Comments on this RMAA test

JGSF · Feb 11, 2007, 05:15 PM

Hi!

After I finally managed to get my cards recording at 96Khz/24-bit, I decided to make some rmaa tests since I am having some free time, and I got a bit surprised...

notes:
- SB0244 is the Audigy 2 bulk model and SB0350 is the Audigy 2 ZS.
- I2S 1 is the rear line in and I2S 2 is the aux2 in on the external drive (sb0350).
- first card is the output, second is the input and the I2S codec used for the recording.

(can't i post images in here??).

The detailed test can be found here.

Max M. · Feb 11, 2007, 11:39 PM

i doubt if there's any interest in those tests today but here's most obvious comments:
green and white: too much power supply hum (50Hz and its harmonics) - bad cable?
purple one: it is 16 bit - wrong setup?
and only cyan result looks like what can be expected from A2 at 24/96.

JGSF · Feb 12, 2007, 12:01 AM

Green/white are a 3,5mm-rca stereo cable, cyan/purple are a 3,5mm-3,5mm stereo cable.

As for the 16-bit... both dsp's were cleared (totally empty) and waveHQ in/out were used, with the 96khz padded to 32-bit format.

If there was sound in the output, it had to come from the p16v chip, i think... (?)

Yep, I agree this might be pretty useless, but I just did it for curiosity... I had never tried to mess around with the p16v chip and decided to give it a try today...

Max M. · Feb 12, 2007, 12:15 AM

>both dsp's were cleared (totally empty)

btw. that's not a good idea to leave the dsp totally clean - with no code the dsp is internally switched to a sort of default mode ('every dsp input is connected t oevery dsp output one by one') - and then it can 'play' anything from 'silence' to 'random noise' depending on model. So the really 'clean dsp' is a 'clean one with loaded but not connected epilog'.

As for my comments, well, they are just what i can see in those graphics - nothing more.

Maddogg6 · Feb 12, 2007, 09:30 PM

Quote:

Originally Posted by Johnny1982

Green/white are a 3,5mm-rca stereo cable, cyan/purple are a 3,5mm-3,5mm stereo cable.

As for the 16-bit... both dsp's were cleared (totally empty) and waveHQ in/out were used, with the 96khz padded to 32-bit format.

If there was sound in the output, it had to come from the p16v chip, i think... (?)

You might have wanted to disconnect the DSP from the outputs on the ZS (or both if possible??) for this test (in the KX 24/95 router) - well, I would have anyways. Then the cleared DSP thing max mentioned, I would think, becomes moot. ??

Feb 11, 2007, 05:15 PM	#1
JGSF HardwareHeaven Senior Member Join Date: Jul 2004 Posts: 452 Rep Power: 0	Comments on this RMAA test Hi! After I finally managed to get my cards recording at 96Khz/24-bit, I decided to make some rmaa tests since I am having some free time, and I got a bit surprised... notes: - SB0244 is the Audigy 2 bulk model and SB0350 is the Audigy 2 ZS. - I2S 1 is the rear line in and I2S 2 is the aux2 in on the external drive (sb0350). - first card is the output, second is the input and the I2S codec used for the recording. (can't i post images in here??). The detailed test can be found here.

Feb 12, 2007, 12:01 AM	Thread Starter #3
JGSF HardwareHeaven Senior Member Join Date: Jul 2004 Posts: 452 Rep Power: 0	Green/white are a 3,5mm-rca stereo cable, cyan/purple are a 3,5mm-3,5mm stereo cable. As for the 16-bit... both dsp's were cleared (totally empty) and waveHQ in/out were used, with the 96khz padded to 32-bit format. If there was sound in the output, it had to come from the p16v chip, i think... (?) Yep, I agree this might be pretty useless, but I just did it for curiosity... I had never tried to mess around with the p16v chip and decided to give it a try today... __________________ My kX plugins (actually it's only one )

Feb 11, 2007, 11:39 PM	#2
Max M. h/h member-shmember Join Date: Dec 2002 Location: Evil Empire Posts: 2,639 Rep Power: 69	i doubt if there's any interest in those tests today but here's most obvious comments: green and white: too much power supply hum (50Hz and its harmonics) - bad cable? purple one: it is 16 bit - wrong setup? and only cyan result looks like what can be expected from A2 at 24/96.

Feb 12, 2007, 12:15 AM	#4
Max M. h/h member-shmember Join Date: Dec 2002 Location: Evil Empire Posts: 2,639 Rep Power: 69	>both dsp's were cleared (totally empty) btw. that's not a good idea to leave the dsp totally clean - with no code the dsp is internally switched to a sort of default mode ('every dsp input is connected t oevery dsp output one by one') - and then it can 'play' anything from 'silence' to 'random noise' depending on model. So the really 'clean dsp' is a 'clean one with loaded but not connected epilog'. As for my comments, well, they are just what i can see in those graphics - nothing more.