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Ralph [RZ]
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 Posted: Mon Aug 22, 2005 8:33 am Post subject: |
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| wmountney wrote: | 1. Using DirectiXer's MIDI out loopback to drive another VSTi or DXi frequently has timing problems, which seem to be worse at higher latencies, but always somewhat bad at any latency. I had never been using MIDI out, and so had never noticed this problem.
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This appears to be a DirectiXer issue. My suspicion is that it is not compensating delta frames.
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Ralph Zeuner
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Ralph [RZ]
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| Posted: Mon Aug 22, 2005 10:24 am Post subject: |
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Bill, just to make sure, which Jamstix version are you using?
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Ralph Zeuner
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Ralph [RZ]
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| Posted: Mon Aug 22, 2005 12:07 pm Post subject: |
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| wmountney wrote: | When NOT using MIDI out, just subhosting BFD in Jamstix (via DirectiXer), there seems to be an issue caused by MIDI automation at higher latencies. For instance, with latency around 50ms, if any type of automation change point falls exactly on a drum hit, it causes a double-hit, flamming effect on that hit. If you are using something like a sloping velocity envelope over a wider area it will affect all of the hits during the changing portion of the envelope. Depending on other factors, like the tempo, you may hear it as a double hit, almost synchronized with slight flange, or a more seperated flam effect. It is easiest to hear if you create a simple pattern with a single regular kick or snare hit, and turn down the ambience.
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This problem affects also the internal engine. Here's the scoop:
When using Jamstix with DirectiXer and MIDI automation envelopes, DirectiXer appears to corrupt its song positioning info leading to repeated notes and other corruptions as Jamstix gets conflicting timing info (it actually jumps forward and backward in minute quantities). We also confirmed this issue with the Steinberg Groove Agent demo so it's definitely not a Jamstix but a DirectiXer issue.
We will notify Tonewise of this problem.
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Ralph Zeuner
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wmountney
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Joined: 06 Mar 2005
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| Posted: Mon Aug 22, 2005 9:26 pm Post subject: |
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| Zauni wrote: | | Bill, just to make sure, which Jamstix version are you using? |
Ralph,
I'm using the latest X5-3 beta.
Bill |
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wmountney
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Joined: 06 Mar 2005
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| Posted: Mon Aug 22, 2005 9:42 pm Post subject: |
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| Zauni wrote: |
We also confirmed this issue with the Steinberg Groove Agent demo so it's definitely not a Jamstix but a DirectiXer issue.
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Ralph,
I figured it was probably a DirectiXer problem. I've been spending some time looking into other ways of running it in the mean time. One thing I've tried that appears to work pretty well is this:
- Use Jamstix with the full 17 outputs in Cakewalk's VST Adapter
- Insert BFD Ultra into Jamstix
- Configure BFD Ultra's output configuration so that the mono channels only use every other output (completely ignoring what the names of the outputs are in BFD - just pretend they're a set of numbered outputs)
- In SONAR, set the track interleave for each of the mono channels to mono, so the incoming channels will be correctly centered and panable
With this configuration, you lose half of the mono outputs in Ultra, but you still wind up with more usable outputs than BFD All, including the three general purpose stereo busses, which is nice, although you could also choose to use those as three individual outs. Also, Cakewalk's VST Adapter seems to have more solid MIDI timing than DirectiXer even for the direct hosted method, although that might be my imagination.
One side affect: If you use a stereo track insert effect on one of the channels, and that effect is also capable of working in mono, the track interleave will force it to mono. Normally you could just switch the interleave to stereo, but with this setup that will result in the channel being panned hard left or right, depending on which output you're using in BFD. An example would be dropping a reverb effect into the Snare track's FX bin. Some reverbs, like Sonitus, will still force stereo ouput, but others will automatically switch to mono. One solution for that is to just use an Aux Send instead. (Technically, the Aux Send would be the "right" way to do it anyway, but not if you want to freeze the effect along with the track.) The other solution is to use one of the three stereo busses for whatever kit piece needs a stereo FX, allowing you to leave the interleave at stereo and still have proper panning.
Bill |
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