FYI, For those with M-audio delta 44/66, I found an interesting
article: http://www.sm5bsz.com/linarch/linarch02-03/msg00313.html
which I uudecoded and placed here:
http://nielsmayer.com/improving_noise_floor_delta_a2d_conv.doc
"Improving the noise floor of a Delta44 A/D converter (Sept 3 2002)"
Any comments or experience with this mod??
.............................
Regarding the previous thread, the newly won, potential victim of the
quasibalanced output mod:
"Terratec DMX 6fire 24/96"
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180514801725
The attempt: silencing the noise out of my nec xr385/yam db50xg (
http://www.megatrade.ru/English/db50faq.html )
which i think is the result of lack of shielding, bad regulated power
supply, or crap dynex dx-sc51 that has a waveblaster
port, but leaves the db50xg card (about twice the size of the new-tech
soundcard) hanging in the middle of your computer, without even the
groundplane of original ISA-full-length card to protect it...
......
it's basically switching/ground/digital noise unless someone has a
better explanation for sub-50hz noise in a country with 60hz line
voltage:
http://nielsmayer.com/db60xg-jaaa-L-noise.png
shows the noise level at -51db whereas the
right channel is the more-reasonable -65db
http://nielsmayer.com/db60xg-jaaa-R-noise.png
http://nielsmayer.com/db60xg-japa-L-R-noise.png
(note the db50xg itself claims "18 bit output D/A's" so the noise, in
theory, should be well below -96db)
.......
The hope: the new Terratec DMX 6fire 24/96" houses the db50xg in a
separate breakout box, and has halfway decent A/D section, and
probably slightly less sucky input and output analog components than
the equivalent M-audio delta 66 (both cards are supported by Module
snd-ice1712), and probably many times better than the cheap dynex
dx-sc51 (Module snd-ice1724) currently hosting the synth.
https://vsr.informatik.tu-chemnitz.de/twiki/bin/view/Sonstiges/WaveTableSoundCards
"Terratec DMX 6fire 24/96 PCI inside the breakout box, Good as of 2005!"
http://ftp.terratec.de/Documentation/Linux_and_Mac_OSX_Compatiblity.pdf
"the 6fire uses the ICE Envy24, which is supported under Linux by the
Alsa project. The gnu application envy24control offers a very good
control panel derivative.
http://www.soundonsound.com/sos/Apr02/articles/terratecdmx6.asp
http://www.hardwareheaven.com/other-tech-news/640-terratec-dmx-6fire-review.html
http://www.soundonsound.com/sos/mar05/articles/qa0305_6.htm
Niels
http://nielsmayer.com
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Received on Tue Jun 8 00:15:02 2010
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