Re: [SurroundSound] QUAD-FLACs are not in 4.0 but in 5.1

Sorry to resurrect this old thread... How did you do the following in Foobar2000 to reassign the side and rear channels?

"I've since created a button in Foobar which changes the channel layout Side > Rear."

How did you do this? I would love to be able to easily reassign the metadata to determine where the channels in 4.0 FLAC are played back. Thank you for any info.

-Jp  

On Tuesday, October 1, 2019 at 9:58:00 PM UTC-5, manxminx wrote:

I have a different explanation . . .  I'm presently listening to The Chicago Quadio set. If I look at the properties of a track in Foobar I get . .

Duration : 4:00.824 (23 119 104 samples)
Sample rate : 96000 Hz
Channels : 4: FL FR SL SR
Bits per sample : 24
Bitrate : 5370 kbps
Codec : FLAC
Encoding : lossless
Tool : reference libFLAC 1.3.1 20141125
Embedded cuesheet : no
Audio MD5 : C5005F9C6A15A3429B0C007AC401BA2B

I've highlighted the relevant part.  It would appear that the channel layout is encoded into the actual track properties (metadata). It took me ages at first to figure out why rear channels were sometimes playing on the side channels instead of the rear. I've since created a button in Foobar which changes the channel layout Side > Rear. All the multi-track albums I've got which play rear on the side channels have this set in the file properties, those albums which play correctly state "4: FL FR BL BR" in the file properties. Out of interest, 5 channel files state : "Channels : 5: FL FR LFE BL BR" or "Channels : 5: FL FR FC BL BR" with 6 channel files stating: Channels : 6: FL FR FC LFE BL BR

This is with both Flac and wav files -  the channel allocation metadata in the file properties is part of the flac standard. See https://xiph.org/flac/format.html#metadata_block
I can't find any proper documentation on wav metadata, but channel allocation looks to be definitely part of the metadata.

So, what I'm thinking is that when someone encodes a multichannel track into FLAC or rips it to wav, whatever, the channel mapping isn't working properly or is set wrong in the encoder, it may even have been the original software coder who screwed up in the code somewhere.. I've had a good look at the FLAC documentation but can't see where or how to encode channel allocations. There is a setting " --channels=# Specify the number of channels in the raw file. " but nothing about mapping channels. Goodness knows how one sets channel allocation in .wav

Ali.

I don't understand how

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