Subject: Re: [ecasound] picking up stattic with -b:64
From: Jeremy Hall (jhall@UU.NET )
Date: Tue Jan 25 2000 - 19:20:20 EET
just to understand this, this is buf / (rate/1000) = time_in_msec right?
_J
In the new year, Jeremy Hall wrote:
> then when does db help you?
>
> _J
>
> In the new year, Kai Vehmanen wrote:
> > On Mon, 24 Jan 2000, Jeremy Hall wrote:
> >
> > >>> ecasound -i /dev/dsp -o stdout -z:db -b:64 | msend 239.1.1.1/24430/7
> > >> trouble if you go under -b:128. In this case, I suspect msend is not
> > >> able to pipe data fast enough (meaning latency, not transfer rate).
> > > it does a read() on 1024 bytes, then does a write() of the same data. It
> > > is a very simple program, and has no disk access. It then multicasts this
> >
> > It can still cause problems. Soundcard i/o consumes some of the
> > available time, so in practice msend has even less than 1.45ms (-b:64)
> > to do its stuff. And as far as I know, network cards (and TCP/IP stack
> > implementations) suffer from latency problems. But I'm no network-h/w
> > expert, so you probably know more about these...
> >
> > Btw; -z:db (double-buffering) doesn't do any good in this case. It
> > currently only affects .wav and .raw inputs.
> >
> > --
> > Kai Vehmanen <kaiv@wakkanet.fi> -------- CS, University of Turku, Finland
> > . http://www.wakkanet.fi/ecasound/ - linux multitrack audio processing
> > . http://www.wakkanet.fi/sculpscape/ - ambient-idm-rock-... mp3/ra/wav
> >
> >
>
>
This archive was generated by hypermail 2a24 : Tue Jan 25 2000 - 19:21:19 EET