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MIDI out offset

 
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mbncp
Junior Jammer
Junior Jammer


Joined: 10 Jun 2006
Posts: 16

PostPosted: Wed Jan 17, 2007 8:52 am    Post subject: MIDI out offset Reply with quote

Is it possible to have Jamstix send the MIDI out earlier, by a few msec (ideally early by 1 audio buffer)?

Thanks
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Ralph [RZ]
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Site Admin


Joined: 02 Jan 2008
Posts: 13332

PostPosted: Wed Jan 17, 2007 10:01 am    Post subject: Reply with quote

You can add an offset to the timing mechanism of Jamstix by adding this line to the [General] section of the jamstix.ini:

TempoOffset=0.25

The offset is in PPQ (parts per quarter) where 1 equals 1 quarter note so the above example would make Jamstix early by a 16th note.
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Ralph Zeuner
Rayzoon Technologies LLC
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Last edited by Ralph [RZ] on Wed Jan 17, 2007 11:42 am; edited 1 time in total
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mbncp
Junior Jammer
Junior Jammer


Joined: 10 Jun 2006
Posts: 16

PostPosted: Wed Jan 17, 2007 11:27 am    Post subject: Reply with quote

Thanks it works Very Happy

This fixes a problem with Cubase, as there is no warranty that the MIDI from a VST will make it in the same buffer call, so it is often delayed to the next buffer, with a timestamp of 0, leading to a funny buffer quantization.

But MIDI inserts (VST-MA, MFX) receive the correct midi timing, so I just forward the events by the same amount, so the destination plug (k2 in my case) will receive the midi with proper timestamps, no jitter, no delay.

I know that it would be easier to host K2 in Jamstix, but I like to have everything in a single instance.
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Ralph [RZ]
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PostPosted: Wed Jan 17, 2007 11:43 am    Post subject: Reply with quote

You're right about the sign, sorry about that Embarassed

I edited my post and yours so others don't get confused.
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