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Subject: RE: Recording speeds...
From: Nielsen Linus (ext) (Linus.Nielsen_at_elema.siemens.se)
Date: 2002-07-04


The sampling rate is not the same thing as the bit rate. To put it simply,
the sampling rate controls the frequency response and the amount of
information to compress and the bit rate controls how hard you compress that
information.

/The other Linus

> -----Original Message-----
> From: Rob Ward [mailto:wards_at_paradise.net.nz]
> Sent: den 4 juli 2002 11:36
> To: rockbox_at_cool.haxx.se
> Subject: Re: Recording speeds...
>
>
> Thanks Linus. I don't quite understand ... if it uses VBR,
> and you can
> choose the quality, then what does the sampling rate settings do? Do
> they over-ride the VBR, or are they a minimum the VBR uses?
>
> Rob
>
>
>
> Linus G Larsson wrote:
>
> >Rob,
> >
> >The Recorder doesn't use fixed bitrates - it records as VBR, so you
> >don't get to tell it which bitrate to use, but rather which quality.
> >When I chose quality 0 (low) and recorded speech, it ended up as
> >88kbit/s.
> >Joint-stereo recording seems to be the only one available.
> >You can choose sampling rate as well, between 16-44.1 kHz.
> >
> >Note: This is all using the Archos firmware - I don't know if the
> >chipset supports other settings.
> >
> >On Thu, 2002-07-04 at 05:17, Rob Ward wrote:
> >
> >
> >>Hi. Just wondering what the MINIMUM recording speed for the
> AJBR is. For
> >>recording university lectures and church sermons, a speed of about
> >>32ksps mono is probably ideal. (Is it possible to do stereo
> recording?)
> >>
> >>Also, I note the Nomad 3 unit at ...
> >>
> >>http://www.nomadworld.com/products/jukebox3/specs.asp
> >>
> >>... which has firewire and USB ports, infrared remote
> controls, plus
> >>some other nice features. Looks much larger than the archos
> unit, but
> >>will not work under either of my OS's ... NT4 or Linux.
> Anybody have any
> >>thoughts on it in comparison to the Archos units?
> >>
> >>Rob
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
>
>



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