Subject: Re: [linux-audio-dev] steinberg vst system link
From: Jay Ts (jay_AT_metran.cx)
Date: Sat Feb 16 2002 - 20:48:52 EET
Paul Davis wrote:
> > Jay Ts wrote:
> >Looks like it works by requiring a sound card with an ASIO driver,
> >and using the digital audio in and out, somewhat as I had guessed.
> >Then they can use up bit number 24 to send a bit of data with each
> >sample. Or use up more bits of the audio data to send more networking
> >data.
>
> that much is obvious from the articles.
>
> the question i have goes like this.
>
> you've got 1 bit at 44.1->96kHz, providing total bandwidth of
> 43-93kB/sec. with that bandwidth, you've got to:
>
> 1) encode temporal position
> 2) transmit transport state changes
Assuming that the implementation of the clock signal I wrote up
in my previous message is practicable, (here I go, running off
the edge of the cliff... :) how about if instead of the clock
being a 32-bit integer, it were fewer bits. The remote system
would extract the clock information by looking for a subset of
the bits to match except for one bit, and mask off the high-order
bits to ignore in that comparison. After getting the clock data
sync'd, those masked off bits could be used to encode/extract
transport information in much the same manner.
> there has been
> a significant discussion of this on the vst-plugins list (in the
> context of regular VST), and we've also talked about it quite a bit on
> jackit-devel.
Well, I have been "out of it" for many months, so I pray that I'm
not repeating any of the discussion there.
> in addition, it appears to me that you still need up running word
> clock to make sure the interfaces all see the same sample value at the
> same time; yet steinberg don't mention this. this is either the usual
> marketing BS, or they've figured some way around it.
>
> so, i'm confused about exactly *what* they have done and *how* they
> have done it.
I don't think we can be really clear on much of anything regarding System
Link considering how little information (mostly "marketing BS") that
Steinberg has released thus far. Unless of course, we are "psychic". :)
Jay Ts
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