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Author Topic: Spaced omni with center card festy sample  (Read 7936 times)

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Offline Gutbucket

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Re: Spaced omni with center card festy sample
« Reply #30 on: January 06, 2020, 06:19:51 PM »
To help with the sync, why not use a line cable, and output one of the stereo channels to the unused channel of the recorder handling the mono?
That way you don't really even need to clap, since you'll have an exact clone of that one channel as a reference, on both decks!

This strategy works.  I've done it using two DR2d recorders (4ch ea) when I needed 6 channels total but could not use a single, larger multichannel recorder.  I did so by recording the headphone line-out from the first into the mic-in of the second to serve as duplicate "sync tracks".  The sync tracks certainly help with alignment and sync, but keep in mind that there is a small amount of digital latency between a recorder's analog input and analog output.  That means that when the sync tracks on the two recorders are perfectly aligned visually, the other tracks are not actually in perfect sync but offset by whatever the signal path latency is through the ADC>DAC of the first recorder + ADC of the second recorder.  Probably only a few milliseconds which is equivalent to a few feet and thus may not be significant, but is something to be aware of.

If this worries you, you can determine perfect alignment using a clap, figure the latency offset by aligning the clap peaks, and then will be able to align perfectly using that offset the next time without needing a clap.
« Last Edit: January 06, 2020, 06:35:00 PM by Gutbucket »
musical volition > vibrations > voltages > numeric values > voltages > vibrations> virtual teleportation time-machine experience
Better recording made easy - >>Improved PAS table<< | Made excellent- >>click here to download the Oddball Microphone Technique illustrated PDF booklet<< (note: This is a 1st draft, now several years old and in need of revision!  Stay tuned)

Offline morst

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Re: Spaced omni with center card festy sample
« Reply #31 on: January 06, 2020, 06:22:38 PM »
keep in mind that there is a small amount of digital latency between a recorder's analog input and analog output.  That means that when the sync tracks on the two recorders are perfectly aligned visually, the other tracks are not actually in perfect sync but offset by whatever the signal path latency is through the ADC>DAC of the first recorder + ADC of the second recorder.  Probably only a few milliseconds which is equivalent to a few feet and thus may not be significant, but is something to be aware of.

If this worries you, you can determine perfect alignment using a clap, figure the latency offset by aligning the clap peaks, and then will be able to align perfectly using that offset without needing a clap.
DANG LATENCY AGAIN!
 :cheers:

Offline Gutbucket

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Re: Spaced omni with center card festy sample
« Reply #32 on: January 06, 2020, 06:35:35 PM »
Its a latent issue!
musical volition > vibrations > voltages > numeric values > voltages > vibrations> virtual teleportation time-machine experience
Better recording made easy - >>Improved PAS table<< | Made excellent- >>click here to download the Oddball Microphone Technique illustrated PDF booklet<< (note: This is a 1st draft, now several years old and in need of revision!  Stay tuned)

Offline Gutbucket

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Re: Spaced omni with center card festy sample
« Reply #33 on: January 11, 2023, 11:44:14 AM »
Setup detail- Best to arrange things so as to place the center coincident-pair or single microphone forward of the baseline between wide-spaced omnis by about 20cm (8") if possible.  Should form a shallow triangle arrangement as viewed from above or below.

If using angled directional L/R mics in place of the omnis, spaced less widely than the omnis would be, but at least twice as wide as a typical 2-channel near-spaced configuration, it helps to push the center position a good bit farther forward still.  The forward spacing in the arrangement shown in the photos above, posted back in Jan 2020, works out well.
musical volition > vibrations > voltages > numeric values > voltages > vibrations> virtual teleportation time-machine experience
Better recording made easy - >>Improved PAS table<< | Made excellent- >>click here to download the Oddball Microphone Technique illustrated PDF booklet<< (note: This is a 1st draft, now several years old and in need of revision!  Stay tuned)

 

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