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Old 5th August 2008, 03:00 AM   #11
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Excellent work Koon! Is there a way to get this working so you could stream any audio source in? For instance, I have two sound cards. One soundcard takes any external audio - analog signal/digital signal, and sends an SPDIF signal to the second sound card. The second sound card applies realitime FIR crossover and channel delay to that incoming S/PDIF signal. So, in essence, I can listen to anything realtime - TV, sports, movies, and of course music., I just need to hook it up to the first sound card.
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Old 5th August 2008, 03:46 AM   #12
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Hi tschanrm, actually I don't have full knowledge of multimedia streaming, but it will be convenient.

(1) Output stream : I don't have to keep huge 8 channel wave file.
(2) Input stream : selectable for stored WAV file, or external input.

I wonder there should be many "multimedia programmer" skilled than me but no contact or feedback yet.

Maybe stream handling will be difficult than file handling, but sometime I hope to study / implement....
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Old 5th August 2008, 08:32 AM   #13
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Hi folks.

When it comes to routing flexibility Linux respectively ALSA lets you do quite some weired stuff:

http://alsa.opensrc.org/SurroundSound

The questions remains if I can address and send data over HDMI Tx ch0 to RX ch0, Tx ch1 to Rx ch1 asf. And on the Rx side map Rx0 to Amp0, RX1 to Amp1....

@Thomaseliot: There you can also read how to route from stereo .wav to multichannel.

Cheers
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Old 6th August 2008, 04:15 AM   #14
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I uploaded test tone wave file, to make it easy to test your environment can play 8channel audio.
CH1,2,3,4,5,6,7,8 = { 200, 400,600,800,1000,1200,1400,1600 Hz}

Playing in Loop mode, attaching single speaker to each speaker terminal of AV Amplifier.. easy to check 8 channel is played or not.

and source code to make this wave file is also available.

http://koonlab.com/MultiAmpForEveryo...DMI_AVAMP.html
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Old 6th August 2008, 07:20 AM   #15
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BTW:

Auzentech and Asus coming up with 8*LPCM over HDMI PCI soundcards.

http://www.bit-tech.net/hardware/200...tex-2008-psp/1

http://www.xpmediacentre.com.au/comm...by-truehd.html
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Old 6th August 2008, 07:55 AM   #16
phofman is offline phofman  Czech Republic
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The wonderful audio Swiss Army knife SoX http://sox.sourceforge.net/ provides LOTS of functions, among them merging audio files to create multitrack outputs. Works fine on windows too. You may find it useful just as I did And btw writing a new effect module is pretty simple, sox just passes x-dimensional arrays of long ints, all the format conversions and the other stuff taken care of.
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Old 6th August 2008, 08:04 AM   #17
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Koons fir-engine output could be piped realtime into Sox, which outputs the multichannel-wav over HDMI?
Is this your idea with Sox?
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Old 6th August 2008, 08:56 AM   #18
phofman is offline phofman  Czech Republic
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Well, I do not know about piping multiple streams through sox on windows (I guess not feasible), I think Koons FIR engine produces multichannel output directly.
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Old 6th August 2008, 09:03 AM   #19
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Koon is using a multichannel .wav and not mutiple streams as far as I understood.
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Old 6th August 2008, 01:28 PM   #20
fb is offline fb  Australia
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Perhaps an ideal solution would be

Audio app -> Jack -> Koon's FIR engine -> Jack -> HDMI out

Jack is available for Windows and OSX now as well as linux. I wonder if Koon's FIR engine is suitable for realtime processing of streams? Possibly it could be ported to Linux and OSX as well.
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