IETF Opus codec now ready for testing Reply #475 – 2012-11-07 22:16:44 Quote from: Krillo on 2012-11-07 10:45:39I can't get it to work when I state multiple wav's (8 mono wav's), so if I rephrase my question:How do I state all the input files? One works fine, but multiple doesn't.Aha, 8 mono WAVs won't be recognised as being multiple channels, I believe. You need to render them into a multichannel WAV which will interleave the samples for all 8 channels at the same point in time. I can't recommend any software but a search for 7.1 channel audio editor freeware produces results such as n-Track Studio - just watch out for those annoyance-ware download managers and toolbar installers. That app claims to support multichannel WAV export, which should be just fine for providing to the Opus encoder and will tell it which channel is which. You might also wish to combine the LFE channel (the .1) into another channel, such as the centre channel - there's some guidance in the Opus pages, I believe.