A parallel discussion has been taking place in the music bar ([EMAIL PROTECTED]). I've given some of the more important comments below.
>I think sending realtime audio data via eternet will be >extremely difficult. It should be impossible to synchronize >sample clock via ethernet. So each device has to have its >own sample clock. There is a protocol for determining which device is the master clock, which is apparently "automatic and transparent to the user". Perhaps more urgent are the fact that timing delays introduced by the fact that the Gibson protocol DAISYCHAINS (which causes a whole host of other problems) will screw MIDI up no end. On the mLAN front, yes they do seem to be very similar, except that mLAN works across FireWire, and is based on AMP (the Audio and Music Data Transmission Protocol), which you can use without signing any agreements with the evil guitar moloch from hell. >4) All the problems of sending audio over packets have already been solved >by the Voice over IP people. I am somewhat sceptical: did they solve it for multiple streams of sound sampled at 192khz? Indeed Gibson claims Magic provides up to 32 streams of 32-bit full-duplex sound at 192khz = 192Mbit/s, which is quite impressive for ethernet, to say the least. In fact the Gibson offering's main problems are with the control side of things: Alastair Johnson pointed out the following quote from Gibson: <evil guitar moloch> Any device can assign a Control Link between a Source and a Target on the network. The device making the assignment does not have to be the one with either the Source or the Target. If that is the case, the assigning device must issue the Assign Control Link message to both the Source and the Target. </evil guitar moloch> <alastair> I can already imagine the mayhem when two pieces of software/hardware try and assign or remove Control Link to the same Sources and Targets. There is no acknowledge message defined for this assign so if a control packet is lost or if there are conflicting interests, there is no way to know. Let alone fix it. (Hey why does the Cutoff knob on my Virus C suddenly control the pitch of my Andromeda A& and my Kurzweill K2700?) </alastair> All in all the thing seems to be rather badly thought out. _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
