Super Bit Mapping [Archive]

Stateless

03-15-2003, 11:40 AM

I had a couple quick questions about SBM and was wondering if you guys could help me out. I am using a Sony CD burner that has an optional SBM button for use when you record in analog from a 24-bit high quality sound source. My question is, when would I use this? I am about to record some music off of a DVD in analog. Is that a 24-bit sound source? Does it matter if it is? What about audio from VHS? I just want to know if there are instances when I should use this button or if I should I ignore it completely. That's for the help in advance. :)

WW

Gerry

03-15-2003, 03:40 PM

Use SBM only when recording greater-than-16-bit digital audio data streams (on your consumer deck it may only be applicable to 24-bit streams, or maybe not). Ignore it anytime you're recording analog regardless of source.

Stateless

03-15-2003, 04:04 PM

Holy Zoo

03-15-2003, 04:27 PM

Originally posted by Gerry
Use SBM only when recording greater-than-16-bit digital audio data streams (on your consumer deck it may only be applicable to 24-bit streams, or maybe not). Ignore it anytime you're recording analog regardless of source.

Gerry, are you sure of this? From what I remember reading before I bought this, the SBM switch on the CDRW33 applies to the *analog* inputs only.

Ah... here tis, from the product description:

Selectable DSP functions available on the analog inputs, including: SBM® (Super Bit Mapping® recording-providing high quality recording and noise reduction), 3-band mid-Parametric EQ and Limiter.

Stateless

03-15-2003, 04:41 PM

:confused:

Do you still think I should ignore it given what I'm recording?

Holy Zoo

03-15-2003, 05:00 PM

I always have the SBM switch on when recording from analog, and my results have been fantastic.

Maybe I'm completely out to lunch on this... but I don't think I am. :)

jeff

PMC7027

03-15-2003, 05:03 PM

I always use SBM on my Sony PCM-R300 DAT deck when recording from an analog source (my TT) and have always had great results.

The way I understand it as that SBM is a noise shaping process developed by Sony. It certainly would be useful when the machine is performing A/D conversion.

Stateless

03-15-2003, 05:13 PM

So if you have it use it, is what I'm sensing. My set up is very basic. I'm just plugging the burner directly to the DVD player, same thing with the VHS. Does that make any difference?

Holy Zoo

03-15-2003, 05:38 PM

Nope, if you're plugging into the analog inputs, shouldn't make a difference. DVD, VHS, Turntable, old Casette recorder... if it's coming in through rca jacks in the back of the burner, should be fine. Just set your levels so that you never go into the red, and record.

Stateless

03-15-2003, 05:59 PM

Originally posted by Holy Zoo
Nope, if you're plugging into the analog inputs, shouldn't make a difference. DVD, VHS, Turntable, old Casette recorder... if it's coming in through rca jacks in the back of the burner, should be fine. Just set your levels so that you never go into the red, and record.

Just tried it out. Seems fine. Thanks for the info.

Steve Hoffman

03-15-2003, 06:02 PM

What Holy Zoo said.

-=Rudy=-

03-15-2003, 07:13 PM

Sony used to sell an outboard SBM A/D converter that seemed like it was just an expensive little black box. You could then feed this digitally into a standard (non-SBM) device. Any know if this little thing is still around? If I had to guess, the model was an SBM-1.

Holy Zoo

03-16-2003, 07:42 AM

Rudy - I have this theory that you can find anything on ebay. And sure enough...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3013230386&category=3281

-=Rudy=-

03-16-2003, 08:39 AM

Hey...one finally turned up! I think I'll "Watch This Item" *click* and see if anyone buys it.

Jeffrey

03-17-2003, 06:45 AM

Originally posted by Holy Zoo
I always have the SBM switch on when recording from analog, and my results have been fantastic.

Maybe I'm completely out to lunch on this... but I don't think I am. :)

jeff

Hi,

I have the same unit Jeff does and use it the same way. Hey Jeff, pass the ketchup! :)

-Jeffrey