Re: [Linuxsampler-devel] LSCP Protocols - Some confusion about mixing vs. channels

[Vladimir S. <ha...@gm...>]

Hi guys,

> > c) Separate outputs for each gig come out but attach to separate
> > alsa_pcm:playback_XX channels. The audio is mixed in hardware with no
> > CPU overhead.
> 
> Well, just mixing does almost mean no cpu load. Memory bandwith will come more
> into weight.

In case of jack, yes.
But in case of multichannel card . . . there will also be a hit on the
PCI throughput.
I'm assuming that DMA is transferring the data.
In some cases PCI could be a significant bottleneck too . . .
But . . . if it is functionally required to have multiple HW channels
(if mixing is done "outside" the sampler machine on some other system)
then this is what we have to do, but for purely functional reasons,
not for performance reasons.

Regards,
Vladimir.