7 Oct
2003
7 Oct
'03
8:38 p.m.
On Tue, 7 Oct 2003 23:51:07 +0300 (EEST)
Tommi Sakari Uimonen <tuimonen(a)cc.hut.fi> wrote:
Hi. If I want to resample from 96khz to 48khz, what
would give the best
result: use libsamplerate, or just drop off odd (or even) samples?
I guess the libsamplerate and any of its interpolations would cause some
digital garbage anyway,
Sample rate conversion using libsamplerate's SRC_SINC_* converters gives a
signal to noise ratio of 96dB or better. Yes there is some digital garbage
but its probably less than the noise picked when an instrument is recorded
with a microphone.
or are they intellectual enough to detect that the
rate is halved and just perform a drop off?
On most normal signals, dropping every second sample will sound considerably
worse than what libsamplerate does. I suggest that you read up on sampling
and aliasing for an explanation of why.
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam(a)mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"OS X is great that way. I put a copy of OS X on my coffee table,
and it hasn't been hacked yet. Yes, I am using it as a server. I
serve several meals on it every week." -- Anthony Minkoff