Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

PC Based Computer music servers, crossovers, and equalization

Soundcard greater than 24-bit
Soundcard greater than 24-bit
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 14th December 2007, 04:13 PM   #1
korneluk is offline korneluk  United States
diyAudio Member
korneluk's Avatar
Join Date: Jan 2005
Location: South Florida
Default Soundcard greater than 24-bit

Are there any soundcards, internal or external, that offer greater than 24-bit (instrumentation quality) recording capability?


-- josť k.
  Reply With Quote
Old 14th December 2007, 04:26 PM   #2
PigletsDad is offline PigletsDad  United Kingdom
diyAudio Member
PigletsDad's Avatar
Join Date: Jul 2007
Location: South Worcestershire
You can get some ADC and DAC cards for measurement use at low data rates at more than 24bits, and you can obviously integrate an external DVM via say IEEE-488. I used to do 81/2 (about digit measurements using an HP3458, but only at 50 readings per second.

Not many signals have more than 24bits of dynamic range in an audio bandwidth - If you have something that is 1V full scale, and you manage a noise floor of 1nV/rtHz you are doing really well, but in a bandwidth of 100kHz, this corresponds to 300nV of noise per sample, so your S/N is about 3,000,000:1, and 24bit data (16,000,000:1) is measuring several bits of noise. If you can keep the same noise floor in a system that is CD level (2V RMS full scale) you are just clear of being Johnson noise limited.

Note that if you don't need full audio bandwidth, you can digitally filter the 24bit data to get extra resolution. This can give several extra bits, if the converter linearity is good enough to make them useful.
  Reply With Quote
Old 14th December 2007, 06:47 PM   #3
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
EC8010's Avatar
Join Date: Jan 2003
Location: Near London. UK
I doubt if there's a genuine monotonic 1/2LSB accurate 24 bit ADC anywhere. Many ADCs produce 24 bits of data but that doesn't mean they're all accurate. Most IC ADCs these days are 1 bit noise-shaped devices that quote "A" weighted S/N ratios with continuous signals; this is very different from a true 24 bit accurate ADC.

To sum up, you can't even get a true 24 bit ADC, certainly not on a soundcard, so forget > 24 bit.
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote


Soundcard greater than 24-bitHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
ANY AMPLIFIER WITH SLEW RATE GREATER THAN 50V/žs? fotios Solid State 36 30th July 2008 11:46 AM
Need 600Watts Or Greater clovi_kate Solid State 8 17th February 2008 08:01 PM
Greater than 20dB gain at DC with Linkwitz Transform - bad? Jim85IROC Subwoofers 14 25th November 2006 04:49 PM
Elliptic crossover ( greater then 4th order LR) Hybrid fourdoor Multi-Way 11 6th November 2004 05:06 PM

New To Site? Need Help?

All times are GMT. The time now is 10:59 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio