Doom9's Forum - View Single Post - BeSweet v1.4b12 & Dolby Surround II Matrix

frank · 25th June 2002, 15:21

Yeah! Now I can sleep well.

The constant signal power for all reproduced channels is maintained now.

C and LFE are splitted in two parts with half of the power. Means -3 db level attenuation if you don't want any power change. The decoder sums the two parts back into ONE channel!

LFE is a small bandwith low bass channel. Greater signal raising time and delaying. I think these artifacts come from Dolby compression and aren't audible at this low frequencies.

For downmixing is no need to mix the LFE if the AC-3 tracks are right mastered - Dolby says. 5ch into 2ch mix is a consumer adaption. And which consumer has a separated active subwoofer (30 cm loudspeakers)? Very expensive technics, needed by THX systems only. But this HiFi fans normally use 5.1 audio.

25th June 2002, 15:21	#8 \| Link
frank Banned Join Date: Oct 2001 Location: https://t.me/pump_upp Posts: 811	Yeah! Now I can sleep well. The constant signal power for all reproduced channels is maintained now. C and LFE are splitted in two parts with half of the power. Means -3 db level attenuation if you don't want any power change. The decoder sums the two parts back into ONE channel! LFE is a small bandwith low bass channel. Greater signal raising time and delaying. I think these artifacts come from Dolby compression and aren't audible at this low frequencies. For downmixing is no need to mix the LFE if the AC-3 tracks are right mastered - Dolby says. 5ch into 2ch mix is a consumer adaption. And which consumer has a separated active subwoofer (30 cm loudspeakers)? Very expensive technics, needed by THX systems only. But this HiFi fans normally use 5.1 audio. Last edited by frank; 26th June 2002 at 09:37.