Re: [linux-audio-user] Converting sample rate: failed...

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Subject: Re: [linux-audio-user] Converting sample rate: failed...
From: Erik de Castro Lopo (erikd-lad_AT_mega-nerd.com)
Date: Sat Sep 11 2004 - 23:04:26 EEST

On Sat, 11 Sep 2004 23:42:44 +0400
Mikhail Ramendik <mr_AT_ramendik.ru> wrote:

> Thanks.
>
> Actually I have failed, but this is probably not a software fault. The
> 48000 to 44100 conversion (with both "best sinc" and "ZOH"

The ZOH converter should not be used for anything other than an
audio effect. You should also try SRC_SINC_MEDIUM_QUALITY and
SRC_SINC_FASTEST.

> interpolators) makes the sound *much* worse, the voice is distorted and
> becomes "ringing".

Does it also ring before you do the sample rate conversion?
 
> I tend to blame vinyl noise for this. Serious denoising distorts the
> sound too much so I don't do it.

The denoising is separate from the sample rate conversion. SRC should
not make it sound worse.

Erik 

-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo  nospam_AT_mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"The growing and dangerous intrusion of this new technology,
threatens an entire industry's economic vitality and future
security." -- Jack Valenti (MPAA president) on the video
cassette recorder, 1982.

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