Re: Sampling frequency (alexander lerch )

Subject: Re: Sampling frequency
From:    alexander lerch  <lerch(at)ZPLANE.DE>
Date:    Wed, 29 Dec 2004 11:58:23 +0100

Dear Claire, Ajith,

I would use other terms:
1. If the sample rate is *adjusted* without changing the
samples itself, pitch and duration will be affected.

2. If the sample rate is *converted* (resampling/sample rate
conversion), neither pitch nor duration will be affected.
However, the quality will (at least theoretically) decrease
due to the filter/interpolation algorithm used.

The quality of any audio sample will never increase when
converting to higher sample rates than the original sample
rate. However, higher sample rates are often used in the case
of non-linear processing (i.e. distortion, tube emulation,
etc.) when high frequency content is generated.

Best regards,
Alexander

Claire Piché wrote:
> Dear Ajith,
>
>
> 1.    If the original recording is CONVERTED at another frequency sample
> rate then the original, the pitch and duration will be affected.
>
> 2.    If the original recording is RECORDED at another frequency sample
> rate then the original, the pitch and duration will NOT be affected.
> 2.1   Nevetheless, recording at a frequency sample rate lower then the
> original will impoverished the quality of the timbre.
>
>
> Claire Piché
> ambiophonist
>
>
--
dipl. ing.
alexander lerch

zplane.development
http://www.zplane.de
holsteinische str. 39-42
D-12161 berlin
 fon: +49.30.854 09 15.0
 fax: +49.30.854 09 15.5