Lossy codec with full bandwidth LFE?

[j7n]

Is there a lossy codec that can encode full bandwidth LFE channel? With music programmes in lossless formats, the LFE usually is not lowpassed, and I would prefer to keep it that way. This allows the option to hear and extract full bass instruments with sharp attacks. So far I've found that Vorbis keeps the most, about 250 Hz. An Opus test clip can be found where the LFE contains the speech utterance "the cow says kaboom" in decent clarity at about 4000 Hz, but it is not known what hidden setting was used to produce it.

[tebasuna51]

A LFE channel with frequencies at 4000 Hz is not a LFE channel, if your audio equipment send it to subwoofer these frequencies are also ignored/filtered.

If you have a LFE like that you can mix it to other channel (select you where is the cow) and leave it empty, your audio equipment will filter only the low frequencies to subwoofer.

[j7n]

On SACD and DVD-А the LFE channel usually has full bandwidth instruments in it, drums and bass (without me doing any processing).

I discovered that in REAPER I can encode OPUS as 6 independent channels if the following checkbox is cleared: "Encode 3-8 channel audio as 2.1-7.1 (LFE)". The encode doesn't seem to make use of coupling, or coupling with the correct pair because the spectrum is blocky at 590 kbit/s. MediaInfo doesn't show any channel order. Some programs might not play it well. It plays in Foobar2000. REAPER is a bit special because you need to manage the channel order yourself. By default it is N channels in, N channels out in the same positions.

Opus is not a great codec though. Another option is WavPack Lossy, which is the slowest codec of all even on Normal (slower than DTS).

Here is an example spectrogram. Channel 4 has bass, kick, snare and other percussion.

https://i.imgur.com/xib4LjC.png

Here the last 10 seconds has some "spaceship hum" besides the drums

https://i.imgur.com/kfinWTt.png

[tebasuna51]

On SACD and DVD-А the LFE channel usually has full bandwidth instruments in it, drums and bass (without me doing any processing)...

If you have a source wrong mastered and you want recover the full bandwidth you need mix the LFE to other channel like I say you.

Because if your audio equipment send it to subwoofer you never can listen that audio frequencies not mather the encoder you use.