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Author Topic: MT SPDIF Question  (Read 9944 times)

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Offline Do.com

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MT SPDIF Question
« on: December 10, 2005, 02:36:16 PM »
So I have update to the 1.20 firmware and have some confusion as to the Recording Time Available setting.  I record SPDIF in and have it set to 16 bit.  I realize this is probably 16/48 as the sample rate is unchangeable.  It says I have Max Recording Time of 01:30:38.  If I am running 16 bit shouldn't my 2Gig card have more time than that?  Im confused and worried that I may have to run the JB3 for my next show as 1:30:38 is definitely not enough time.  Help?!?

Thanks
C
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Offline Nick Graham

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Re: MT SPDIF Question
« Reply #1 on: December 10, 2005, 02:46:27 PM »
You can run it at sample rates from 44.1 to 96kHz...my guess is you're set at 16/96, so that's why it's only showing 90 minutes of record time.
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Offline Do.com

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Re: MT SPDIF Question
« Reply #2 on: December 10, 2005, 02:53:57 PM »
The only thing is that when u set the input the SPDIF u cannot change the sample rate.....unless someone knows some trick i dont.
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Offline anhisr

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Re: MT SPDIF Question
« Reply #3 on: December 10, 2005, 03:22:32 PM »
have you reformated the card with the MT2496?
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Offline Do.com

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Re: MT SPDIF Question
« Reply #4 on: December 10, 2005, 03:45:59 PM »
yes i have, after each time i tape i reformat it  :'(   hopefully there is a good answer to this....
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Offline sickrick43

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Re: MT SPDIF Question
« Reply #5 on: December 10, 2005, 04:01:17 PM »
I appears as if the "time left" indication when recording is not the capacity of the card, but the 2GB limit.  And the Rec Time Available, in the record settings, is the amount of time at current bitrate/depth available on the media.

I'm running a 4GB card, so at 48/24, the box tells me I have 4:02:53 available, but if I go into Record Mode, my available time is 1:55.

So, logically, the menu item is media time, and the record item is till the 2GB limit.

Which kinda sucks to have to wade thru menus to see how much time is left on your media...

Rick
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Offline anhisr

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Re: MT SPDIF Question
« Reply #6 on: December 10, 2005, 04:08:03 PM »
I just formatted a 2gb card and on 16bit spidf in it says 1:29:09.  I am going to run it and see what happens. 
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Offline Do.com

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Re: MT SPDIF Question
« Reply #7 on: December 10, 2005, 04:12:47 PM »
Thanks - I mean is the fix being able to switch the sampling rate on SPDIF to actually use it properly?  If so, hopefully that is on an update coming soon.  I dont want to lug the JB3 all next week!
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Offline Do.com

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Re: MT SPDIF Question
« Reply #8 on: December 10, 2005, 08:24:41 PM »
Anyone else find a way to bypass this or get more time out of it?
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Offline anhisr

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Re: MT SPDIF Question
« Reply #9 on: December 11, 2005, 12:42:28 AM »
When I started the recording it showed the time going down from 1:29 under time remaining but, when I hit the time it just stayed at zero and kept on going.  So, you can't trust the time remaing on a 2GB card.
 
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Offline udovdh

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Re: MT SPDIF Question
« Reply #10 on: December 11, 2005, 03:07:46 AM »
Quote from: anhisr on December 10, 2005, 04:08:03 PM
I just formatted a 2gb card and on 16bit spidf in it says 1:29:09.  I am going to run it and see what happens. 
Set the speed of your adc/pre-amp to 44.1 or 48 Khz if you need 3 hours...
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Offline Do.com

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Re: MT SPDIF Question
« Reply #11 on: December 11, 2005, 10:13:39 AM »
Are you saying it calculates the time based on the input source?  I don't think that's the case. 

So any other way to get more than 1.5 hours using SPDIF?

C
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Offline sickrick43

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Re: MT SPDIF Question
« Reply #12 on: December 12, 2005, 10:19:58 PM »
Quote from: Do.com on December 10, 2005, 04:12:47 PM
Thanks - I mean is the fix being able to switch the sampling rate on SPDIF to actually use it properly?  If so, hopefully that is on an update coming soon.  I dont want to lug the JB3 all next week!

"lug the JB3"?  Try lugging a D10 Pro & 2 EC-90 SLA's...

I'll take the JB3 over that rig any day...

After doing around 8 hours of taping this weekend, I found the statement I made above to be correct.  The time calculation is pretty accurate.

A few other observations:
1 - Had it lock up between sets while leaving it running in "pause" mode.
2 - 48/24 will not play back thru the headphone jack, so forget about checking your recording between sets.
3 - Ran it on the "Power Station" LI-ION battery for 6 hours, with 2 lites left (though the battery doesn't show lights when charging, so you have no idea whether it's fully charged or not - glad I bought TWO).
4 - Channels DO flip @ 48/24 - so I ran my mics reversed into the V3 inputs, so I wouldn't have to flip channels later on.
5 - DON'T use you PCMCIA card reader in your laptop between sets.  Lucky I live to blocks from the club I was recording in - I had to run home and format the card in my PC during the 2nd set.
6 - 48/24 is the SHIZZIZZLE.  Much more detail, especially in the high freq's.  Well worth the added steps to dither-down for CD burning.  I listened to a transfer from someone who had thier DAT patched out of the line-outs on my V3 and the difference is apparant.

Rick

Rick
« Last Edit: December 12, 2005, 10:29:41 PM by sickrick43 »
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24 Track Rig: Audix D6/D2/D4/I5/SCX1-C/O->Whilrwind SPC82 ISO Splitters->DigimaxLT's->Alesis HD24 (Lucid GenX192 Master Clock)

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Offline udovdh

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Re: MT SPDIF Question
« Reply #13 on: December 13, 2005, 02:34:11 AM »
Quote from: Do.com on December 11, 2005, 10:13:39 AM
Are you saying it calculates the time based on the input source?  I don't think that's the case. 

So any other way to get more than 1.5 hours using SPDIF?

S/PDIF can be used at various speeds and bitdepths; I hope you are aware of that.
So, apart from a possible bug in your MT, the SPDIF speed and bitdepth controls how fast your 2GB file fils up.
At 16 bit, with 44.1 or 48 Khz you should get 3 hours plus. At 24 bit 1.5 hours.
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Offline Do.com

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Re: MT SPDIF Question
« Reply #14 on: December 13, 2005, 07:52:54 PM »
Ok so I agree that I should be able to adjust the settings for SPDIF input but for some reason the only setitng I have with SPDIF input selected is the Bit Rate.  Here are my results:

Input Source: SPDIF
Sample Rate: Auto (It will not allow me to adjust this)
Bits: 16
Rec Time Available: 01:30:38

Input Source: SPDIF
Sample Rate: Auto (It will not allow me to adjust this)
Bits: 24
Rec Time Available: 01:00:27

So basically, going SPDIF in, those are my only choices!  If someone can teach me how to get around the Auto setting on the Sample Rate I'd be able to do 3+ hours and be a happy man....any other ideas?

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