Topic: Hosa ODL-312 Bit Accuracy Results

[caymanreview]

how can i sync up the 2 recordings to the correct samlpes? so that i can compare them with eac?

i posted this in the computer section also

[Lee]

Yes, it sounds as if you are doing it right.  Just asking because between the first 20 and 30 samples, the Jukebox 3 hiccups for a few samples, almost always.  I don't recall which firmware I'm running, but it's the latest.  

It's not an issue for me as I always start the deck a few minutes early anyways.

yeah, just give it about 15-20 seconds of lead time and you're good to go.  Another trick I've learned is to start your recording way early, then pause it (similar to pause/record on the sonys) until you're ready to go for good.  That eliminates some of the problems, especially if you're not good at anticipating...

[Brian Skalinder]

Yes, it sounds as if you are doing it right.  Just asking because between the first 20 and 30 samples, the Jukebox 3 hiccups for a few samples, almost always.  I don't recall which firmware I'm running, but it's the latest.  

It's not an issue for me as I always start the deck a few minutes early anyways.

yeah, just give it about 15-20 seconds of lead time and you're good to go.  Another trick I've learned is to start your recording way early, then pause it (similar to pause/record on the sonys) until you're ready to go for good.  That eliminates some of the problems, especially if you're not good at anticipating...

Cool, thanks for that info, guys.  I'll try a field test and check the first 30 seconds or so to see how it goes.  I suspect just as you say.

I suck at anticipating, so...I'm trying to get into the habit of starting up a few minutes early.  Easier to do with peace of mind on the JB3 than on a 2hr DAT that I'm not sure will get me through the whole set!  

[F.O.Bean]

excellent, HUGE +T brian....i now will get that converter to do the same you are doing, TRYING to eliminate dat....

thanks again brian,very cool...

bean

Not sure exactly what gear you're using these days, Bean, but the equivalent model for coax S/PDIF <-> optical S/PDIF is the Hosa ODL-276.  Keep in mind I've [a] not tested the -276 (only the -312), and unless you're using a V3, your S/PDIF transmitter may be different.  So, I'd recommend bit-accuracy testing with your specific format converter and input/output devices.

i plaN On running it w/ a v3, but the AES out on my dmic would work, correct???

[Brian Skalinder]

I assume so, but haven't tested it with that device, so...never know?

[F.O.Bean]

I assume so, but haven't tested it with that device, so...never know?

cool, thanks brian..id buy one and do some tests of my own.......but working a bunch is limiting what i can tape aT THE moment

[Nick in Edinboro]

Yes, it sounds as if you are doing it right.  Just asking because between the first 20 and 30 samples, the Jukebox 3 hiccups for a few samples, almost always.  I don't recall which firmware I'm running, but it's the latest.  

It's not an issue for me as I always start the deck a few minutes early anyways.

This might sound retarded but how long is a "sample"?

I know my JB3 likes to do what I can describe as a worbly pop at the beginning of a recording but it's all of maybe a second long if that.

[zowie]

Does the HOSA work with higher bit depth & sample rates too?

[Brian Skalinder]

I assume it supports whatever bit-depths and sample rates are provided by the AES/EBU and S/PDIF standards, but I don't know for certain.

[F.O.Bean]

I assume it supports whatever bit-depths and sample rates are provided by the AES/EBU and S/PDIF standards, but I don't know for certain.

and youre running it out of the pro or consumer side???......also, do you use a 110>75 transformer or does the converter take care of that too....

thanks,
 bean

[Brian Skalinder]

Right now I've only tested out of the V3 AES consumer output.  I'm gonna do some mimimal testing out of the AES pro transmitter after Xmas.

I do not use a 110 > 75 ohm impedance transformer.  I don't think the resistance issue is applicable in optical.  I don't really know if it translates 110 > 75 before converting to optical.  I suspect not as I can't think of a reason why it would or should convert 110 > 75 ohms.

[caymanreview]

im thinking about picking the unit up to do aes pro from my mini me > optical... but i havent decided yet

[F.O.Bean]

Right now I've only tested out of the V3 AES consumer output.  I'm gonna do some mimimal testing out of the AES pro transmitter after Xmas.

I do not use a 110 > 75 ohm impedance transformer.  I don't think the resistance issue is applicable in optical.  I don't really know if it translates 110 > 75 before converting to optical.  I suspect not as I can't think of a reason why it would or should convert 110 > 75 ohms.

thanks brian, the reason for the 20 questions is if this all works out(which it seems to be bit-perfect and all that), ill be running v3>converter>jb3 for a backup/easy transfer kinda thing 8)i appreciate all the knowledge you've spread, +T brian....

bean

[chase]

This might sound retarded but how long is a "sample"?

hertz units s^-1  or 1/s or 1 cycle per second.  so for example, kilo = thousand in SI units , so 48kHz means there are 48,000 samples per second.   so if there are only pops in the first 20-30 samples.

i.e.   25/48000 = 5.2 x 10^-4 seconds

so 16bit 48kHz really means there are 48,000 points at which 16 bits of data are collected.

[Nick in Edinboro]

This might sound retarded but how long is a "sample"?

i.e.   25/48000 = 5.2 x 10^-4 seconds

Thanks chase..!  damn with a sample being .00052 seconds long u'd think we'd be able to drop a few here and there just kidding of course

Had I put the thought into it like sample rate I should've figured that out on my own.. for some reason I was trying to picture a .wav in, persay, cool edit and how you'd highlight a sample or whatever.. thinking it was some other form of digital editing "measure"..

Sorry for that dumb question Great answer though! +T