[LAU] consolidating a firewire sound card with my other existing pci (alsa) soundcards
jannis_achstetter at web.de
Sun May 2 18:42:29 CEST 2021
Have you tried having one jack server active with the firewire-backend
and then adding the other, ALSA-compatible cards via zita-a2j or a
That would only work if you don't need your current "primary" audio card
as the actual primary card.
And it might be some hassle if your FW-card is not always available or
you tend to change your setup frequently.
Am 02.05.21 um 10:38 schrieb Athanasios Silis:
> Hi there,
> Thank you for the information. Yes synchronisation is always an issue
> and perhaps I framed the question inadequately, but what I am after is
> not complete synchronisation but rather to utilise the analog ins and
> outs of this additional soundcard too.
> So I am not after 0ms latency per se, but rather something in the order
> <12msec. This has been possible across soundcards using the alsa driver,
> so I assume it is not out of place to aim for it now too. Perhaps this
> is not possible across different jack backend which is why I ask for the
> various setup possibilities.
> The easiest for me would be to use the saffireLE through the alsa
> driver, but that only exposes 1 single stereo playback stream. I want
> all 3. So what do I have?
> On Sat, 1 May 2021, 23:07 David Kastrup, <dak at gnu.org
> <mailto:dak at gnu.org>> wrote:
> Athanasios Silis <athanasios.silis at gmail.com
> <mailto:athanasios.silis at gmail.com>> writes:
> > Finally, is there a chance to coordinate 2 jack sessions (each with
> > one of alsa, firewire backends) with 0 latency between them ? In this
> > setup does anyone have experience with SaffireLE and how to control
> > the mixer?
> How is 0-latency supposed to work with unsynchronised clocks?
> If you want to consolidate multiple soundcards without adding
> significant latency for resampling filtering, they must be running on
> the same clock (which means that it's mainly comparatively expensive
> soundcards that can be consolidated). Even then you'll not be able to
> split a stereo channel across two non-identical cards without
> introducing problems from the differing phase response of their
> oversampling and filtering circuitry.
> Synchronisation can happen in some cases via Firewire (for example, if
> you daisychain multiple Alesis i|O 26 devices) but more usually with a
> separate word clock sync cable.
> For juggling numerous sources, there can be a point in getting a mixer
> with digital multi-channel in- and output.
> That means you don't need to consolidate multiple soundcards but rather
> get to work with some flexible multichannel device. That tends to be
> quite more robust.
> David Kastrup
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
More information about the Linux-audio-user