I have finally found out how to do this with VLC in OpenBSD, but I guess it also applies to any other OS.

The point is to go to `tools --> Effects and filters`

and then in the `Compressor`

tab pick up values similar to these in the picture.

I later found the reason why but I lost the source (if the author reads this, please contact me to give you credit).

**Threshold Slider**: Threshold determines when the compressor begins to act. The sound wave doesn’t go above this point. Our example has **-23.8 dB**. As the signal goes above -23.8 dB, the compression will happen.

Ratio: It is the ratio of the input to the output of the signal that crosses the threshold. Our example shows a high 20:1 ratio. That means, for every 20 dB over the threshold, the compressor will output 1db of that signal. That’s a lot of compressions. 1:1 means no compression.

**Attack and Release**: These two are used to determine the speed of the compression. When the signal reaches the threshold, the attack will dictate how fast it will start. The release is when it goes back to the original tone after the compression ends.

**Makeup Gain**: Sliding this will make the quiet parts (those with the dialogues) louder.

The settings might depend from movie to movie and scene to scene. But remember that the makeup gain slider is moved so that you can hear the quiet parts and ratio and threshold slider will affect the action parts with heavy sound effects. Play with these settings a little more to get the best output.

]]>Dear Peter, I am writing a script in python (actually a friend of mine who’s very efficient in programming, Marc Freitag) to convert your fortran output format into something easier to use for me. In the timesteps blocks, one gets this kind of headers:

165M/dty/ P/Pn/e/ xi/zet/ tN/ZAPS/ LH/LHE/LC Pcr/Rcz/ MH/Me/MC/ XH XHe XC XN XO XNe lXC13 MH/MHe/ psi logrho logT

age/cm/Horb rf1/Fn mt/rf2/dF tET/DL/BE /Lnu/Lth DRcz/RA/Bp QM/tTFy convective/semiconvective bdries mc/k^2 km/DLP Vrot logR logL

For that he is “translating” all of this information into 87 (!) columns, so that I can easily e.g. plot column 23:45. The code itself I would not want to touch.

The python produces a big file concatenating all timesteps with a header which I have split now in this web page into single lines.

Could you please confirm the following interpretation of the various quantities?

1:model_number

2:M - total mass of the star

3:P - periode of the binary

4:xi - binary mass transfer rate

5:tN - nuclear timescale

6:LH - H lum

7:Pcr - P crit (critical for what??)

8:MH - Mass in Hydrogen-burning shell

9:XH_cntr - H fraction at centre

10:XHe_cntr - He fraction at centre

11:XC_cntr - C fraction at centre

12:XN_cntr - N fraction at centre

13:XO_cntr - O fraction at centre

14:XNe_cntr - Ne fraction at the centre

15:lXC13_cntr - log C13 fraction at centre

16:MH - Mass in H-burning shell AGAIN? SAME AS 8?

17:psi_cntr - electron degeneracy at the centre

18:logrho_cntr - log density at the centre

19:logT_cntr - log temperature at the centre

20:dty - time step

21:Pn - Rotation periode

22:zet - wind mass loss rate

23:ZAPS - unknown ?

24:LHE - lumi. He

25:Rcz - unknown ?

26:Me - unknown ?

27:XH_Tmax - H fraction at Tmax

28:XHe_Tmax - He fraction at Tmax

29:XC_Tmax - C fraction at T max

30:XN_Tmax - N fraction at T max

31:XO_Tmax - O fraction at Tmax

32:XNe_Tmax - Ne fraction at Tmax

33:lXC13_Tmax - log C13 fraction at Tmax

34:MHe - Mass of He-burning shell (is this at Tmax??)

35:psi_Tmax - electron degeneracy at Tmax

36:logrho_Tmax - log density at Tmax

37:logT_Tmax - log Temp at Tmax

38:age - time in yrs

39:e - eccentricity of binary

40:mt - unknown???

41:tET - unknown???

42:LC - Lumin. of C burning

43:ERcz - unknown???

44:MC - Mass of C-burning shell

45:XH_srfc - fraction of H at surface

46:XHe_srfc - fraction of He at surface

47:XC_srfc - fraction of C at surface

48:XN_srfc - fraction of N at surface

49:XO_srfc - fraction of O at surface

50:XNe_srfc - fraction of Ne at surface

51:lXC13_srfc - log fraction C13 at surface

52:km - unknown??

53:psi_srfc - electron degeneracy at surface

54:logrho_srfc - log density at surface

55:logT_srfc - log temp. at surface

56:cm - unknown ??

57:rf1 - unknown ??

58:rf2 - unknown ??

59:EL - unknown ??

60:Lnu - luminosity neutrinos

61:RA - Alfven radius

62:QM - unknown ??

63:zb_01 - unknown ??

64:zb_03 - unknown ??

65:zb_05 - unknown ??

66:zb_07 - unknown ??

67:zb_09 - unknown ??

68:zb_11 - unknown ??

69:mc - unknown ??

70:ELP - unknown ??

71:Vrot - rotational velocity

72:logR - log total radius of star

73:logL - log total lum. of star

74:Horb - orbital angular momentum

75:Fn - unknown ??

76:dF - unknown ??

77:BE - unknown ??

78:Lth - Thermal luminousity

79:Bp - magnetic field

80:tTFy - unknown ??

81:zb_02 - unknown ??

82:zb_04 - unknown ??

83:zb_06 - unknown ??

84:zb_08 - unknown ??

85:zb_10 - unknown ??

86:zb_12 - unknown ??

87:k^2 - unknown ??