Subject: Re: [linux-audio-dev] Using Jack for "Control Volt" signals?
From: Jack O'Quin (joq_AT_io.com)
Date: Sun Nov 09 2003 - 06:28:28 EET
iainduncan_AT_telus.net writes:
> Sorry if this is the wrong place, please tell me where to ask if it
> is.
This is not off-topic for LAD, but there is also a jackit-devel
mailing list for detailed JACK questions.
> I'm wondering whether it will be possible, ( or if anyone is doing
> something similar ) to use Jack to pass control signals between
> audio apps.
That should work.
I've experimented with generating SMPTE timecode from a JACK client.
That's a control signal of a sort, though different from what you're
doing.
> Also, does or will Jack allow signals to be lower bit depth or
> sample rate when full audio resolutions is not necessary, or will it
> always be full audio?
All JACK client audio uses single-precision float data and a common
sample rate. The nominal range is [-1.0,...,1.0], but this is not
enforced by the server. The effective "bit depth" of IEEE float data
is 25 bits.
> Is there any limit to the number of ins and outs Jackable? I guess
> to make modular synthesis between various apps one would start using
> a *LOT* of them.
Sure there are limits. I think the server currently only allocates
space for something like 256 ports. If that's a problem it can
probably be fixed.
-- Jack O'Quin Austin, Texas
This archive was generated by hypermail 2b28 : Sun Nov 09 2003 - 06:26:31 EET