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Author Topic: jb3 bitrate  (Read 12526 times)

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Offline John R

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Re:jb3 bitrate
« Reply #30 on: March 05, 2004, 11:01:02 AM »
bean, can you listen to it directly through your headphone jack?

go to the file in windows>properties>summary.  that will show you the sample freq. that got written to your drive.

jr
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Offline F.O.Bean

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Re:jb3 bitrate
« Reply #31 on: March 05, 2004, 11:07:32 AM »
bean, can you listen to it directly through your headphone jack?

go to the file in windows>properties>summary.  that will show you the sample freq. that got written to your drive.

jr

i already erased it off the jb3 :P

but on my comp speakers thru wavelab, once i switched the sampling frequency for the whole file, it played flawlessly, and a 23 minute file on the jb3, was only 11 minutes of real-time wav :)
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BobW

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Re:jb3 bitrate
« Reply #32 on: March 06, 2004, 08:52:51 AM »
right on... so word length=bit rate?


+T for covering my brain fart

Rightch....or better, bit-depth =  "bit-rate" , because it really isn't speed.
Sample rate is speed. Plat a 44.1kHz recording at 96kHz, locked, and check it out. Alvin and the Chipmunks ride again.

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Offline dklein

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Re:jb3 bitrate
« Reply #33 on: March 07, 2004, 09:59:10 AM »
HOLY SHIT, IT DOES 16/96!!!!!!!!!!

I tested this out a whle ago - it does record at 96k and converting the header for play back is easy... but it also drops samples like crazy at that rate.  So it really doens't work...

I also got excited about it the first time, but then the testing kicked in  :(
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Offline F.O.Bean

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Re:jb3 bitrate
« Reply #34 on: March 07, 2004, 10:05:04 AM »
HOLY SHIT, IT DOES 16/96!!!!!!!!!!

I tested this out a whle ago - it does record at 96k and converting the header for play back is easy... but it also drops samples like crazy at that rate.  So it really doens't work...

I also got excited about it the first time, but then the testing kicked in  :(

thats cool, i ahvent done any testing, and also, it EATS time up, as im sure you know, i think 10 minutes went by and the jb3 read 24 mins
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

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http://www.archive.org/bookmarks/Bean420
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Offline dklein

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Re:jb3 bitrate
« Reply #35 on: March 07, 2004, 10:22:28 AM »
The timing must be driven by the number of bits written - so it should probably move at double speed for a 96k recording
KM 184 > V2 > R4
older recording gear: UA-5  / emagic A62 / laptop / JB3 / CSB / AD20 / Sharp MT-90 / Sony MDS-JE510
Playback: Pioneer DV-578 > Lucid DA 9624 >many funny little british boxes > Linn Isobarik PMS

Offline F.O.Bean

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Re:jb3 bitrate
« Reply #36 on: March 07, 2004, 10:34:34 AM »
The timing must be driven by the number of bits written - so it should probably move at double speed for a 96k recording

yep, that soundz about right, for now, looks like ill stick w/ 48/44.1k ;)
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
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Offline sickrick43

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Re:jb3 bitrate
« Reply #37 on: March 12, 2004, 09:03:37 AM »

FYI -

Sample rate (44.1/48/96/etc) is how many sample (snapshots) per second are taken of the incoming signal.  48Khz = 48,000 times per second.

Bit DEPTH is word size, or how many segments that single sample is divided into for digitizing.

Keep in mind, not only do you have to create a number for FREQUENCY, but for AMPLITUDE also.  

Increasing sample rate & depth will give you more accuracy and detail -which may appear to be interchangable terms.

There used to be a really good article on Creatives website that described this - can't find the sucker anymore...

Rick
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Offline mgleason007

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Re:jb3 bitrate
« Reply #38 on: March 12, 2004, 09:09:35 PM »
The timing must be driven by the number of bits written - so it should probably move at double speed for a 96k recording

yep, that soundz about right, for now, looks like ill stick w/ 48/44.1k ;)

Are there still drop-outs at 88.2?  That stinks that the JB3 can't keep up with 96... maybe in the next model :hmmm:
Mike

Offline sickrick43

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Re:jb3 bitrate
« Reply #39 on: March 12, 2004, 11:31:32 PM »
It would appear that the recording ability of the JB3, is not a real priority for Creative, as all the newer models (Zen, etc.) are geared more towards smaller packages and playback only.

