Besweet 1.3 Options Explaination

[Dali Lama]

Hi,

I would like some more details about the various options in Besweet. Is there a place where I can go to get information about:

1. The difference between "Auto Find Maximum Gain" in Azid and "Auto Gain" in Besweet.

2. The difference between Stereo, Surround, Surround2 in Azid

3. The effect of Dialog Normalization Reduction in Azid.

4. What does average db and maximum db values mean in Boost.

5. How do the three different compression modes affect Boost.

Thanks,

Dali

[DSPguru]

1. Azid's gain uses Azid's engine to find maximal gain, and let Azid apply the gain, while OTA's gain runs all over the samples without caring about their origin (if they came from ac3/mpa/wav..) and then apply the gain by itself.
Azid's gain works faster (relevant only for AC3 source, naturally), while OTA's gain is more accurate and includes a clip Smoother engine.

2. Stereo means you'll get the L&R channels out of a 5.1 signal, with surround you'll get a 2ch signal that includes information taken from all 5.1 channels and can be decoded with Dolby ProLogic decoder to a surround channel back again. surround2 is a newer method to downmix the 5.1 signal into two channels in a way a Dolby Prologic II decoder can produce a more accurate reproduction of the original file.
to summarize, assuming you have a relevant decoder you get :
Stereo - information of 2 channels.
Surround - information of 4 channels (rear is mono)
Surround2 - information of 5 channels (stereo rear)
most amplifiers can reproduct a LFE channel, so that doesn't really matter.

3. Dialog normalization is used to force different ac3 track to have the same playback loudness. in case you're going on a two-pass, this doesn't change anything.

4. BeSweet only offers a Manual DRC Algorithm.

5. each mode has his own way of compressing the dynamic range. see the transmission graph, and give it a listening test.

[Dali Lama]

Great!

Thanks for the answers.

But, question four IS reffering to the Manual db settings?

Also, What do you mean by 2-pass. I am outputing to wav. Does using Auto Gain count as 2-pass?

Thanks again,

Dali

[DSPguru]

Originally posted by Dali Lama
But, question four IS reffering to the Manual db settings?but it can't.. :)
this switches only affects Automatic Boosting.

Also, What do you mean by 2-pass. I am outputing to wav. Does using Auto Gain count as 2-pass?yeap. auto gain involves 'running' twice on the inputfile.

ps,
it would be nice if you could share your prefered boosting algorithm and factors.

[Dali Lama]

Ok,

Forgive me, I was referring to the "AUTO" db settings, not manual.

I have been using the manual settings of

Boost Factor: 2
Limit Factor: 0.95

Compression Mode: LigH or Dg

This treatment seems to not destroy the natural curve. Rather it boosts it while retaining curve shape. Dg does the best job of that, followed by LigH, but Tera seems way off, or am I way off? :sly:

After reading the bubble help, I wanted to try the auto boost factor, but I don't understand what Average db and Maximum db mean or what values are sensible. In the bubble help it says that you might achieve slightly lower boost results than desired, which is exactly what I want. I'd rather be safe and not boost too much.

And can you give a brief understanding of what those curves mean? X/Y axis values, etc.

Wow, I am learning a lot, thanks,

Dali

P.S. When I try to get bubble help on the Azid Dynamic Compression setting, the bubble flashes rapidly on and off and I can't read it. All others work to my knowledge. Maybe a little bug.

P.S.S I tried to use Auto Boost with default db settings, but whenever I press AC3 to Wav it reverts to Manual Boost? Even when I toggle between windows from Boost to Azid it changes from Auto to Manual?

[DSPguru]

Originally posted by Dali Lama
or am I way off? :sly: no, you're not.. :)

In the bubble help it says that you might achieve slightly lower boost results than desired, which is exactly what I want. I'd rather be safe and not boost too much.a boost of 2 isn't that much. you could try setting 4db or 3db for even softer boosting. (2 ~ 6db)

And can you give a brief understanding of what those curves mean? X/Y axis values, etc.hehe! i'm not the right person to be asked questions about curves. hihi..
graphs usually fails to mean anything to me. i only care about the algorithms, never about their visual shape.
i know that for most ppl visual demonstration gives better undertsanding of things, but i have a problem with this (a built-in fuck. i admit..) - my way of thihking is too abstract and my visual thinking sux badly.
if you'll ask me, i would tell you that the graph isn't really relevant in this case, because it shows what happen to the signal in range of [-1,1] (well, only [0,1] - but it's symmetric), while the true meaning of compression takes part on overflows (where signal larger than 1 being compressed to the range of [-1,1]).

P.S. When I try to get bubble help on the Azid Dynamic Compression setting, the bubble flashes rapidly on and off and I can't read it. All others work to my knowledge. Maybe a little bug.time to buy a bigger screen ;) ?

P.S.S I tried to use Auto Boost with default db settings, but whenever I press AC3 to Wav it reverts to Manual Boost? Even when I toggle between windows from Boost to Azid it changes from Auto to Manual? did you set the correct path of WaveBooster ?

[1loser]

Originally posted by Dali Lama
P.S. When I try to get bubble help on the Azid Dynamic Compression setting, the bubble flashes rapidly on and off and I can't read it. All others work to my knowledge. Maybe a little bug.
The bubble flashes for me also and I have a large monitor.

[1loser]

Is the boost feature ONLY when the source is a wav file or you want to create a wav file?

Is boost for normalization?

[DSPguru]

resolution ?

[DSPguru]

Originally posted by 1loser
Is the boost feature ONLY when the source is a wav file?

Is it for normalization? no & no.

[1loser]

I tried different resolutions and none worked. I use 1024 x 768.

I think the movie 12 angrymen is dolby mono. Do I really need to change any settings in Besweet GUI to reflect that or can I keep it as stereo?

angrymen AC3 T01 2_0ch 192Kbps DELAY 12ms.ac3

[DSPguru]

Originally posted by 1loser
angrymen AC3 T01 2_0ch 192Kbps DELAY 12ms.ac3 i believe you can use the usual BeSweetGUI preset.

[smokva]

Originally posted by 1loser
The bubble flashes for me also and I have a large monitor.

I have those flashes too with last BeSweetGUI versions. Don't remember about old ones.
Res = 1024x768
OS = WinXP
GFX = Matrox G400

[DSPguru]

i once asked dd about it and he said that it caused by the fact the bubble window is too large and fails to find a place to be shown.