Topic: Edirol R-09HR - Part THREE

[guitard]

DOWNLOAD THIS (save target as) : www.sonicstudios.com/sdhctopc.pdf
 

Very imformative - thanks!

[dactylus]

So the question is:  Is the Class 4 SDHC guaranteed minimum Data Transfer Rate of 4MB/sec sufficient for the R-09HR or would the Class 6 SDHC guaranteed minimum Data Transfer Rate of 6MB/sec be more suited for our audio recording purposes?  I typically record at 24/48...

24/48 ->
3*2*48000 bytes/s or about 0.28 MB/s
Your card needs to be at least as fast as your audio stream is coming in.

Very interesting.  This may be a dumb question but can you explain how you came up with that formula?  How would that vary if recording at 24/96?

 

[aaronji]

So the question is:  Is the Class 4 SDHC guaranteed minimum Data Transfer Rate of 4MB/sec sufficient for the R-09HR or would the Class 6 SDHC guaranteed minimum Data Transfer Rate of 6MB/sec be more suited for our audio recording purposes?  I typically record at 24/48...

24/48 ->
3*2*48000 bytes/s or about 0.28 MB/s
Your card needs to be at least as fast as your audio stream is coming in.

Very interesting.  This may be a dumb question but can you explain how you came up with that formula?  How would that vary if recording at 24/96?

 

I may be wrong, but:

8 bits per byte, so a 24 bit sample is 3 bytes, times 2 channels (stereo), times 48000 samples per second...

[Tenn Man]

Are the built-in microphones on the Edirol R-09HR omnis or cardioids?

[jmz93]

Are the built-in microphones on the Edirol R-09HR omnis or cardioids?

OMnis. I havn't tried constructing some sort of baffle for them yet, but plan to, either out of some sort of sphere, or maybe a folded mouse pad.

Anyway, I find the mics in the HR sound better than the ones in the original R9 ... less peaky in the treble.

[guitard]

Are the built-in microphones on the Edirol R-09HR omnis or cardioids?

I asked Chris Church this question (he can do a mod for the built-in mics) and I believe he said they are omnis.

[Dede2002]

Alright ~ time for a stupid question!

How does the SDHC class numbers work?  In other words, which is better for an Edirol R-09HR ~ class 2 ~ class 4 ~ or class 6?

TIA ~~

Everything you want to know about SDHC class rating is in a sdhctopc.pdf file!

  DOWNLOAD THIS (save target as) : www.sonicstudios.com/sdhctopc.pdf
 

Thanks for the info. Great reading.
+T

[Gutbucket]

Are the built-in microphones on the Edirol R-09HR omnis or cardioids?

OMnis. I havn't tried constructing some sort of baffle for them yet, but plan to, either out of some sort of sphere, or maybe a folded mouse pad.

If you use the internal mics much, do it.  It will improve the stereo imaging dramatically.  Jeklin disk all-in-one recorder.    See the first two posts here.

[jobseek2001]

So the question is:  Is the Class 4 SDHC guaranteed minimum Data Transfer Rate of 4MB/sec sufficient for the R-09HR or would the Class 6 SDHC guaranteed minimum Data Transfer Rate of 6MB/sec be more suited for our audio recording purposes?  I typically record at 24/48...

24/48 ->
3*2*48000 bytes/s or about 0.28 MB/s
Your card needs to be at least as fast as your audio stream is coming in.

Very interesting.  This may be a dumb question but can you explain how you came up with that formula?  How would that vary if recording at 24/96?

I may be wrong, but:

8 bits per byte, so a 24 bit sample is 3 bytes, times 2 channels (stereo), times 48000 samples per second...

Correct.
For 96000Hz versus 48000 you double the number 48000 in the formula.
It's:

(Number of bytes per sample * number of channels * samplerate) / (1024 * 1024)  MB/s

[dactylus]

So the question is:  Is the Class 4 SDHC guaranteed minimum Data Transfer Rate of 4MB/sec sufficient for the R-09HR or would the Class 6 SDHC guaranteed minimum Data Transfer Rate of 6MB/sec be more suited for our audio recording purposes?  I typically record at 24/48...

24/48 ->
3*2*48000 bytes/s or about 0.28 MB/s
Your card needs to be at least as fast as your audio stream is coming in.

Very interesting.  This may be a dumb question but can you explain how you came up with that formula?  How would that vary if recording at 24/96?

I may be wrong, but:

8 bits per byte, so a 24 bit sample is 3 bytes, times 2 channels (stereo), times 48000 samples per second...

Correct.
For 96000Hz versus 48000 you double the number 48000 in the formula.
It's:

(Number of bytes per sample * number of channels * samplerate) / (1024 * 1024)  MB/s

Thank you - +T's for the information!!

 

[digifish_music]

Thank you - +T's for the information!!

 

BTW: Sound Devices has the following calculator...

http://www.sounddevices.com/calculator/

digifish

[Dede2002]

Maybe it's a coincidence, but honestly I don`t think so.
I updated my R-09HR two days ago to the new Ver.!.05 firmware. Well, since than the weirdest thing is going on. Sometimes ( always at the worst time) when I turn my unit On, the display freezes on the Edirol R-09HR- Enjoy Recording Ver. 1.05 image appears. I have to remove the batteries, insert them again and press the Power button to turn the thing On.
Any guess? I' considering a down grade to th Ver.1.04 but I don't know if I can do that.
Appreciate any help from you guys.Thanks in advance 

[GregDunn]

Hmmm.... this just happened to me as well.  And I had to remove the batteries to turn off the unit.  I tried it three more times afterward, but it hasn't hung up again so far.  Might be an issue with the update?

[Dede2002]

Hmmm.... this just happened to me as well.  And I had to remove the batteries to turn off the unit.  I tried it three more times afterward, but it hasn't hung up again so far.  Might be an issue with the update?

Well, I'm not alone. Seems to be an issue with the update indeed.
And I don't know what to do 
Have you contacted Roland US? See, I'd do this myself but I can't. I live overseas and they only accept contact when you provide an US address. Of course I can always contact Roland Brasil, but they are known around here for their automatic responses and, to be honest, I'm sure they are not going to help me at all.

[digifish_music]

Hmmm.... this just happened to me as well.  And I had to remove the batteries to turn off the unit.  I tried it three more times afterward, but it hasn't hung up again so far.  Might be an issue with the update?

Well, I'm not alone. Seems to be an issue with the update indeed.
And I don't know what to do 
Have you contacted Roland US? See, I'd do this myself but I can't. I live overseas and they only accept contact when you provide an US address. Of course I can always contact Roland Brasil, but they are known around here for their automatic responses and, to be honest, I'm sure they are not going to help me at all.

The first thing you should try is to re-install the update...and or re-install 1.04 if that doesn't work.

digifish