The JB3 is almost at the end of it's lifecycle (as far as computer products go, about 2 yrs.), and for the miniscule market segment that tapers occupy (and let's face it, we ARE but a very small market segment) I don't see them spending a whole lot of time developing a new, high quality field recorder, for the 1,000 or so units they may sell because of that capability - much less the R&D required to move it up to a higher resolution bit-rate, or make it stealthier.

Remember, the recording industry (RIAA, etc) is our ENEMY, whether the BANDS are our friends or not.  To them we're BOOTLEGGERS, no better than common thieves.  Any device that's going to enhance our ability to STEAL thier profits, is sure to attract negative attention from that portion of the industry.  How much heat do you think Creative is going to be willing to take, for a few measly tapers.

Evidenced by the fact that they haven't done a whole lot to enhance the abilities of the current model, and with major players in pro and consumer audio appearing to be getting into the HD recording game, I don't know that we're going to see any new devices from Creative to compete in that arena.

For most people, the JB3 is just a toy.  Those like US that would harness it's capabilities to make taping that much easier, should count our blessings.  I'm sure the recording capabilities of the JB3 were an afterthought for Creative, and not the reason for it's design in the least.

Rick
4 Track & CD Live Rig: TLM-170's->V3->SD-744T  CDLive->TC Finalzer Express->Tascam CDR-900SL

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Canon 1Ds MarkII - 16-35/2.8L - 24-70/2.8L - 70-200/2.8L IS - 180/f:3.5 Macro - 550EX Flash


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Offline F.O.Bean

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Re:jb3 bitrate
« Reply #40 on: March 12, 2004, 11:35:20 PM »
The timing must be driven by the number of bits written - so it should probably move at double speed for a 96k recording

yep, that soundz about right, for now, looks like ill stick w/ 48/44.1k ;)

Are there still drop-outs at 88.2?  That stinks that the JB3 can't keep up with 96... maybe in the next model :hmmm:

in all actuality, it really doesnt stink

1.it eats up WAY more disk space,
2. you have to redo the wave and encode it back to 88.2, 96k whatever
3.its not adding as much detail as say a 24 bit file
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
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Offline mgleason007

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Re:jb3 bitrate
« Reply #41 on: March 13, 2004, 12:52:10 AM »

in all actuality, it really doesnt stink

1.it eats up WAY more disk space,
2. you have to redo the wave and encode it back to 88.2, 96k whatever
3.its not adding as much detail as say a 24 bit file

Is disc space really that much of an issue?  I mean, even if it's taking up twice as much space?  Have you ever gotten your jb3 half full from recording?

I do most definitely agree with the last issue.  24 bit would kick ass.  Good by lappy :)
Mike

Offline F.O.Bean

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Re:jb3 bitrate
« Reply #42 on: March 13, 2004, 01:49:45 AM »

in all actuality, it really doesnt stink

1.it eats up WAY more disk space,
2. you have to redo the wave and encode it back to 88.2, 96k whatever
3.its not adding as much detail as say a 24 bit file

Is disc space really that much of an issue?  I mean, even if it's taking up twice as much space?  Have you ever gotten your jb3 half full from recording?

I do most definitely agree with the last issue.  24 bit would kick ass.  Good by lappy :)

what im saying is, id rather 24 bit files take up more space rather than sampling frequency, i mean, there are dropouyts and obvious issues at doing it at 96k!!!

i got all happy when i found out it would do 96k, but in all actuallity, i was told it was dropping bits left and right if i actually checked it out, which i have no idea how to

the wav sounded perfect on playback tho, FWIW
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline Sugarite

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Re:jb3 bitrate
« Reply #43 on: March 13, 2004, 03:00:17 AM »
I also tried recording at 16/96, and at first a 20-second clip I tried worked perfectly, which freaked me right out.  Then I tried longer periods, and the drop-outs came.  Same with 88.2.

And I'd much rather have 16/88.2 than 24/44.1.  24-bit is better for offering more dynamic range, but audience noise usually hovers around -45dB anyway.  88.2kHz would really offer twice the detail of 44.1kHz, and also be well-suited for downsampling to 44.1.

Offline F.O.Bean

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Re:jb3 bitrate
« Reply #44 on: March 13, 2004, 03:03:43 AM »
personally, id take a 24/48 file over anything, the best of both worlds
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

 

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