Subject: Re: [ecasound] problems with an old frames_per_cycle worth of audio after unmuting
From: Jeremy Hall (jhall_AT_uu.net)
Date: Mon Nov 26 2001 - 21:26:05 EET
In the new year, Kai Vehmanen wrote:
> On Tue, 13 Nov 2001, Jeremy Hall wrote:
>
> > I dunno, my audio inputs, some of them, must be offset, so using setpos,
> > rw, fw, or the like, causes all my inputs to become desynced DRASTICALLY!
>
> I know, this is an annoying feature. But it really is a feature, not a
> bug. The -y:xxx option is basicly just "ai-select file.wav + ai-setpos
> xxx" that is executed once when chainsetup is created. If you issue
> "setpos", you will change positions of all files, and will lose the
> -y offset. You could manually re-offset all individual objects after doing
> a global setpos/fw/rw.
>
> But yup, this is starting to get too complex for manual work... better to
> write a script or a frontend.
>
yes, perhaps if the .ewf file format were modified and could be in xml and
could read an ardour playlist, life would be MUCH easier!
> > you see in my pervious post, channels 7 and 8 were added late and I had to
> > compute the correct position by calculating the seconds offset from
> > ardour's frame position. I'd much rather use ardour's frame position for
> > frame-sync, but I guess that ain't going to happen.
>
> I haven't used ardour so I'm not sure what frame means here, but if it's
> sample-frame, then you can use ecasound's 'ai-set-position-samples', etc
> to set exact position.
>
A frame is the same as in alsa, a sample, thus an f32_le frame is 4 bytes,
while an s16_le frame is 2 bytes.
_J
> --
> http://www.eca.cx
> Audio software for Linux!
>
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