Clicks'n'Pops appearing on DAT>>MOTU2408/Mac Transfer

James Lehmann · 11th December 2003, 10:48 AM

I'm experiencing some random clicks'n'pops when transferring a 44.1k stereo DAT recording to a G4 Mac via a MOTU 2408 MkIII and into Logic 6.3 on OS-9.2.2

I'm using a proper SP/DIF cable, and I'm setting the clock options of the PCI-424 to 2408 SP/DIF, and the transfer rate is always at 44.1k.

The clicks and pops are definitely not on the original recording but turn up in different spots in the new audio file each time I try a transfer, sort of every few seconds. I've been using the MOTU for months and never noticed a problem on recording or playback until now.

Could someone give me a chronological troubleshooting checklist before I start to dismantle the whole system!

Thanks a lot,

James Lehmann

David R. · 11th December 2003, 06:40 PM

Somewhere a clock is not agreeing with another clock. That is what it sounds like to me. Make sure to set the clock in Logic, the Apple sound manager, PCI interface, and 2408.

If none of this is the problem, start trashing preferences of the related possible offenders.

Good luck.

James Lehmann · 13th December 2003, 12:58 PM

Problem solved I think! Cheers David.

Having triple checked all the clock settings as you suggested I discover that Logic does not automatically reset its clock to the MOTU control panel. I had reset the latter a dozen times, but it wasn't until I opened "Audio Hardware and drivers" in Logic and manually switched to 2408 SP/DIF that the transfer seems golden now.

Seems like Logic should be a bit more alert to these things, as well as the user!

Thanks for suggestions.

David R. · 16th December 2003, 07:52 PM

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11th December 2003, 10:48 AM	#1
James Lehmann Lives for gear Join Date: Jul 2003 Location: Europe Posts: 1,189	Clicks'n'Pops appearing on DAT>>MOTU2408/Mac Transfer I'm experiencing some random clicks'n'pops when transferring a 44.1k stereo DAT recording to a G4 Mac via a MOTU 2408 MkIII and into Logic 6.3 on OS-9.2.2 I'm using a proper SP/DIF cable, and I'm setting the clock options of the PCI-424 to 2408 SP/DIF, and the transfer rate is always at 44.1k. The clicks and pops are definitely not on the original recording but turn up in different spots in the new audio file each time I try a transfer, sort of every few seconds. I've been using the MOTU for months and never noticed a problem on recording or playback until now. Could someone give me a chronological troubleshooting checklist before I start to dismantle the whole system! Thanks a lot, James Lehmann __________________ James Lehmann Voice-Over Artist - Project Studio Jockey www.jameslehmann.net Stop the superlatives madness! Abolish gear threads with the word 'best' in the title.

11th December 2003, 06:40 PM	#2
David R. Lives for gear Join Date: Jun 2002 Location: The Left Coast, and don't call it 'Frisco Posts: 1,594	Somewhere a clock is not agreeing with another clock. That is what it sounds like to me. Make sure to set the clock in Logic, the Apple sound manager, PCI interface, and 2408. If none of this is the problem, start trashing preferences of the related possible offenders. Good luck. __________________ -David R. "An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way." - C. Bukowski

13th December 2003, 12:58 PM	#3
James Lehmann Lives for gear Join Date: Jul 2003 Location: Europe Posts: 1,189	Problem solved I think! Cheers David. Having triple checked all the clock settings as you suggested I discover that Logic does not automatically reset its clock to the MOTU control panel. I had reset the latter a dozen times, but it wasn't until I opened "Audio Hardware and drivers" in Logic and manually switched to 2408 SP/DIF that the transfer seems golden now. Seems like Logic should be a bit more alert to these things, as well as the user! Thanks for suggestions. __________________ James Lehmann Voice-Over Artist - Project Studio Jockey www.jameslehmann.net Stop the superlatives madness! Abolish gear threads with the word 'best' in the title.

16th December 2003, 07:52 PM	#4
David R. Lives for gear Join Date: Jun 2002 Location: The Left Coast, and don't call it 'Frisco Posts: 1,594	__________________ -David R. "An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way." - C. Bukowski

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