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Decklink Audio – Problem…
I simply cannot get to the bottom of the following problem and I wondered if anyone else was having the same.
I am recording high quality broadcast wav files on an Edirol R-4 at 24-bit 96Khz – playing them back on the Edirol they sound perfect. I then transfer them to my Mac (G5 2×2.5Ghz) via USB so the audio files are exact copies of the files I have been listening to on the Edirol. The stereo audio out from the Mac is via the Decklink Extreme into ch1+2 of my Yamaha 01x digital deck. However whenever I listen to them playing from the timeline of FCP they sound like sh*t; almost as if the speech is semi-composed of modulated white noise as part of the speech (nearest I can explain). If I play a speech MP3 from the web this way, it sounds like the people speaking are lisping or have a speech impediment.
I know the 01x is fine as I use it for other recording purposes (i use it without the Mac) and the quality is perfect. I have reasonably high quality cables connecting the Decklink and 01x.
There does not seem to be much I can change to configure the decklink card. Any ideas?
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Cheers,
Chrome
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3 Replies
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Just a wild guess but it sounds like a sample rate mismatch somewhere or perhaps a bit depth mismatch? is your 01 x expecting 24 bits?
just a guess..
jason
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The output from the decklink and input to the 01X is analog so I think the bit resolution is irelevant. However you might have a point with the sample rate mismatch, perhaps I should copy the original files and convert them to 48Khz before editing in FCP. Hmmm…
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Cheers,
Chrome
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ah.. you are playing back 96 k files from a 48k sequence… I get it. I don’t find the “on the fly” conversion to be too solid except for a quick preview… perhaps that is your problem. Got a feeling that doing the conversion will help.
good luck.
Jason
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