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Subject: Re: Recording speeds...
From: Rob Ward (wards_at_paradise.net.nz)
Date: 2002-07-04


So a sampling rate of 16kHz means it does 16000 (or 16384?) samples per
second? And the bitrate is the number of bits each sample uses?

Rob

Nielsen Linus (ext) wrote:

>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
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
>



Page was last modified "Jan 10 2012" The Rockbox Crew
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