Support and General Use > Audio Playback, Database and Playlists
-24db Precut Sound Quality on Rockboxxed iPod?
Febs:
--- Quote from: Andhyka on August 08, 2007, 12:15:57 AM ---Dynamic range compression determines the fidelity/clarity/detail of sound, and is related to 16bit/24bit/32bit.
--- End quote ---
You need to go figure out the difference between "dynamic range" and "dynamic range compression." You're just saying nonsense.
Andhyka:
What's your point anyway. I knew that pre-cut is bad halfway of the thread, and I don't intend to use it.
I'm giving the feedback to Rockbox developers to have a look at, from the satisfied users of Rockbox.
If it's possible to implement, then go ahead.
if it's possible to implement and there's no plan to do it, then I don't mind.
If it's not possible to implement, then I'm fine with it.
Andhyka:
Man, of course I know dynamic range.
And everywhere I see it's about how much detail you put in particular frequency range (coarse definition).
Who doesn't know what it is when every computer/audio store is cluttered with HDR SM3 video card, 24-bit audio cards, SACDs, 24-bit audio DVDs.
Edit: Hmm you guys really don't know what I mean, or you are just pretending you don't know about it for whatever purpose. I have had enough discussion and argument about this point anyway.
Edit 2: I just checked the schematics of iPod DAC, and looks like it does not have any amp, outputting line-out all the time, and uses its DAC to control volume digitally. This means the resultant signal will be compressed.
Edit 3: I just re-checked Wolfson DAC specs on iPod. It says it does 24-bit processing inside its chip. Since 16-bit is fed into Wolfson and upscaled to 24-bit inside, I did quick calculation to check what level of volume control would be optimal without loss of SQ. Results: anything above -48db or >25% volume control.
I rest my case.
Overall, you guys did amazing job to Rockbox, and grats to Apple for making some right decision.
Febs:
Read this: http://en.wikipedia.org/wiki/Dynamic_range_compression
Llorean:
1) Do proper research in the future. You're talking with people who know what they're talking about. You've admitted you aren't one, and you're arguing a point you don't know the inner workings of.
2) You don't know how Rockbox works, and are apparently unwilling to learn how it does things internally before claiming there are better ways (if you don't know factually how Rockbox does it, it is physically impossible for you to claim there is a better way). Saying "precut sounds bad" doesn't mean you have any clue how it works, other than an assumption you made based on a statement by one person. Go and read it, and please don't post again in this thread about it until you know what exactly our algorithm is doing.
3) You apparently refuse to admit the existence of the transitive property of mathematics.
Please address all these issues before making statements that relate to them.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version