Logic?
- Subject: Re: HostCallback_GetBeatAndTempo malfunction in Logic?
- From: Nikolaus Gerteis <email@hidden>
- Date: Wed, 17 Nov 2010 09:48:30 +0100
Logic differentiates between plug-ins that are currently played 'live' by the user (e.g. the software instrument currently in focus in the arrange) and plug-ins that are not. To achieve low latency for live instruments, it uses different process buffer sizes for both kinds of plug-ins. Consequently the sync information differs for live and non-live plug-in instances.
Best, Nikolaus Gerteis Software Applications Engineer Music ProApps
On 16.11.2010, at 22:26, MeldaProduction wrote: Hi,
in a plugin I need to find current position (in VST called ppqpos) - basically position in quarter notes from the beginning of the song. I'm using HostCallback_GetBeatAndTempo for that. In all hosts it works fine, except Logic.
I checked the outputs on a dual-core machine - I use 3 plugin instances, each on separate audio track. Logic processes 2 of them in one thread and 1 in another, for obvious reasons. Now in each buffer to be rendered, both plugins in thread #1 receive the same value, but the plugin in thread #2 receives a DIFFERENT one!! That's not acceptable, obviously, I need this value to synchronize multiple plugins and it needs to be accurate. What is the problem?
Cheers!
Vojtech
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