Re: [Linuxsampler-devel] Sampler quality comparison...

[Mark K. <mk...@co...>]

be...@ga... wrote:
> I did not interpret your message as a feature request.
> it's just that a decent softsampler should support independent
> sample rates for libraries and audio output and since
> this feature is very easy to implement and does not use additional
> CPU when library sample rate = audio card sample rate 
> so I see no reason not to implement it :)
> I'm still wondering why GSt does not support it.
> 
> Mark a question: if you have a sound card that can do up to 96Khz
> (44,48,88,96).
> Assume you use a 44.1kHz GIG.
> What happens if you want to work with higher sample rates because
> your other audio files are all using this higher sample rate ?
> As you said in the library SR=44kHz, souncard SR=48kHz you experience
> the nasty pitch transpose effect.

I can't say exactly, but one of these days I could setit up and try it. 
Here's the reason:

Pro Tools <===> 002R <<============>> RME HDSP9652 <==>GSt
                  48K    ADAT Cable     96KHz Card
                       Digital sync-->

Since I use an ADAT optical cable between Pro Tools and GSt the only 
options I have are 44.1K and 48K. Since, for digital sync reasons, the 
GSt machine runs as a slave to the Pro Tools clock, all I can work in 
are 44.1K or 48K. ADAT (on the Pro Tools system) won't send 88.2K & 96K.

I'm not sure what GSt would do if I set the system to 96K.
> 
> But if you use 88kHz on the soundcard ?
> Can GSt avoid pitch transpose in that case since it's just twice
> the original sample rate (44.1kHz) ?
> Or does it play all notes at twice of the pitch ?

If the 44.1/48K experiment holds then it will play at twice the pitch. 
My experience is that GSt doesn't know what the sample rate it. It jsut 
receives clocks and plays samples. The fact that the pitch is 2X is my 
problem.

> 
> just curious  :)
> 
> PS: please when replying reply only to the list otherwise the poster
> always gets two messages.
> 
> cheers,
> Benno