Welcome Guest ( Log In | Register )

AAC encoding from dff files
post Jan 31 2012, 10:51
Post #1

Group: Members
Posts: 718
Joined: 10-January 06
From: Zagreb
Member No.: 27018

Hello all.

I have a question; I have a tune in dff (sacd rip) format which I obtained by shady sources, and it is not relevant for this discussion.

What I want to know is, how to encode it to aac? I am using foobar2000, and I loaded dff decoder plugin, and the song plays fine. But drum at the beginning peaks far above 0 dB, I guess it goes to +6. When I encode it to AAC, I use sox resampler plugin to convert it to 44100, but then it also peaks far above, but a bit less, I guess something about +3 or +4. I think it is because it is decoded AFAIK to 32bit float, which can handle higher peaks. I don't hear distortion whatsoever in original and encoded file, at least not on my desktop speakers, I haven't done any ABX test.

The question is - is this OK? I know mp3 doesn't have bit depth in the normal way wav file has; but I don't know about AAC. Can it handle that high input for encoding and decode it properly, without artifacts, or would I have to use some sort of peak limiting before encoding, or just decode it to wav and then load it up in Audacity and normalize it's peak limits to zero?

Thank you.
Go to the top of the page
+Quote Post

Posts in this topic

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:


RSS Lo-Fi Version Time is now: 25th November 2015 - 18:25