Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.
You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

RE: Chord up-samples?

Posted by Todd Krieger on June 21, 2017 at 19:23:31:
"What is the interpolating filter really doing? It's outputting sample values *as if we had sampled the original signal at the new higher rate in the first place*"

This is the very thing a lot of digital audio sales ads want unsuspecting consumers to believe..... (This has been going on for over 20 years.) But resolution cannot be improved beyond that of the original data on the media.

The interpolation filter in essence "connects the dots" between the original samples. In a way which preferably doesn't corrupt the original signal. In the frequency domain, the filter removes frequency reflections beyond half the sample rate frequency.

The oversampling is simply the digital application of filtering. (An analog application would be to add an LCR circuit following non-oversampled conversion.) It cannot enhance resolution.