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FCP Edit to Tape / Digibeta / Sound issue
I have tried to Edit to Tape an HDV Sequence, down converted to SD, to a Digibeta deck.
When I monitor (headphone out of digibeta deck) while recording it sounds normal. When I rewind and check tape it sounds like the audio is “doubled up”, almost like a very short chorus effect is on the audio. as well as this I can hear what sounds like tape crackle now and again.
However – when I do a straight crash record from the timeline – the audio plays back fine, no crackle.
So thinking it was an edit to tape settings problem i clicked on the audio button in the edit to tape window and notice audio was set to ALL ON. I changed this to A1 and A2 on, thinking that my extra audio tracks (which I had disabled, these where the original audio, not the OMF exported stereo mix) were somehow going down the SDI anyway…
No luck – did the edit to tape again and still sounded the same.
My heart rate has returned to normal now as the network kindly will accept the crash record with non standard timecode – but I of course still want to find out the problem so this doesn’t happen again next week….
The Sequence was HDV 1080i, via a Decklink HD Extreme Capture Card, set to down convert to anamorphic 16:9. Sony Digibeta DVW-A500P deck.
Anyone know what the problem could be?
thanks
Hugh
Mac G5 Dual 2 GHz Power PC
2.5 GB Ram
Final Cut Pro 5.1.4
Quicktime 7.4.1 -
8 Replies
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very odd. Are you using the confidence heads to monitor the Digibeta?
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[Aaron Neitz] “Are you using the confidence heads to monitor the Digibeta? “
That’s what I was wondering. If you take that echoey, digibeta and recapture it, do you still get the echo?
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What is the sync source for your deck and your edit system? If the deck’s clock isn’t receiving the same sync as the edit system the clock will drift and give you that type of problem.
Michael Alberts
Ambidextrous Productions, Inc.
http://www.ambidextrous.net -
truth be known it’s my first experience laying off, or in fact dealing with, digibeta decks- or anything that isn’t a firewire DV/HDV set up.
I would just have been monitoring however it came out of the hire case – i’m guessing the confidence heads give a feed from the record heads rather than straight from the input or something?
i could try it again and double check – however the echoey version i laid off to i sent to the network to see if they could shed any light…
as far as sync source goes – the black magic decklink site says my card has some feature that means i don’t need a black box generator (sorry I am probably getting terms slightly wrong). now i get a bit lost here – doesn’t my RS232 cable handle the syncing of the timecode?
if it helps, my monitor shows the picture split with a large black line through it when monitoring from the deck rather than the mac – although this seems to only effect the monitoring, it goes on the tape fine, well the picture do anyway….
thanks guys
hugh
Mac G5 Dual 2 GHz Power PC
2.5 GB Ram
Final Cut Pro 5.1.4
Quicktime 7.4.1 -
Ah. Black bar = There’s a sync issue. The deck should have 1) been synced with the same BB generator as your Decklink or 2) been in “input video” sync mode when you laid off.
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some progress!
thanks aaron – are you able to tell me a little more about “input sync mode”? is that the deck using external T/C? if so i thought i was doing that…
Mac G5 Dual 2 GHz Power PC
2.5 GB Ram
Final Cut Pro 5.1.4
Quicktime 7.4.1 -
pull out the front panel and on the row of switches that are revealed you’ll see a switch labelled “out ref”, set it “input video”
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done. i love you.
the switch was indeed in the other position – so i look forward to trying this out…
thanks very much
Mac G5 Dual 2 GHz Power PC
2.5 GB Ram
Final Cut Pro 5.1.4
Quicktime 7.4.1
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