Topic: Running Schoeps CMD-2U(Digital Microphone Bodies)w/Sound Devices 788T

[blee421]

Here is a link to the card I got.

http://www.adorama.com/IDSCFE332G30.html

[F.O.Bean]

Here is a link to the card I got.

http://www.adorama.com/IDSCFE332G30.html

It doesn't list the speed of the card in that link tho. Do you know what the speed of the card is on the packaging it came in or something? I am just curious, that's all I know it lists the speed at 30 MB/s, which seems AWFULLY AND EXTREMELY FAST, but I meant the speed w/ regards to 133x, 150x, 233x/etc. Like my 32GB RiData Lightning Series CF Card is rated at 233x. I was wondering what that Sandisc card was rated at, not the actual speed in MB/s

Like my 32GB RiData Lightning Series card is rated at 233x speeds. Which equals 35 MB/s READ SPEEDS, and SHOULD reach the same at write speeds, but it doesn't. It only writes at 16 MB/s WRITE SPEEDS SUPPOSEDLY And that's THEORETICALLY!!!! In REALITY, my 722 shows it only doing like 5 MB/s in REALITY during the 722's drive speed tests. Theoretically, your 30 MB/s is SUPER FAST (and UNHEARD OF), and should definitely be able to handle 8 channels at 24/96, but in REALITY, that card will NEVER reach its 30 MB/s supposed read/write speeds.

As soon as you get that CF Card, put it into your 788T and do the drive speed tests. I would LOVE TO KNOW what the write speed actually is in REALITY, because I HIGHLY DOUBT that it EVER COMES EVEN CLOSE to reaching its 30 MB/s advertised write speeds

So yeah Brian, please report back to this thread and let us all know what speeds the 788T shows after its drive speed tests And also do some tests and let us know if it can handle 8 channels at 24/96

Best of luck my man!

[notlance]

This question of CF speed and 7xx boxes seems to keep coming up.  As I said above, I have never had a problem with CF speed on either a 702 or a 788T.  That said, I have not tried every available CF card.  But here is the data on the cards I do have, listed in order from slowest to fastest:

Card                             size    "speed"         788T speed test results

Kingston Elite Pro           32GB    133x              4.8 MB/sec
AData Speedy                16GB    unknown         6.4 MB/sec
AData Speedy                 4GB     unknown         7.2 MB/sec
SanDisk Ultra II              2GB      unknown        7.8 MB/sec
SanDisk Extreme III        16GB     unknown       14.0 MB/sec

Recording 24 bits at 96000 samples/sec is (from the SD 788T v1.65 manual, page 101):
(24 x 96000) / (1048576 x 8bits) = 0.275 MB/sec/track (rounded)

Recording 8 tracks of 24/96k results in a data rate of 0.275 MB/sec/track x 8 tracks = 2.2 MB/sec

As you can see, the slowest card listed above (4.8 MB/sec) should be fast enough.  As a test, I used the "slow" Kingston Elite Pro 32GB card to record about 3.5 hours of 8 track 24/96 without any CF failures or warnings.  After inspecting and listening to the sound file, I could not find any errors.  The card was newly formated and so not fragmented.  If the card had been highly fragmented, maybe my results would have been different.

Now I do not own nor did I test a SanDisk Extreme III 32GB card, but I suspect it is not much slower than the 14MB/sec 16GB card I did test.  In other words, the SanDisk Extreme III 32GB card should work fine for 8 tracks of 24/96k, IMHO.

[Brian Skalinder]

You guys may get more eyes / interest if you start a Recording Media thread specific to card speed, rather than burying the content in a thread about pairing digital mics with the 788.  Just a thought.

[blee421]

New thread about CF speed tests and the 788T is here:

http://taperssection.com/index.php/topic,122193.0.html

[F.O.Bean]

New thread about CF speed tests and the 788T is here:

http://taperssection.com/index.php/topic,122193.0.html

Nice work Brian BTW, when do your digital Schoeps bodies arrive I cant wait to hear them with the 788T

[blee421]

Here's an update on the CMD-2Uxt's.I got them and plugged it all in.NO LOVE.So I got on the horn with Sound Devices(Nic).He has identical Schoeps bodies and he said that his were working fine at 24/48,but when he tried to switch to 24/96 he lost signal all together.So I packed up the 788,the four bodies,and the breakout cable and sent it all out on Monday.Nic assured me that it was probably a bug in the firmware.So I got a loaner from them for Deer Creek Phish and will run 4011's>788T.So,I am trying to stay patient.Hopefully all will be well at the end of the month and I can run them at High Sierra Music Festival.BTW the 32GB CF card worked great at Harmony Music Fest last weekend.

[su6oxone]

So I got a loaner from them for Deer Creek Phish and will run 4011's>788T.

Nice service!

[F.O.Bean]

So I got a loaner from them for Deer Creek Phish and will run 4011's>788T.

Nice service!

No doubt BUMMER I'll be missing you at DC. I have to miss DC for the 1st time since my 1st trip there in 1998

[blee421]

Another update:So the cable that Trew audio made was the culprit.Sound Devices is sending it back to them with the correct pin layouts and all should be good 2 go.They are going to make me another one.Nic @ Sound Devices tested all 4 bodies with his cable and had it working fine @ 24/96. 

[ianstone]

Another update:So the cable that Trew audio made was the culprit.Sound Devices is sending it back to them with the correct pin layouts and all should be good 2 go.They are going to make me another one.Nic @ Sound Devices tested all 4 bodies with his cable and had it working fine @ 24/96. 

EGGGGGGSELLENT

[Əkoostikal]

Another update:So the cable that Trew audio made was the culprit.Sound Devices is sending it back to them with the correct pin layouts and all should be good 2 go.They are going to make me another one.Nic @ Sound Devices tested all 4 bodies with his cable and had it working fine @ 24/96. 

Very nice!...... I would love to see some pics of this rig (to drool over) 

[blee421]

Update #3

Got my SD 788T back today along with the digital Schoeps bodies.First thing I did was update the software to 1.75.Then plugged all 4 bodies in using the Sound Devices breakout cable.It all works!!!!!I am currently testing the four bodies recording to the 32gb CF card.Tonight I will try to get the analog mics working in synchrony with the digital mics.I will post some pics here soon of it all.I hope this thread helps some folks out down the road if anybody ever goes this route.

Now I have to figure out a way to keep all four Schoeps bodies safe in the bag.I grabbed a pelican box as well as a couple tackle boxes with dividers.Any photos that people have would be greatly appreciated.So glad it works though!!!

[anhisr]

 

[Əkoostikal]