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Hotrodding the X-Fi: A Layman's Guide (No 56k) - Page 76

post #1126 of 2194
Quote:
Originally Posted by germanium View Post
Your graphs look excellent but it appears that the test was for 96KHz but the card sample rate was set for 48KHz. The noise floor looks very clean. Any distortion in the dynamic range test is completely buried by noise from the less than ideal adc chip.
Thanks for the feedback, Germanium...
- yeah, RMAA setup was 24b / 96khz, for that test
- were does one select/check for sample rate? (using demo version, RMAA v6.0.5)
post #1127 of 2194
Quote:
Originally Posted by bichi View Post
Thanks for the feedback, Germanium...
- yeah, RMAA setup was 24b / 96khz, for that test
- were does one select/check for sample rate? (using demo version, RMAA v6.0.5)
Audio creation mode there is a button in the lower left hand corner that says settings. There you can set the master sample rate of the card. You can also select bit matched playback there
post #1128 of 2194
Quote:
Originally Posted by germanium View Post
Audio creation mode there is a button in the lower left hand corner that says settings. There you can set the master sample rate of the card. You can also select bit matched playback there
Nope, don't see it
- will have to poke around Creative stuff.
- maybe because you have a more advanced model?
post #1129 of 2194
Quote:
Originally Posted by bichi View Post
Nope, don't see it
- will have to poke around Creative stuff.
- maybe because you have a more advanced model?
You have to go to the mixer for Audio creation mode. Not the console.
post #1130 of 2194
Quote:
Originally Posted by germanium View Post
You have to go to the mixer for Audio creation mode. Not the console.
ahhh...
- don't have Creative Mixer installed...
- will do and retest, probably tomorrow.
- thanks for the tip!
post #1131 of 2194
Quote:
Originally Posted by bichi View Post
ahhh...
- don't have Creative Mixer installed...
- will do and retest, probably tomorrow.
- thanks for the tip!
I have photos of my RMAA tests but would have to send the direct to you through msn or some other program that does file transfers.
post #1132 of 2194
forgot its Labor Day holiday tomorrow and stay up a bit later.....

Thanks to Germanium, corrected sample rate settings for RMAA tests, "audio-creation" mode, with Creative "Volume Panel":
- had to install. (never cared for simplified, PC-screen, "sound board mixers")

(44k/16b) - C91, C119: 6.8uf @ 25vdc tant from Wincap 10uf @ 16vdc - (corrected sample rate setting: 44khz)
http://www.esnips.com/doc/74980e5b-8.../X-FI-MOD-026b

(96k/24b) - C91, C119: 6.8uf @ 25vdc tant from Wincap 10uf @ 16vdc - (corrected sample rate setting: 96khz)
http://www.esnips.com/doc/4f06eff5-9.../X-FI-MOD-027b

RMAA v6.0.5 - [24b/96k] - HTML and GIFs - ZIPPED - (corrected sample rate setting: 96kz)
http://www.esnips.com/doc/7a5a181a-1.../X-FI-MOD-028b
post #1133 of 2194
Quote:
Originally Posted by bichi View Post
forgot its Labor Day holiday tomorrow and stay up a bit later.....

Thanks to Germanium, corrected sample rate settings for RMAA tests, "audio-creation" mode, with Creative "Volume Panel":
- had to install. (never cared for simplified, PC-screen, "sound board mixers")

(44k/16b) - C91, C119: 6.8uf @ 25vdc tant from Wincap 10uf @ 16vdc - (corrected sample rate setting: 44khz)
http://www.esnips.com/doc/74980e5b-8.../X-FI-MOD-026b

(96k/24b) - C91, C119: 6.8uf @ 25vdc tant from Wincap 10uf @ 16vdc - (corrected sample rate setting: 96khz)
http://www.esnips.com/doc/4f06eff5-9.../X-FI-MOD-027b

RMAA v6.0.5 - [24b/96k] - HTML and GIFs - ZIPPED - (corrected sample rate setting: 96kz)
http://www.esnips.com/doc/64878699-c.../X-FI-MOD-028b
Hmmm, still shows like its at 48KHZ. early rolloff. You need to set the recording sample rate & bit depth in the lower right hand side of the mixer as well.
post #1134 of 2194
yeah, my brain-fart
- posted the wrong file
- http://www.esnips.com/doc/7a5a181a-1.../X-FI-MOD-028b
post #1135 of 2194
Quote:
Originally Posted by bichi View Post
yeah, my brain-fart
- posted the wrong file
- http://www.esnips.com/doc/7a5a181a-1.../X-FI-MOD-028b
much better
post #1136 of 2194
I suspect that the reason my 2nd harmonic distortion went up is because of the D.C. offset due to D.C. coupling. All othe distortion componants are lower on my card than the stock card.
post #1137 of 2194
well krappers!
- gotta set BOTH sample rate AND record rate?
- geeeeeeze....
- need a snack before any more RMAA test fun.....
post #1138 of 2194
ha!
- three RMAA crashes, with Creative Volume panel
- Creative set for 96k sample and record set for 96k 24b
- RMAA set for 96k/24b test.....

Will plod on tomorrow.....
- twists Germanium's gain bias pot to high....
post #1139 of 2194
Here is link to my tests on Esnips http://www.esnips.com/web/X-FiRMAAtests/

Notice how clean the noise floor is compared to creatives own tests & how you can see all the harmonic distortion spurie all the way up to 44KHz because the noise floor is so low. Here you can also see the increased second harmonic but everthing else is lowered. This is probably due to the D.C. coupling as there is about 100mv D.C. offset at the output.

Notice also the very very low IMD at high frequencies on my modded card. The stock card is really quite bad up there especially beyond 30KHz. One may think that that is ok but IMD products frequently get dumped back into the audio band & are quite audible potentially even at that level if the products make it back into the 1-5KHz range.
post #1140 of 2194
Hi, Germanium, you have lots of explanations since post #1055, do you have other mods besides the ones stated in your post #1055?

http://www.head-fi.org/forums/showpo...postcount=1055

Thanks!

Another question, you said in #1112 that "Bass is rock solid but with ambiance not heard before. This can still be improved apon with bigger bypasses on the +/- 12 volt caps. ", but in your #1055, you said, bypass with 1 3.3uf is fine, do you suggest more capacitance metalized cap here?

http://www.head-fi.org/forums/showpo...postcount=1112
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