Everything about the Pre-Amp value!!!

Asharin · October 16, 2006, 11:22:45

Quote from: "LPChip"
Quote from: "Asharin"I've always left the pre-amp setting alone :p

I'm not sure if the setting is good by default though...

That's okay my music is crap enough that the volume doesn't afect it much

speed-goddamn-focus · October 16, 2006, 15:22:03

Quote from: "Atlantis"I really don't see why would you want to downscale based on the number of channels though.

To avoid clipping. Mixing is basically adding, which means that if two channels hit 0dB at the same time (not completely unlikely) you get 6dB. The higer number of channels you get, the higher the possible peaks get, even if they become more unlikely as you add channels.

xaimus · October 16, 2006, 17:13:30

That seems like a vestigial feature--the user should modify the mix to avoid such situations, not the sequencer/tracker.

speed-goddamn-focus · October 16, 2006, 20:54:01

Quote from: "xaimus"That seems like a vestigial feature--the user should modify the mix to avoid such situations, not the sequencer/tracker.

Well I don't *really* know how it works, I'm just pretending. I thought I had it all figured out then I started thinking about the virtual channels and I got a headache. On another note, I agree with Rewbs that there is absolutely no reason for this discussion to be posted as an announcement.

rewbs · December 22, 2006, 00:21:47

De-announcing. This thread is interesting but does not need to live at the top of the list.

Rxn · April 19, 2009, 22:12:15

Hi guys,

I was wondering actually about this pre-amp thing today. How does this actually work?

For example, we have a 16 bit normalized sample, how does pre-amplification work for it? You cannot increase the volume without it going into clip.

Sam_Zen · April 19, 2009, 23:11:09

Nice bump

Saga Musix · April 20, 2009, 13:02:11

The internal mixer routines are working with 32-bit precision, as the manual says.

Rxn · April 20, 2009, 13:05:29

Hi Jojo,

so what is the chain of conversion in this case?

Sample->convert to 32 bits (zero padding?)->multiply by Pre-Amp value->all the rest of operations?

Saga Musix · April 20, 2009, 13:40:09

I dunno :> But judging from the results, that sounds quite plausible.

Rxn · April 20, 2009, 13:52:52

I thought a developer might know that

LPChip · April 20, 2009, 14:12:21

Are you using the RC3 or RC2 mixmode settings?

By default from .48 and on, the mode has been set to RC3. In such cases, the pre-amp value is no longer being taken into account.

Saga Musix · April 20, 2009, 14:20:23

Rxn: Sure, but I have never touched the mixer routines since I've been a developer (read: since last october).

Rxn · April 20, 2009, 14:23:23

Hi LPChip,

I would like to figure out how both of them work. What is the conversion chain in RC3 including all the volume controls along the sample path?

The reason why I am asking is because it struck me that we might be losing resolution bits in samples if conversion\amplification steps are not done properly and\or in a right sequence.

LPChip · April 20, 2009, 16:20:43

Quote from: "Rxn"Hi LPChip,

I would like to figure out how both of them work. What is the conversion chain in RC3 including all the volume controls along the sample path?

The reason why I am asking is because it struck me that we might be losing resolution bits in samples if conversion\amplification steps are not done properly and\or in a right sequence.

Have you actually read the posts on the first page of this topic? Its being explained there by Rewbs.