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skulpter Offline
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PostPosted: Thu Jan 14, 2010 9:46 pm    Post subject: Mysterious Clicks & Pops Reply with quote

I don't think this is it, but someone please confirm for me -- latency-related clicks don't get recorded, do they?

The other night at practice, I fired up Logic and did a two-mic-plus-one-on-the-kick live recording just to capture some new material we've been working on. This was one of the first multitrack recordings I've done with the new MOTU 8-pre + the good ol' Tascam FW-1884. For logistical reasons, I'm using the 8-pre as the master, and slaving the Tascam to it via ADAT lightpipe. Also, for logistical reasons, the two room mics were going into the 8-pre, and the kick mic into the Tascam.

Well, the first few tunes recorded as expected, but as the session wore on, pops and clicks began to appear on the recording, seeming to increase as the session progressed. They sound very much like latency pops, but they're recorded onto the tracks, and I think, are on all tracks in unison.

Is there a reason why this is happening that's related to the length of the recording? We recorded maybe an hour and a half total, stopping several times between songs. Anyone have a similar experience?

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PostPosted: Thu Jan 14, 2010 9:49 pm    Post subject: Re: Mysterious Clicks & Pops Reply with quote

skulpter wrote:
I don't think this is it, but someone please confirm for me -- latency-related clicks don't get recorded, do they?

The other night at practice, I fired up Logic and did a two-mic-plus-one-on-the-kick live recording just to capture some new material we've been working on. This was one of the first multitrack recordings I've done with the new MOTU 8-pre + the good ol' Tascam FW-1884. For logistical reasons, I'm using the 8-pre as the master, and slaving the Tascam to it via ADAT lightpipe. Also, for logistical reasons, the two room mics were going into the 8-pre, and the kick mic into the Tascam.

Well, the first few tunes recorded as expected, but as the session wore on, pops and clicks began to appear on the recording, seeming to increase as the session progressed. They sound very much like latency pops, but they're recorded onto the tracks, and I think, are on all tracks in unison.

Is there a reason why this is happening that's related to the length of the recording? We recorded maybe an hour and a half total, stopping several times between songs. Anyone have a similar experience?


Stab in the dark... maybe the two devices clocks weren't synced together? Does one have to be the primary clock and the other the secondary?

I know I had major pains when I first started thinking I could record on one sound card and use a secondary for monitoring.

Daniel

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skulpter Offline
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PostPosted: Thu Jan 14, 2010 10:01 pm    Post subject: Reply with quote

That would make sense, but the 1884 is operating under the 8pre's clock, per it's control panel. Anyway, I think the problem would be far worseif the two weren't synced. I do wonder if this is just a reflection of the innate shortcomings of syncing via the ADAT cable versus dedicated word clock connections -- the 8pre doesn't have em.
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PostPosted: Thu Jan 14, 2010 10:09 pm    Post subject: Reply with quote

One more silly thought, both are set to the same bit / sample rate?

Daniel

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tmix Offline
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PostPosted: Fri Jan 15, 2010 5:02 am    Post subject: Reply with quote

Typically pops and clicks like you describe are clocking issues which can be crossed settings for sample rate or master/ slave set up, but a third thing comes to mind in that some adat cables are finicky and if the end is dirty or not well seated it will cause the same issue....clocking problems.
if you can, switch cables, clean the ens or both.
Make sure the are well seated and try again.

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skulpter Offline
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PostPosted: Fri Jan 15, 2010 5:37 am    Post subject: Reply with quote

Thanks Daniel & Tom for those suggestions. I'll check to make sure they're both set to the same sample rate. The cable is brand new, but there are two optical ins on the 8pre, so I'll try the second one to see if that helps.

I'll report back with the results after Sunday practice. Thanks again.

K

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Lt. Bob Offline
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PostPosted: Fri Jan 15, 2010 8:45 am    Post subject: Reply with quote

whales?
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tmix Offline
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PostPosted: Fri Jan 15, 2010 10:24 am    Post subject: Reply with quote

Only if he is using....Sonar..(LOL)
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skulpter Offline
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PostPosted: Fri Jan 15, 2010 10:42 am    Post subject: Reply with quote

tmix wrote:
Only if he is using....Sonar..(LOL)


Laugh Laugh Laugh Laugh Laugh

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PostPosted: Fri Jan 15, 2010 12:58 pm    Post subject: Reply with quote

tmix wrote:
Only if he is using....Sonar..(LOL)

Mr. Green Mr. Green Mr. Green

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